1
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Singh P, St Clair JB, Lind BM, Cronn R, Wilhelmi NP, Feau N, Lu M, Vidakovic DO, Hamelin RC, Shaw DC, Aitken SN, Yeaman S. Genetic architecture of disease resistance and tolerance in Douglas-fir trees. THE NEW PHYTOLOGIST 2024; 243:705-719. [PMID: 38803110 DOI: 10.1111/nph.19797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 03/18/2024] [Indexed: 05/29/2024]
Abstract
Understanding the genetic basis of how plants defend against pathogens is important to monitor and maintain resilient tree populations. Swiss needle cast (SNC) and Rhabdocline needle cast (RNC) epidemics are responsible for major damage of forest ecosystems in North America. Here we investigate the genetic architecture of tolerance and resistance to needle cast diseases in Douglas-fir (Pseudotsuga menziesii) caused by two fungal pathogens: SNC caused by Nothophaeocryptopus gaeumannii, and RNC caused by Rhabdocline pseudotsugae. We performed case-control genome-wide association analyses and found disease resistance and tolerance in Douglas-fir to be polygenic and under strong selection. We show that stomatal regulation as well as ethylene and jasmonic acid pathways are important for resisting SNC infection, and secondary metabolite pathways play a role in tolerating SNC once the plant is infected. We identify a major transcriptional regulator of plant defense, ERF1, as the top candidate for RNC resistance. Our findings shed light on the highly polygenic architectures underlying fungal disease resistance and tolerance and have important implications for forestry and conservation as the climate changes.
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Affiliation(s)
- Pooja Singh
- Department of Biological Sciences, University of Calgary, Calgary, AB, T2N 1N4, Canada
- Aquatic Ecology & Evolution Division, Institute of Ecology and Evolution, University of Bern, Bern, CH-3012, Switzerland
- Department of Fish Ecology & Evolution, Swiss Federal Institute of Aquatic Science and Technology (EAWAG), Kastanienbaum, CH-6047, Switzerland
| | - J Bradley St Clair
- USDA Forest Service, Pacific Northwest Research Station, 3200 SW Jefferson Way, Corvallis, OR, 97331, USA
| | - Brandon M Lind
- Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, V6T1Z4, BC, Canada
| | - Richard Cronn
- USDA Forest Service, Pacific Northwest Research Station, 3200 SW Jefferson Way, Corvallis, OR, 97331, USA
| | - Nicholas P Wilhelmi
- Forest Health Protection, USDA Forest Service, Arizona Zone, Flagstaff, AZ, 86001, USA
| | - Nicolas Feau
- Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, V6T1Z4, BC, Canada
| | - Mengmeng Lu
- Department of Biological Sciences, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Dragana Obreht Vidakovic
- Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, V6T1Z4, BC, Canada
| | - Richard C Hamelin
- Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, V6T1Z4, BC, Canada
| | - David C Shaw
- Department of Forest Engineering, Resources and Management, Oregon State University, Corvallis, OR, 97331, USA
| | - Sally N Aitken
- Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, V6T1Z4, BC, Canada
| | - Sam Yeaman
- Department of Biological Sciences, University of Calgary, Calgary, AB, T2N 1N4, Canada
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2
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Xu S, Wei X, Yang Q, Hu D, Zhang Y, Yuan X, Kang F, Wu Z, Yan Z, Luo X, Sun Y, Wang S, Feng Y, Xu Q, Zhang M, Yang Y. A KNOX Ⅱ transcription factor suppresses the NLR immune receptor BRG8-mediated immunity in rice. PLANT COMMUNICATIONS 2024:101001. [PMID: 38863209 DOI: 10.1016/j.xplc.2024.101001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 04/21/2024] [Accepted: 06/10/2024] [Indexed: 06/13/2024]
Abstract
Nucleotide-binding site and leucine-rich repeat (NLR) proteins are activated by detecting pathogen effectors, which in turn trigger host defenses and cell death. Although many NLRs have been identified, the mechanisms responsible for NLR-triggered defense responses are still poorly understood. In this study, through a genome-wide association study approach, we identified a novel NLR gene, Blast Resistance Gene 8 (BRG8), which confers resistance to rice blast and bacterial blight diseases. BRG8 overexpression and complementation lines exhibit enhanced resistance to both pathogens. Subcellular localization assays showed that BRG8 is localized in both the cytoplasm and the nucleus. Additional evidence revealed that nuclear-localized BRG8 can enhance rice immunity without a hypersensitive response (HR)-like phenotype. We also demonstrated that the coiled-coil domain of BRG8 not only physically interacts with itself but also interacts with the KNOX Ⅱ protein HOMEOBOX ORYZA SATIVA59 (HOS59). Knockout mutants of HOS59 in the BRG8 background show enhanced resistance to Magnaporthe oryzae strain CH171 and Xoo strain CR4, similar to that of the BRG8 background. By contrast, overexpression of HOS59 in the BRG8 background will compromise the HR-like phenotype and resistance response. Further analysis revealed that HOS59 promotes the degradation of BRG8 via the 26S proteasome pathway. Collectively, our study highlights HOS59 as an NLR immune regulator that fine-tunes BRG8-mediated immune responses against pathogens, providing new insights into NLR associations and functions in plant immunity.
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Affiliation(s)
- Siliang Xu
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China
| | - Xinghua Wei
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China; National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya 572024, China
| | - Qinqin Yang
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China
| | - Dongxiu Hu
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China
| | - Yuanyuan Zhang
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China
| | - Xiaoping Yuan
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China
| | - Fengyu Kang
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China
| | - Zhaozhong Wu
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China
| | - Zhiqin Yan
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China; National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya 572024, China
| | - Xueqin Luo
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China; National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya 572024, China
| | - Yanfei Sun
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China
| | - Shan Wang
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China
| | - Yue Feng
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China
| | - Qun Xu
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China
| | - Mengchen Zhang
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China; National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya 572024, China.
| | - Yaolong Yang
- China National Center for Rice Improvement/State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 310006, China; National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya 572024, China.
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3
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Ku YS, Liao YJ, Chiou SP, Lam HM, Chan C. From trade-off to synergy: microbial insights into enhancing plant growth and immunity. PLANT BIOTECHNOLOGY JOURNAL 2024. [PMID: 38735054 DOI: 10.1111/pbi.14360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 02/27/2024] [Accepted: 04/06/2024] [Indexed: 05/14/2024]
Abstract
The reduction in crop yield caused by pathogens and pests presents a significant challenge to global food security. Genetic engineering, which aims to bolster plant defence mechanisms, emerges as a cost-effective solution for disease control. However, this approach often incurs a growth penalty, known as the growth-defence trade-off. The precise molecular mechanisms governing this phenomenon are still not completely understood, but they generally fall under two main hypotheses: a "passive" redistribution of metabolic resources, or an "active" regulatory choice to optimize plant fitness. Despite the knowledge gaps, considerable practical endeavours are in the process of disentangling growth from defence. The plant microbiome, encompassing both above- and below-ground components, plays a pivotal role in fostering plant growth and resilience to stresses. There is increasing evidence which indicates that plants maintain intimate associations with diverse, specifically selected microbial communities. Meta-analyses have unveiled well-coordinated, two-way communications between plant shoots and roots, showcasing the capacity of plants to actively manage their microbiota for balancing growth with immunity, especially in response to pathogen incursions. This review centers on successes in making use of specific root-associated microbes to mitigate the growth-defence trade-off, emphasizing pivotal advancements in unravelling the mechanisms behind plant growth and defence. These findings illuminate promising avenues for future research and practical applications.
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Affiliation(s)
- Yee-Shan Ku
- School of Life Sciences and Center for Soybean Research of the State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Yi-Jun Liao
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Shian-Peng Chiou
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
| | - Hon-Ming Lam
- School of Life Sciences and Center for Soybean Research of the State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong
- Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Ching Chan
- Department of Life Science, National Taiwan Normal University, Taipei, Taiwan
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4
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Pandey MK, Gangurde SS, Shasidhar Y, Sharma V, Kale SM, Khan AW, Shah P, Joshi P, Bhat RS, Janila P, Bera SK, Varshney RK. High-throughput diagnostic markers for foliar fungal disease resistance and high oleic acid content in groundnut. BMC PLANT BIOLOGY 2024; 24:262. [PMID: 38594614 PMCID: PMC11005153 DOI: 10.1186/s12870-024-04987-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 04/03/2024] [Indexed: 04/11/2024]
Abstract
BACKGROUND Foliar diseases namely late leaf spot (LLS) and leaf rust (LR) reduce yield and deteriorate fodder quality in groundnut. Also the high oleic acid content has emerged as one of the most important traits for industries and consumers due to its increased shelf life and health benefits. RESULTS Genetic mapping combined with pooled sequencing approaches identified candidate resistance genes (LLSR1 and LLSR2 for LLS and LR1 for LR) for both foliar fungal diseases. The LLS-A02 locus housed LLSR1 gene for LLS resistance, while, LLS-A03 housed LLSR2 and LR1 genes for LLS and LR resistance, respectively. A total of 49 KASPs markers were developed from the genomic regions of important disease resistance genes, such as NBS-LRR, purple acid phosphatase, pentatricopeptide repeat-containing protein, and serine/threonine-protein phosphatase. Among the 49 KASP markers, 41 KASPs were validated successfully on a validation panel of contrasting germplasm and breeding lines. Of the 41 validated KASPs, 39 KASPs were designed for rust and LLS resistance, while two KASPs were developed using fatty acid desaturase (FAD) genes to control high oleic acid levels. These validated KASP markers have been extensively used by various groundnut breeding programs across the world which led to development of thousands of advanced breeding lines and few of them also released for commercial cultivation. CONCLUSION In this study, high-throughput and cost-effective KASP assays were developed, validated and successfully deployed to improve the resistance against foliar fungal diseases and oleic acid in groundnut. So far deployment of allele-specific and KASP diagnostic markers facilitated development and release of two rust- and LLS-resistant varieties and five high-oleic acid groundnut varieties in India. These validated markers provide opportunities for routine deployment in groundnut breeding programs.
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Affiliation(s)
- Manish K Pandey
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India.
| | - Sunil S Gangurde
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Yaduru Shasidhar
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Vinay Sharma
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Sandip M Kale
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Aamir W Khan
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Priya Shah
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Pushpesh Joshi
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | | | - Pasupuleti Janila
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Sandip K Bera
- ICAR-Directorate of Groundnut Research, Junagadh, India
| | - Rajeev K Varshney
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India.
- Centre for Crop and Food Innovation, WA State Agricultural Biotechnology Centre, Murdoch University, Murdoch, Australia.
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5
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Manrique S, Cavalleri A, Guazzotti A, Villarino GH, Simonini S, Bombarely A, Higashiyama T, Grossniklaus U, Mizzotti C, Pereira AM, Coimbra S, Sankaranarayanan S, Onelli E, Masiero S, Franks RG, Colombo L. HISTONE DEACETYLASE19 Controls Ovule Number Determination and Transmitting Tract Differentiation. PLANT PHYSIOLOGY 2024; 194:2117-2135. [PMID: 38060625 PMCID: PMC10980524 DOI: 10.1093/plphys/kiad629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 10/29/2023] [Indexed: 04/01/2024]
Abstract
The gynoecium is critical for the reproduction of flowering plants as it contains the ovules and the tissues that foster pollen germination, growth, and guidance. These tissues, known as the reproductive tract (ReT), comprise the stigma, style, and transmitting tract (TT). The ReT and ovules originate from the carpel margin meristem (CMM) within the pistil. SHOOT MERISTEMLESS (STM) is a key transcription factor for meristem formation and maintenance. In all above-ground meristems, including the CMM, local STM downregulation is required for organ formation. However, how this downregulation is achieved in the CMM is unknown. Here, we have studied the role of HISTONE DEACETYLASE 19 (HDA19) in Arabidopsis (Arabidopsis thaliana) during ovule and ReT differentiation based on the observation that the hda19-3 mutant displays a reduced ovule number and fails to differentiate the TT properly. Fluorescence-activated cell sorting coupled with RNA-sequencing revealed that in the CMM of hda19-3 mutants, genes promoting organ development are downregulated while meristematic markers, including STM, are upregulated. HDA19 was essential to downregulate STM in the CMM, thereby allowing ovule formation and TT differentiation. STM is ectopically expressed in hda19-3 at intermediate stages of pistil development, and its downregulation by RNA interference alleviated the hda19-3 phenotype. Chromatin immunoprecipitation assays indicated that STM is a direct target of HDA19 during pistil development and that the transcription factor SEEDSTICK is also required to regulate STM via histone acetylation. Thus, we identified factors required for the downregulation of STM in the CMM, which is necessary for organogenesis and tissue differentiation.
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Affiliation(s)
- Silvia Manrique
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Giovanni Celoria 26, Milan 20133, Italy
| | - Alex Cavalleri
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Giovanni Celoria 26, Milan 20133, Italy
| | - Andrea Guazzotti
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Giovanni Celoria 26, Milan 20133, Italy
| | - Gonzalo H Villarino
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27606, USA
| | - Sara Simonini
- Department of Plant and Microbial Biology & Zurich-Basel Plant Science Center, University of Zurich, Zollikerstrasse 107, Zurich CH-8008, Switzerland
| | - Aureliano Bombarely
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Giovanni Celoria 26, Milan 20133, Italy
| | - Tetsuya Higashiyama
- Institute of Transformative Bio-Molecules (ITbM), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
| | - Ueli Grossniklaus
- Department of Plant and Microbial Biology & Zurich-Basel Plant Science Center, University of Zurich, Zollikerstrasse 107, Zurich CH-8008, Switzerland
| | - Chiara Mizzotti
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Giovanni Celoria 26, Milan 20133, Italy
| | - Ana Marta Pereira
- Faculdade de Ciências da Universidade do Porto, Departamento de Biologia, Universidade do Porto, rua do Campo Alegre, Porto 4169-007, Portugal
- LAQV Requimte, Sustainable Chemistry, Universidade do Porto, Porto 4169-007, Portugal
| | - Silvia Coimbra
- Faculdade de Ciências da Universidade do Porto, Departamento de Biologia, Universidade do Porto, rua do Campo Alegre, Porto 4169-007, Portugal
- LAQV Requimte, Sustainable Chemistry, Universidade do Porto, Porto 4169-007, Portugal
| | - Subramanian Sankaranarayanan
- Department of Biological Sciences and Engineering, Indian Institute of Technology Gandhinagar, Palaj, Gujarat 382355, India
| | - Elisabetta Onelli
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Giovanni Celoria 26, Milan 20133, Italy
| | - Simona Masiero
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Giovanni Celoria 26, Milan 20133, Italy
| | - Robert G Franks
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27606, USA
| | - Lucia Colombo
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Giovanni Celoria 26, Milan 20133, Italy
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6
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Zhi P, Gao R, Chen W, Chang C. Wheat Transcriptional Corepressor TaTPR1 Suppresses Susceptibility Genes TaDND1/2 and Potentiates Post-Penetration Resistance against Blumeria graminis forma specialis tritici. Int J Mol Sci 2024; 25:1695. [PMID: 38338970 PMCID: PMC10855895 DOI: 10.3390/ijms25031695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 01/22/2024] [Accepted: 01/27/2024] [Indexed: 02/12/2024] Open
Abstract
The obligate biotrophic fungal pathogen Blumeria graminis forma specialis tritici (B.g. tritici) is the causal agent of wheat powdery mildew disease. The TOPLESS-related 1 (TPR1) corepressor regulates plant immunity, but its role in regulating wheat resistance against powdery mildew remains to be disclosed. Herein, TaTPR1 was identified as a positive regulator of wheat post-penetration resistance against powdery mildew disease. The transient overexpression of TaTPR1.1 or TaTPR1.2 confers wheat post-penetration resistance powdery mildew, while the silencing of TaTPR1.1 and TaTPR1.2 results in an enhanced wheat susceptibility to B.g. tritici. Furthermore, Defense no Death 1 (TaDND1) and Defense no Death 2 (TaDND2) were identified as wheat susceptibility (S) genes facilitating a B.g. tritici infection. The overexpression of TaDND1 and TaDND2 leads to an enhanced wheat susceptibility to B.g. tritici, while the silencing of wheat TaDND1 and TaDND2 leads to a compromised susceptibility to powdery mildew. In addition, we demonstrated that the expression of TaDND1 and TaDND2 is negatively regulated by the wheat transcriptional corepressor TaTPR1. Collectively, these results implicate that TaTPR1 positively regulates wheat post-penetration resistance against powdery mildew probably via suppressing the S genes TaDND1 and TaDND2.
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Affiliation(s)
| | | | | | - Cheng Chang
- College of Life Sciences, Qingdao University, Qingdao 266071, China
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7
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Aalders TR, de Sain M, Gawehns F, Oudejans N, Jak YD, Dekker HL, Rep M, van den Burg HA, Takken FL. Specific members of the TOPLESS family are susceptibility genes for Fusarium wilt in tomato and Arabidopsis. PLANT BIOTECHNOLOGY JOURNAL 2024; 22:248-261. [PMID: 37822043 PMCID: PMC10754003 DOI: 10.1111/pbi.14183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 07/10/2023] [Accepted: 09/13/2023] [Indexed: 10/13/2023]
Abstract
Vascular wilt diseases caused by Fusarium oxysporum are a major threat to many agriculturally important crops. Genetic resistance is rare and inevitably overcome by the emergence of new races. To identify potentially durable and non-race-specific genetic resistance against Fusarium wilt diseases, we set out to identify effector targets in tomato that mediate susceptibility to the fungus. For this purpose, we used the SIX8 effector protein, an important and conserved virulence factor present in many pathogenic F. oxysporum isolates. Using protein pull-downs and yeast two-hybrid assays, SIX8 was found to interact specifically with two members of the tomato TOPLESS family: TPL1 and TPL2. Loss-of-function mutations in TPL1 strongly reduced disease susceptibility to Fusarium wilt and a tpl1;tpl2 double mutant exerted an even higher level of resistance. Similarly, Arabidopsis tpl;tpr1 mutants became significantly less diseased upon F. oxysporum inoculation as compared to wildtype plants. We conclude that TPLs encode susceptibility genes whose mutation can confer resistance to F. oxysporum.
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Affiliation(s)
- Thomas R. Aalders
- Molecular Plant PathologySwammerdam Institute for Life Sciences (SILS), University of AmsterdamAmsterdamthe Netherlands
| | - Mara de Sain
- Molecular Plant PathologySwammerdam Institute for Life Sciences (SILS), University of AmsterdamAmsterdamthe Netherlands
| | - Fleur Gawehns
- Molecular Plant PathologySwammerdam Institute for Life Sciences (SILS), University of AmsterdamAmsterdamthe Netherlands
| | - Nina Oudejans
- Molecular Plant PathologySwammerdam Institute for Life Sciences (SILS), University of AmsterdamAmsterdamthe Netherlands
| | - Yoran D. Jak
- Molecular Plant PathologySwammerdam Institute for Life Sciences (SILS), University of AmsterdamAmsterdamthe Netherlands
| | - Henk L. Dekker
- Mass Spectrometry of BiomoleculesSwammerdam Institute for Life Sciences (SILS), University of AmsterdamAmsterdamthe Netherlands
| | - Martijn Rep
- Molecular Plant PathologySwammerdam Institute for Life Sciences (SILS), University of AmsterdamAmsterdamthe Netherlands
| | - Harrold A. van den Burg
- Molecular Plant PathologySwammerdam Institute for Life Sciences (SILS), University of AmsterdamAmsterdamthe Netherlands
| | - Frank L.W. Takken
- Molecular Plant PathologySwammerdam Institute for Life Sciences (SILS), University of AmsterdamAmsterdamthe Netherlands
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8
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Xie B, Luo M, Li Q, Shao J, Chen D, Somers DE, Tang D, Shi H. NUA positively regulates plant immunity by coordination with ESD4 to deSUMOylate TPR1 in Arabidopsis. THE NEW PHYTOLOGIST 2024; 241:363-377. [PMID: 37786257 PMCID: PMC10843230 DOI: 10.1111/nph.19287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 09/12/2023] [Indexed: 10/04/2023]
Abstract
Nuclear pore complex (NPC) is composed of multiple nucleoporins (Nups). A plethora of studies have highlighted the significance of NPC in plant immunity. However, the specific roles of individual Nups are poorly understood. NUCLEAR PORE ANCHOR (NUA) is a component of NPC. Loss of NUA leads to an increase in SUMO conjugates and pleiotropic developmental defects in Arabidopsis thaliana. Herein, we revealed that NUA is required for plant defense against multiple pathogens. NUCLEAR PORE ANCHOR associates with the transcriptional corepressor TOPLESS-RELATED1 (TPR1) and contributes to TPR1 deSUMOylation. Significantly, NUA-interacting protein EARLY IN SHORT DAYS 4 (ESD4), a SUMO protease, specifically deSUMOylates TPR1. It has been previously established that the SUMO E3 ligase SAP AND MIZ1 DOMAIN-CONTAINING LIGASE 1 (SIZ1)-mediated SUMOylation of TPR1 represses the immune-related function of TPR1. Consistent with this notion, the hyper-SUMOylated TPR1 in nua-3 leads to upregulated expression of TPR1 target genes and compromised TPR1-mediated disease resistance. Taken together, our work uncovers a mechanism by which NUA positively regulates plant defense responses by coordination with ESD4 to deSUMOylate TPR1. Our findings, together with previous studies, reveal a regulatory module in which SIZ1 and NUA/ESD4 control the homeostasis of TPR1 SUMOylation to maintain proper immune output.
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Affiliation(s)
- Bao Xie
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Mingyu Luo
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Qiuyi Li
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jing Shao
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Desheng Chen
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - David E Somers
- Department of Molecular Genetics, The Ohio State University, Columbus 43210, USA
| | - Dingzhong Tang
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Hua Shi
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China
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Feng W, Zhang H, Cao Y, Liu Y, Zhao Y, Sun F, Yang Q, Zhang X, Zhang Y, Wang Y, Li W, Lu Y, Fu F, Yu H. Maize ZmBES1/BZR1-1 transcription factor negatively regulates drought tolerance. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 205:108188. [PMID: 37979574 DOI: 10.1016/j.plaphy.2023.108188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 10/28/2023] [Accepted: 11/09/2023] [Indexed: 11/20/2023]
Abstract
Drought stress is a common abiotic factor and restricts plant growth and development. Exploring maize stress-related genes and their regulatory mechanisms is crucial for ensuring agricultural productivity and food security. The BRI1-EMS1 suppressor (BES1)/brassinazole-resistant 1 (BZR1) transcription factors (TFs) play important roles in plant growth, development, and stress response. However, maize ZmBES1/BZR1s are rarely reported. In the present study, the ZmBES1/BZR1-1 gene was cloned from maize B73 and functionally characterized in transgenic Arabidopsis and rice in drought stress response. The ZmBES1/BZR1-1 protein possessed a conserved bHLH domain characterized by BES1/BZR1 TFs, localized in the nucleus, and showed transcription activation activity. The expression of ZmBES1/BZR1-1 exhibited no tissue specificity but drought-inhibitory expression in maize. Under drought stress, overexpression of ZmBES1/BZR1-1 resulted in the enhancement of drought sensitivity of transgenic Arabidopsis and rice with a lower survival rate, reactive oxygen species (ROS) level and relative water content (RWC) and a higher stomatal aperture and relative electrolyte leakage (REL). The RNA-seq results showed that 56 differentially expressed genes (DEGs) were regulated by ZmBES1/BZR1-1 by binding to E-box elements in their promoters. The GO analysis showed that the DEGs were significantly annotated with response to oxidative stress and oxygen level. The study suggests that the ZmBES1/BZR1-1 gene negatively regulates drought stress, which provides insights into further underlying molecular mechanisms in the drought stress response mediated by BZR1/BES1s.
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Affiliation(s)
- Wenqi Feng
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Hongwanjun Zhang
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yang Cao
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yuan Liu
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yiran Zhao
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Fuai Sun
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qingqing Yang
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xuecai Zhang
- International Maize and Wheat Improvement Center (CIMMYT), Texcoco, 56237, Mexico
| | - Yuanyuan Zhang
- College of Life Science & Biotechnology, Mianyang Teachers' College, Mianyang, 621000, China
| | - Yingge Wang
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Wanchen Li
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yanli Lu
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Fengling Fu
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China.
| | - Haoqiang Yu
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu, 611130, China.
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10
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Wu Q, Tong C, Chen Z, Huang S, Zhao X, Hong H, Li J, Feng M, Wang H, Xu M, Yan Y, Cui H, Shen D, Ai G, Xu Y, Li J, Zhang H, Huang C, Zhang Z, Dong S, Wang X, Zhu M, Dinesh-Kumar SP, Tao X. NLRs derepress MED10b- and MED7-mediated repression of jasmonate-dependent transcription to activate immunity. Proc Natl Acad Sci U S A 2023; 120:e2302226120. [PMID: 37399403 PMCID: PMC10334756 DOI: 10.1073/pnas.2302226120] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 05/23/2023] [Indexed: 07/05/2023] Open
Abstract
Plant intracellular nucleotide-binding domain, leucine-rich repeat-containing receptors (NLRs) activate a robust immune response upon detection of pathogen effectors. How NLRs induce downstream immune defense genes remains poorly understood. The Mediator complex plays a central role in transducing signals from gene-specific transcription factors to the transcription machinery for gene transcription/activation. In this study, we demonstrate that MED10b and MED7 of the Mediator complex mediate jasmonate-dependent transcription repression, and coiled-coil NLRs (CNLs) in Solanaceae modulate MED10b/MED7 to activate immunity. Using the tomato CNL Sw-5b, which confers resistance to tospovirus, as a model, we found that the CC domain of Sw-5b directly interacts with MED10b. Knockout/down of MED10b and other subunits including MED7 of the middle module of Mediator activates plant defense against tospovirus. MED10b was found to directly interact with MED7, and MED7 directly interacts with JAZ proteins, which function as transcriptional repressors of jasmonic acid (JA) signaling. MED10b-MED7-JAZ together can strongly repress the expression of JA-responsive genes. The activated Sw-5b CC interferes with the interaction between MED10b and MED7, leading to the activation of JA-dependent defense signaling against tospovirus. Furthermore, we found that CC domains of various other CNLs including helper NLR NRCs from Solanaceae modulate MED10b/MED7 to activate defense against different pathogens. Together, our findings reveal that MED10b/MED7 serve as a previously unknown repressor of jasmonate-dependent transcription repression and are modulated by diverse CNLs in Solanaceae to activate the JA-specific defense pathways.
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Affiliation(s)
- Qian Wu
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Cong Tong
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Zhengqiang Chen
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Shen Huang
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Xiaohui Zhao
- Salinity Agriculture Research Laboratory, Jiangsu Coastal Area Institute of Agricultural Sciences, Yancheng224002, P. R. China
| | - Hao Hong
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Jia Li
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Mingfeng Feng
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Huiyuan Wang
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
- Institute of Biotechnology, Zhejiang University, Hangzhou310058, P. R. China
| | - Min Xu
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Yuling Yan
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Hongmin Cui
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Danyu Shen
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Gan Ai
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Yi Xu
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Junming Li
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing100081, P. R. China
| | - Hui Zhang
- Institute of Horticulture Science, Shanghai Academy of Agricultural Sciences, Shanghai201403, P. R. China
| | - Changjun Huang
- Yunnan Academy of Tobacco Agricultural Sciences, Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Kunming650021, P. R. China
| | - Zhongkai Zhang
- Yunnan Provincial Key Laboratory of Agri-Biotechnology, Institute of Biotechnology and Genetic Resources, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan650223, P. R. China
| | - Suomeng Dong
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Xuan Wang
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Min Zhu
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
| | - Savithramma P. Dinesh-Kumar
- Department of Plant Biology and The Genome Center College of Biological Sciences, University of California, Davis, CA95616
| | - Xiaorong Tao
- The Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing210095, P. R. China
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Sun B, Shen Y, Chen S, Shi Z, Li H, Miao X. A novel transcriptional repressor complex MYB22-TOPLESS-HDAC1 promotes rice resistance to brown planthopper by repressing F3'H expression. THE NEW PHYTOLOGIST 2023; 239:720-738. [PMID: 37149887 DOI: 10.1111/nph.18958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 04/13/2023] [Indexed: 05/09/2023]
Abstract
The brown planthopper (BPH) is the most destructive pest of rice. The MYB transcription factors are vital for rice immunity, but most are activators. Although MYB22 positively regulates rice resistance to BPH and has an EAR motif associated with active repression, it remains unclear whether it is a transcriptional repressor affecting rice-BPH interaction. Genetic analyses revealed that MYB22 regulates rice resistance to BPH via its EAR motif. Several biochemical experiments (e.g. transient transcription assay, Y2H, LCA, and BiFC) indicated that MYB22 is a transcriptional repressor that interacts with the corepressor TOPLESS via its EAR motif and recruits HDAC1 to form a tripartite complex. Flavonoid-3'-hydroxylase (F3'H) is a flavonoid biosynthesis pathway-related gene that negatively regulates rice resistance to BPH. Based on a bioinformatics analysis and the results of EMSA and transient transcription assays, MYB22 can bind directly to the F3'H promoter and repress gene expression along with TOPLESS and HDAC1. We revealed a transcriptional regulatory mechanism influencing the rice-BPH interaction that differs from previously reported mechanisms. Specifically, MYB22-TOPLESS-HDAC1 is a novel transcriptional repressor complex with components that synergistically and positively regulate rice resistance to BPH through the transcriptional repression of F3'H.
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Affiliation(s)
- Bo Sun
- CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 200032, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yanjie Shen
- CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 200032, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Su Chen
- CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 200032, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhenying Shi
- CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 200032, Shanghai, China
| | - Haichao Li
- CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 200032, Shanghai, China
| | - Xuexia Miao
- CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 200032, Shanghai, China
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12
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Bielewicz D, Dolata J, Bajczyk M, Szewc L, Gulanicz T, Bhat SS, Karlik A, Jozwiak M, Jarmolowski A, Szweykowska-Kulinska Z. Hyponastic Leaves 1 Interacts with RNA Pol II to Ensure Proper Transcription of MicroRNA Genes. PLANT & CELL PHYSIOLOGY 2023; 64:571-582. [PMID: 37040378 DOI: 10.1093/pcp/pcad032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 03/31/2023] [Accepted: 04/11/2023] [Indexed: 06/16/2023]
Abstract
Hyponastic Leaves 1 (HYL1) [also known as Double-stranded RNA-Binding protein 1 (DRB1)] is a double-stranded RNA-binding protein involved in microRNA (miRNA) processing in plants. It is a core component of the Microprocessor complex and enhances the efficiency and precision of miRNA processing by the Dicer-Like 1 protein. In this work, we report a novel function of the HYL1 protein in the transcription of miRNA (MIR) genes. HYL1 colocalizes with RNA polymerase II and affects its distribution along MIR genes. Moreover, proteomic experiments revealed that the HYL1 protein interacts with many transcription factors. Finally, we show that the action of HYL1 is not limited to MIR genes and impacts the expression of many other genes, a majority of which are involved in plastid organization. These discoveries indicate HYL1 as an additional player in gene regulation at the transcriptional level, independent of its role in miRNA biogenesis.
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Affiliation(s)
- Dawid Bielewicz
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan 61-614, Poland
- Centre for Advanced Technologies, Adam Mickiewicz University, Poznan 61-614, Poland
| | - Jakub Dolata
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan 61-614, Poland
| | - Mateusz Bajczyk
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan 61-614, Poland
| | - Lukasz Szewc
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan 61-614, Poland
| | - Tomasz Gulanicz
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan 61-614, Poland
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Torun 87-100, Poland
| | - Susheel S Bhat
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan 61-614, Poland
| | - Anna Karlik
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan 61-614, Poland
| | - Monika Jozwiak
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan 61-614, Poland
| | - Artur Jarmolowski
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan 61-614, Poland
| | - Zofia Szweykowska-Kulinska
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan 61-614, Poland
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13
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Ao K, Rohmann PFW, Huang S, Li L, Lipka V, Chen S, Wiermer M, Li X. Puncta-localized TRAF domain protein TC1b contributes to the autoimmunity of snc1. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 114:591-612. [PMID: 36799433 DOI: 10.1111/tpj.16155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 02/07/2023] [Indexed: 05/04/2023]
Abstract
Immune receptors play important roles in the perception of pathogens and initiation of immune responses in both plants and animals. Intracellular nucleotide-binding domain leucine-rich repeat (NLR)-type receptors constitute a major class of receptors in vascular plants. In the Arabidopsis thaliana mutant suppressor of npr1-1, constitutive 1 (snc1), a gain-of-function mutation in the NLR gene SNC1 leads to SNC1 overaccumulation and constitutive activation of defense responses. From a CRISPR/Cas9-based reverse genetics screen in the snc1 autoimmune background, we identified that mutations in TRAF CANDIDATE 1b (TC1b), a gene encoding a protein with four tumor necrosis factor receptor-associated factor (TRAF) domains, can suppress snc1 phenotypes. TC1b does not appear to be a general immune regulator as it is not required for defense mediated by other tested immune receptors. TC1b also does not physically associate with SNC1, affect SNC1 accumulation, or affect signaling of the downstream helper NLRs represented by ACTIVATED DISEASE RESISTANCE PROTEIN 1-L2 (ADR1-L2), suggesting that TC1b impacts snc1 autoimmunity in a unique way. TC1b can form oligomers and localizes to punctate structures of unknown function. The puncta localization of TC1b strictly requires its coiled-coil (CC) domain, whereas the functionality of TC1b requires the four TRAF domains in addition to the CC. Overall, we uncovered the TRAF domain protein TC1b as a novel positive contributor to plant immunity.
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Affiliation(s)
- Kevin Ao
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
- Department of Botany, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
| | - Philipp F W Rohmann
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, D-37077, Goettingen, Germany
- Biochemistry of Plant-Microbe Interactions, Dahlem Centre of Plant Sciences, Institute of Biology, Freie Universität Berlin, 14195, Berlin, Germany
| | - Shuai Huang
- Department of Molecular Genetics, College of Arts and Sciences, Ohio State University, Columbus, Ohio, 43210, USA
| | - Lin Li
- National Institute of Biological Sciences, Beijing, 102206, China
| | - Volker Lipka
- Department of Plant Cell Biology, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, D-37077, Goettingen, Germany
- Central Microscopy Facility of the Faculty of Biology and Psychology, University of Goettingen, D-37077, Goettingen, Germany
| | - She Chen
- National Institute of Biological Sciences, Beijing, 102206, China
| | - Marcel Wiermer
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, D-37077, Goettingen, Germany
- Biochemistry of Plant-Microbe Interactions, Dahlem Centre of Plant Sciences, Institute of Biology, Freie Universität Berlin, 14195, Berlin, Germany
| | - Xin Li
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
- Department of Botany, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
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14
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Macioszek VK, Jęcz T, Ciereszko I, Kononowicz AK. Jasmonic Acid as a Mediator in Plant Response to Necrotrophic Fungi. Cells 2023; 12:cells12071027. [PMID: 37048100 PMCID: PMC10093439 DOI: 10.3390/cells12071027] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 03/30/2023] Open
Abstract
Jasmonic acid (JA) and its derivatives, all named jasmonates, are the simplest phytohormones which regulate multifarious plant physiological processes including development, growth and defense responses to various abiotic and biotic stress factors. Moreover, jasmonate plays an important mediator’s role during plant interactions with necrotrophic oomycetes and fungi. Over the last 20 years of research on physiology and genetics of plant JA-dependent responses to pathogens and herbivorous insects, beginning from the discovery of the JA co-receptor CORONATINE INSENSITIVE1 (COI1), research has speeded up in gathering new knowledge on the complexity of plant innate immunity signaling. It has been observed that biosynthesis and accumulation of jasmonates are induced specifically in plants resistant to necrotrophic fungi (and also hemibiotrophs) such as mostly investigated model ones, i.e., Botrytis cinerea, Alternaria brassicicola or Sclerotinia sclerotiorum. However, it has to be emphasized that the activation of JA-dependent responses takes place also during susceptible interactions of plants with necrotrophic fungi. Nevertheless, many steps of JA function and signaling in plant resistance and susceptibility to necrotrophs still remain obscure. The purpose of this review is to highlight and summarize the main findings on selected steps of JA biosynthesis, perception and regulation in the context of plant defense responses to necrotrophic fungal pathogens.
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15
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Bernoux M, Chen J, Zhang X, Newell K, Hu J, Deslandes L, Dodds P. Subcellular localization requirements and specificities for plant immune receptor Toll-interleukin-1 receptor signaling. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023. [PMID: 36932864 DOI: 10.1111/tpj.16195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 02/24/2023] [Accepted: 03/01/2023] [Indexed: 06/02/2023]
Abstract
Recent work shed light on how plant intracellular immune receptors of the nucleotide-binding leucine-rich repeat (NLR) family are activated upon pathogen effector recognition to trigger immune responses. Activation of Toll-interleukin-1 receptor (TIR) domain-containing NLRs (TNLs) induces receptor oligomerization and close proximity of the TIR domain, which is required for TIR enzymatic activity. TIR-catalyzed small signaling molecules bind to EDS1 family heterodimers and subsequently activate downstream helper NLRs, which function as Ca2+ permeable channel to activate immune responses eventually leading to cell death. Subcellular localization requirements of TNLs and signaling partners are not well understood, although they are required to understand fully the mechanisms underlying NLR early signaling. TNLs show diverse subcellular localization while EDS1 shows nucleocytosolic localization. Here, we studied the impact of TIR and EDS1 mislocalization on the signaling activation of different TNLs. In Nicotiana benthamiana, our results suggest that close proximity of TIR domains isolated from flax L6 and Arabidopsis RPS4 and SNC1 TNLs drives signaling activation from different cell compartments. Nevertheless, both Golgi-membrane anchored L6 and nucleocytosolic RPS4 have the same requirements for EDS1 subcellular localization in Arabidopsis thaliana. By using mislocalized variants of EDS1, we found that autoimmune L6 and RPS4 TIR domain can induce seedling cell death when EDS1 is present in the cytosol. However, when EDS1 is restricted to the nucleus, both induce a stunting phenotype but no cell death. Our data point out the importance of thoroughly investigating the dynamics of TNLs and signaling partners subcellular localization to understand TNL signaling fully.
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Affiliation(s)
- Maud Bernoux
- Laboratoire des Interactions Plantes-Microbes-Environnement (LIPME), UMR 2594/441 CNRS, INRAE, 31326, Castanet-Tolosan, France
| | - Jian Chen
- Agriculture and Food, Commonwealth Scientific and Industrial Research Organization, Canberra, ACT 2601, Australia
| | - Xiaoxiao Zhang
- Research School of Biology, Australian National University, Canberra, ACT 2601, Australia
| | - Kim Newell
- Agriculture and Food, Commonwealth Scientific and Industrial Research Organization, Canberra, ACT 2601, Australia
| | - Jian Hu
- Department of Biochemistry and Molecular Biology, College of Biological Sciences, China Agricultural University, Beijing, 100094, People's Republic of China
| | - Laurent Deslandes
- Laboratoire des Interactions Plantes-Microbes-Environnement (LIPME), UMR 2594/441 CNRS, INRAE, 31326, Castanet-Tolosan, France
| | - Peter Dodds
- Agriculture and Food, Commonwealth Scientific and Industrial Research Organization, Canberra, ACT 2601, Australia
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16
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Tran S, Ison M, Ferreira Dias NC, Ortega MA, Chen YFS, Peper A, Hu L, Xu D, Mozaffari K, Severns PM, Yao Y, Tsai CJ, Teixeira PJPL, Yang L. Endogenous salicylic acid suppresses de novo root regeneration from leaf explants. PLoS Genet 2023; 19:e1010636. [PMID: 36857386 PMCID: PMC10010561 DOI: 10.1371/journal.pgen.1010636] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 03/13/2023] [Accepted: 01/25/2023] [Indexed: 03/02/2023] Open
Abstract
Plants can regenerate new organs from damaged or detached tissues. In the process of de novo root regeneration (DNRR), adventitious roots are frequently formed from the wound site on a detached leaf. Salicylic acid (SA) is a key phytohormone regulating plant defenses and stress responses. The role of SA and its acting mechanisms during de novo organogenesis is still unclear. Here, we found that endogenous SA inhibited the adventitious root formation after cutting. Free SA rapidly accumulated at the wound site, which was accompanied by an activation of SA response. SA receptors NPR3 and NPR4, but not NPR1, were required for DNRR. Wounding-elevated SA compromised the expression of AUX1, and subsequent transport of auxin to the wound site. A mutation in AUX1 abolished the enhanced DNRR in low SA mutants. Our work elucidates a role of SA in regulating DNRR and suggests a potential link between biotic stress and tissue regeneration.
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Affiliation(s)
- Sorrel Tran
- Department of Plant Pathology, College of Agricultural & Environmental Sciences, University of Georgia, Athens, Georgia, United States of America
| | - Madalene Ison
- Department of Plant Pathology, College of Agricultural & Environmental Sciences, University of Georgia, Athens, Georgia, United States of America
| | | | - Maria Andrea Ortega
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia, United States of America
- Department of Genetics, Franklin College of Arts and Sciences, University of Georgia, Athens, Georgia, United States of America
- Department of Plant Biology, Franklin College of Arts and Sciences, University of Georgia, Athens, Georgia, United States of America
| | - Yun-Fan Stephanie Chen
- Department of Plant Pathology, College of Agricultural & Environmental Sciences, University of Georgia, Athens, Georgia, United States of America
| | - Alan Peper
- Department of Plant Pathology, College of Agricultural & Environmental Sciences, University of Georgia, Athens, Georgia, United States of America
| | - Lanxi Hu
- Department of Plant Pathology, College of Agricultural & Environmental Sciences, University of Georgia, Athens, Georgia, United States of America
| | - Dawei Xu
- Department of Plant Pathology, College of Agricultural & Environmental Sciences, University of Georgia, Athens, Georgia, United States of America
| | - Khadijeh Mozaffari
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia, United States of America
| | - Paul M. Severns
- Department of Plant Pathology, College of Agricultural & Environmental Sciences, University of Georgia, Athens, Georgia, United States of America
| | - Yao Yao
- Department of Animal and Diary Sciences, College of Agricultural & Environmental Sciences, University of Georgia, Georgia, United States of America
| | - Chung-Jui Tsai
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia, United States of America
- Department of Genetics, Franklin College of Arts and Sciences, University of Georgia, Athens, Georgia, United States of America
- Department of Plant Biology, Franklin College of Arts and Sciences, University of Georgia, Athens, Georgia, United States of America
| | - Paulo José Pereira Lima Teixeira
- Department of Biology, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Sao Paulo, Brazil
- * E-mail: (PJPLT); (LY)
| | - Li Yang
- Department of Plant Pathology, College of Agricultural & Environmental Sciences, University of Georgia, Athens, Georgia, United States of America
- * E-mail: (PJPLT); (LY)
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17
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Wang Z, Yang L, Hua J. The intracellular immune receptor like gene SNC1 is an enhancer of effector-triggered immunity in Arabidopsis. PLANT PHYSIOLOGY 2023; 191:874-884. [PMID: 36449532 PMCID: PMC9922396 DOI: 10.1093/plphys/kiac543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
Plants contain many nucleotide-binding leucine-rich repeat (NLR) proteins that are postulated to function as intracellular immune receptors but do not yet have an identified function during plant-pathogen interactions. SUPPRESSOR OF NPR1-1, CONSTITUTIVE 1 (SNC1) is one such NLR protein of the Toll-interleukin 1 receptor (TIR) type, despite its well-characterized gain-of-function activity and its involvement in autoimmunity in Arabidopsis (Arabidopsis thaliana). Here, we investigated the role of SNC1 in natural plant-pathogen interactions and genetically tested the importance of the enzymatic activities of its TIR domain for its function. The SNC1 loss-of-function mutants were more susceptible to avirulent bacterial pathogen strains of Pseudomonas syringae containing specific effectors, especially under constant light growth condition. The mutants also had reduced defense gene expression induction and hypersensitive responses upon infection by avirulent pathogens under constant light growth condition. In addition, genetic and biochemical studies supported that the TIR enzymatic activity of SNC1 is required for its gain-of-function activity. In sum, our study uncovers the role of SNC1 as an amplifier of plant defense responses during natural plant-pathogen interactions and indicates its use of enzymatic activity and intermolecular interactions for triggering autoimmune responses.
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Affiliation(s)
- Zhixue Wang
- Plant Biology section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA
| | - Leiyun Yang
- Plant Biology section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA
| | - Jian Hua
- Plant Biology section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA
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18
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Yu H, Yang L, Li Z, Sun F, Li B, Guo S, Wang YF, Zhou T, Hua J. In situ deletions reveal regulatory components for expression of an intracellular immune receptor gene and its co-expressed genes in Arabidopsis. PLANT, CELL & ENVIRONMENT 2023; 46:621-634. [PMID: 36368774 DOI: 10.1111/pce.14489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 09/16/2022] [Indexed: 06/16/2023]
Abstract
Intracellular immune receptor nucleotide-binding leucine-rich repeats (NLRs) are highly regulated transcriptionally and post-transcriptionally for balanced plant defence and growth. NLR genes often exist in gene clusters and are usually co-expressed under various conditions. Despite of intensive studies of regulation of NLR proteins, cis-acting elements for NLR gene induction, repression or co-expression are largely unknown due to a larger than usual cis-region for their expression regulation. Here we used the CRISPR/Cas9 genome editing technology to generate a series of in situ deletions at the endogenous location of a NLR gene SNC1 residing in the RPP5 gene cluster. These deletions that made in the wild type and the SNC1 constitutive expressing autoimmune mutant bon1 revealed both positive and negative cis-acting elements for SNC1 expression. Two transcription factors that could bind to these elements were found to have an impact on the expression of SNC1. In addition, co-expression of two genes with SNC1 in the same cluster is found to be mostly dependent on the SNC1 function. Therefore, SNC1 expression is under complex local regulation involving multiple cis elements and SNC1 itself is a critical regulator of gene expression of other NLR genes in the same gene cluster.
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Affiliation(s)
- Huiyun Yu
- Key Laboratory of Food Quality and Safety, Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China
- Plant Biology Section, School Of Integrative Plant Science, Cornell University, Ithaca, New York, USA
| | - Leiyun Yang
- Plant Biology Section, School Of Integrative Plant Science, Cornell University, Ithaca, New York, USA
| | - Zhan Li
- Plant Biology Section, School Of Integrative Plant Science, Cornell University, Ithaca, New York, USA
| | - Feng Sun
- Key Laboratory of Food Quality and Safety, Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China
| | - Bo Li
- Department of Neurosurgery, Huashan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Centre for Brain Science, Fudan University, Shanghai, China
| | - Shengsong Guo
- Plant Biology Section, School Of Integrative Plant Science, Cornell University, Ithaca, New York, USA
| | - Yong-Fei Wang
- National Key Laboratory of Plant Molecular Genetics, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Tong Zhou
- Key Laboratory of Food Quality and Safety, Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China
- International Rice Research Institute and Jiangsu Academy of Agricultural Sciences Joint Laboratory, Nanjing, Jiangsu, China
| | - Jian Hua
- Plant Biology Section, School Of Integrative Plant Science, Cornell University, Ithaca, New York, USA
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19
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Jia H, Zuo Q, Sadeghnezhad E, Zheng T, Chen X, Dong T, Fang J. HDAC19 recruits ERF4 to the MYB5a promoter and diminishes anthocyanin accumulation during grape ripening. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 113:127-144. [PMID: 36423230 DOI: 10.1111/tpj.16040] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 11/04/2022] [Accepted: 11/16/2022] [Indexed: 06/16/2023]
Abstract
DNA acetylation alters the expression of responsive genes during plant development. In grapes (Vitis vinifera), however, little is known about this regulatory mechanism. In the present study, 'Kyoho' grapes treated with trichostatin A (TSA, a deacetylase inhibitor) were used for transcriptome sequencing and quantitative proteomics analysis. We observed that acetylation was associated with anthocyanin accumulation and gene expression. Acetylation positively regulated phenylalanine metabolism and flavonoid biosynthesis pathways. Using omics analysis, we detected an increase in the levels of the AP2/EREBP transcription factor family after TSA treatment, indicating its association with acetylation-deacetylation dynamics in grapes. Furthermore, ethylene response factor 4 (ERF4) physically interacted with VvHDAC19, a histone deacetylase, which synergistically reduced the expression of target genes involved in anthocyanin biosynthesis owing to the binding of VvERF4 to the GCC-box cis-regulatory element in the VvMYB5a promoter. VvHDAC19 and VvERF4 also controlled anthocyanin biosynthesis and accumulation by regulating acetylation levels of histones H3 and H4. Therefore, alterations in histone modification can significantly regulate the expression of genes involved in anthocyanin biosynthesis and affect grape ripening.
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Affiliation(s)
- Haifeng Jia
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, 1st Weigang Rd., Nanjing, 210095, China
- NJAU (Suqian) Academy of Protected Horticultures, Suqian, China
| | - Qianqian Zuo
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, 1st Weigang Rd., Nanjing, 210095, China
| | - Ehsan Sadeghnezhad
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, 1st Weigang Rd., Nanjing, 210095, China
| | - Ting Zheng
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, 1st Weigang Rd., Nanjing, 210095, China
| | - Xueqin Chen
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, 1st Weigang Rd., Nanjing, 210095, China
| | - Tianyu Dong
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, 1st Weigang Rd., Nanjing, 210095, China
| | - JinggGui Fang
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, 1st Weigang Rd., Nanjing, 210095, China
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20
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Waheed A, Haxim Y, Islam W, Kahar G, Liu X, Zhang D. Role of pathogen's effectors in understanding host-pathogen interaction. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2022; 1869:119347. [PMID: 36055522 DOI: 10.1016/j.bbamcr.2022.119347] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 08/16/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Pathogens can pose challenges to plant growth and development at various stages of their life cycle. Two interconnected defense strategies prevent the growth of pathogens in plants, i.e., molecular patterns triggered immunity (PTI) and pathogenic effector-triggered immunity (ETI) that often provides resistance when PTI no longer functions as a result of pathogenic effectors. Plants may trigger an ETI defense response by directly or indirectly detecting pathogen effectors via their resistance proteins. A typical resistance protein is a nucleotide-binding receptor with leucine-rich sequences (NLRs) that undergo structural changes as they recognize their effectors and form associations with other NLRs. As a result of dimerization or oligomerization, downstream components activate "helper" NLRs, resulting in a response to ETI. It was thought that ETI is highly dependent on PTI. However, recent studies have found that ETI and PTI have symbiotic crosstalk, and both work together to create a robust system of plant defense. In this article, we have summarized the recent advances in understanding the plant's early immune response, its components, and how they cooperate in innate defense mechanisms. Moreover, we have provided the current perspective on engineering strategies for crop protection based on up-to-date knowledge.
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Affiliation(s)
- Abdul Waheed
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology & Geography, Chinese Academy of Sciences, Urumqi 830011, China; Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan 838008, China
| | - Yakupjan Haxim
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology & Geography, Chinese Academy of Sciences, Urumqi 830011, China; Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan 838008, China
| | - Waqar Islam
- Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology & Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Gulnaz Kahar
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology & Geography, Chinese Academy of Sciences, Urumqi 830011, China; Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan 838008, China
| | - Xiaojie Liu
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology & Geography, Chinese Academy of Sciences, Urumqi 830011, China; Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan 838008, China
| | - Daoyuan Zhang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology & Geography, Chinese Academy of Sciences, Urumqi 830011, China; Turpan Eremophytes Botanical Garden, Chinese Academy of Sciences, Turpan 838008, China.
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21
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Bindics J, Khan M, Uhse S, Kogelmann B, Baggely L, Reumann D, Ingole KD, Stirnberg A, Rybecky A, Darino M, Navarrete F, Doehlemann G, Djamei A. Many ways to TOPLESS - manipulation of plant auxin signalling by a cluster of fungal effectors. THE NEW PHYTOLOGIST 2022; 236:1455-1470. [PMID: 35944559 DOI: 10.1111/nph.18315] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Plant biotrophic pathogens employ secreted molecules, called effectors, to suppress the host immune system and redirect the host's metabolism and development in their favour. Putative effectors of the gall-inducing maize pathogenic fungus Ustilago maydis were analysed for their ability to induce auxin signalling in plants. Using genetic, biochemical, cell-biological, and bioinformatic approaches we functionally elucidate a set of five, genetically linked effectors, called Topless (TPL) interacting protein (Tips) effectors that induce auxin signalling. We show that Tips induce auxin signalling by interfering with central corepressors of the TPL family. CRISPR-Cas9 mutants and deletion strain analysis indicate that the auxin signalling inducing subcluster effectors plays a redundant role in virulence. Although none of the Tips seem to have a conserved interaction motif, four of them bind solely to the N-terminal TPL domain and, for Tip1 and Tip4, we demonstrate direct competition with auxin/indole-3-acetic acid transcriptional repressors for their binding to TPL class of corepressors. Our findings reveal that TPL proteins, key regulators of growth-defence antagonism, are a major target of the U. maydis effectome.
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Affiliation(s)
- Janos Bindics
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna Bio Center (VBC), Dr. Bohr-Gasse 3, 1030, Vienna, Austria
| | - Mamoona Khan
- Department of Plant Pathology, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Nussallee 9, 53115, Bonn, Germany
| | - Simon Uhse
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna Bio Center (VBC), Dr. Bohr-Gasse 3, 1030, Vienna, Austria
| | - Benjamin Kogelmann
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna Bio Center (VBC), Dr. Bohr-Gasse 3, 1030, Vienna, Austria
| | - Laura Baggely
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna Bio Center (VBC), Dr. Bohr-Gasse 3, 1030, Vienna, Austria
| | - Daniel Reumann
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna Bio Center (VBC), Dr. Bohr-Gasse 3, 1030, Vienna, Austria
| | - Kishor D Ingole
- Department of Plant Pathology, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Nussallee 9, 53115, Bonn, Germany
| | - Alexandra Stirnberg
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna Bio Center (VBC), Dr. Bohr-Gasse 3, 1030, Vienna, Austria
| | - Anna Rybecky
- CEPLAS, Institute for Plant Sciences, University of Cologne, 50674, Cologne, Germany
| | - Martin Darino
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna Bio Center (VBC), Dr. Bohr-Gasse 3, 1030, Vienna, Austria
| | - Fernando Navarrete
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna Bio Center (VBC), Dr. Bohr-Gasse 3, 1030, Vienna, Austria
| | - Gunther Doehlemann
- CEPLAS, Institute for Plant Sciences, University of Cologne, 50674, Cologne, Germany
| | - Armin Djamei
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna Bio Center (VBC), Dr. Bohr-Gasse 3, 1030, Vienna, Austria
- Department of Plant Pathology, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Nussallee 9, 53115, Bonn, Germany
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), OT Gatersleben, Corrensstraße 3, D-06466, Stadt Seeland, Germany
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22
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Lüdke D, Yan Q, Rohmann PFW, Wiermer M. NLR we there yet? Nucleocytoplasmic coordination of NLR-mediated immunity. THE NEW PHYTOLOGIST 2022; 236:24-42. [PMID: 35794845 DOI: 10.1111/nph.18359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 06/07/2022] [Indexed: 06/15/2023]
Abstract
Plant intracellular nucleotide-binding leucine-rich repeat immune receptors (NLRs) perceive the activity of pathogen-secreted effector molecules that, when undetected, promote colonisation of hosts. Signalling from activated NLRs converges with and potentiates downstream responses from activated pattern recognition receptors (PRRs) that sense microbial signatures at the cell surface. Efficient signalling of both receptor branches relies on the host cell nucleus as an integration point for transcriptional reprogramming, and on the macromolecular transport processes that mediate the communication between cytoplasm and nucleoplasm. Studies on nuclear pore complexes (NPCs), the nucleoporin proteins (NUPs) that compose NPCs, and nuclear transport machinery constituents that control nucleocytoplasmic transport, have revealed that they play important roles in regulating plant immune responses. Here, we discuss the contributions of nucleoporins and nuclear transport receptor (NTR)-mediated signal transduction in plant immunity with an emphasis on NLR immune signalling across the nuclear compartment boundary and within the nucleus. We also highlight and discuss cytoplasmic and nuclear functions of NLRs and their signalling partners and further consider the potential implications of NLR activation and resistosome formation in both cellular compartments for mediating plant pathogen resistance and programmed host cell death.
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Affiliation(s)
- Daniel Lüdke
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Qiqi Yan
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Philipp F W Rohmann
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Marcel Wiermer
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
- Biochemistry of Plant-Microbe Interactions, Dahlem Centre of Plant Sciences, Institute of Biology, Freie Universität Berlin, Königin-Luise-Str. 12-16, 14195, Berlin, Germany
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23
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Kufel J, Diachenko N, Golisz A. Alternative splicing as a key player in the fine-tuning of the immunity response in Arabidopsis. MOLECULAR PLANT PATHOLOGY 2022; 23:1226-1238. [PMID: 35567423 PMCID: PMC9276941 DOI: 10.1111/mpp.13228] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 04/11/2022] [Accepted: 04/13/2022] [Indexed: 06/01/2023]
Abstract
Plants, like animals, are constantly exposed to abiotic and biotic stresses, which often inhibit plant growth and development, and cause tissue damage, disease, and even plant death. Efficient and timely response to stress requires appropriate co- and posttranscriptional reprogramming of gene expression. Alternative pre-mRNA splicing provides an important layer of this regulation by controlling the level of factors involved in stress response and generating additional protein isoforms with specific features. Recent high-throughput studies have revealed that several defence genes undergo alternative splicing that is often affected by pathogen infection. Despite extensive work, the exact mechanisms underlying these relationships are still unclear, but the contribution of alternative protein isoforms to the defence response and the role of regulatory factors, including components of the splicing machinery, have been established. Modulation of gene expression in response to stress includes alternative splicing, chromatin remodelling, histone modifications, and nucleosome occupancy. How these processes affect plant immunity is mostly unknown, but these facets open new regulatory possibilities. Here we provide an overview of the current state of knowledge and recent findings regarding the growing importance of alternative splicing in plant response to biotic stress.
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Affiliation(s)
- Joanna Kufel
- Institute of Genetics and BiotechnologyFaculty of BiologyUniversity of WarsawWarsawPoland
| | - Nataliia Diachenko
- Institute of Genetics and BiotechnologyFaculty of BiologyUniversity of WarsawWarsawPoland
| | - Anna Golisz
- Institute of Genetics and BiotechnologyFaculty of BiologyUniversity of WarsawWarsawPoland
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24
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An C, Deng L, Zhai H, You Y, Wu F, Zhai Q, Goossens A, Li C. Regulation of jasmonate signaling by reversible acetylation of TOPLESS in Arabidopsis. MOLECULAR PLANT 2022; 15:1329-1346. [PMID: 35780296 DOI: 10.1016/j.molp.2022.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 04/28/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
The plant hormone jasmonate (JA) regulates plant immunity and adaptive growth by orchestrating a genome-wide transcriptional program. Key regulators of JA-responsive gene expression include the master transcription factor MYC2, which is repressed by the conserved Groucho/Tup1-like corepressor TOPLESS (TPL) in the resting state. However, the mechanisms underlying TPL-mediated transcriptional repression of MYC2 activity and hormone-dependent switching between repression and de-repression remain enigmatic. Here, we report the regulation of TPL activity and JA signaling by reversible acetylation of TPL. We found that the histone acetyltransferase GCN5 could mediate TPL acetylation, which enhances its interaction with the NOVEL-INTERACTOR-OF-JAZ (NINJA) adaptor and promotes its recruitment to MYC2 target promoters, facilitating transcriptional repression. Conversely, TPL deacetylation by the histone deacetylase HDA6 weakens TPL-NINJA interaction and inhibits TPL recruitment to MYC2 target promoters, facilitating transcriptional activation. In the resting state, the opposing activities of GCN5 and HDA6 maintain TPL acetylation homeostasis, promoting transcriptional repression activity of TPL. In response to JA elicitation, HDA6 expression is transiently induced, resulted in decreased TPL acetylation and repressor activity, thereby transcriptional activation of MYC2 target genes. Thus, the GCN5-TPL-HDA6 module maintains the homeostasis of acetylated TPL, thereby determining the transcriptional state of JA-responsive genes. Our findings uncovered a mechanism by which the TPL corepressor activity in JA signaling is actively tuned in a rapid and reversible manner.
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Affiliation(s)
- Chunpeng An
- State Key Laboratory of Plant Genomics, National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Innovation Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China; CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lei Deng
- State Key Laboratory of Plant Genomics, National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Innovation Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China; CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huawei Zhai
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an 271018, China
| | - Yanrong You
- State Key Laboratory of Plant Genomics, National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Innovation Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China; CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fangming Wu
- State Key Laboratory of Plant Genomics, National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Innovation Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China; CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qingzhe Zhai
- State Key Laboratory of Plant Genomics, National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Innovation Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China; CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Alain Goossens
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052 Ghent, Belgium; VIB Center for Plant Systems Biology, Technologiepark 71, 9052 Ghent, Belgium
| | - Chuanyou Li
- State Key Laboratory of Plant Genomics, National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Innovation Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101, China; CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an 271018, China.
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25
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Yu H, Yang L, Li Z, Sun F, Li B, Guo S, Wang YF, Zhou T, Hua J. In situ deletions reveal regulatory components for expression of an intracellular immune receptor gene and its co-expressed genes in Arabidopsis. PLANT, CELL & ENVIRONMENT 2022; 45:1862-1875. [PMID: 35150136 DOI: 10.1111/pce.14293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/19/2022] [Accepted: 02/01/2022] [Indexed: 06/14/2023]
Abstract
Intracellular immune receptor nucleotide-binding leucine-rich repeats (NLRs) are highly regulated transcriptionally and post-transcriptionally for balanced plant defense and growth. NLR genes often exist in gene clusters and are usually co-expressed under various conditions. Despite intensive studies of the regulation of NLR proteins, cis-acting elements for NLR gene induction, repression or co-expression are largely unknown due to a larger than usual cis-region for their expression regulation. Here we used the CRISPR/Cas9 genome editing technology to generate a series of in situ deletions at the endogenous location of an NLR gene SNC1 residing in the RPP5 gene cluster. These deletions that made in the wild type and the SNC1 constitutive expressing autoimmune mutant bon1 revealed both positive and negative cis-acting elements for SNC1 expression. Two transcription factors that could bind to these elements were found to have an impact on the expression of SNC1. In addition, co-expression of two genes with SNC1 in the same cluster is found to be mostly dependent on the SNC1 function. Therefore, SNC1 expression is under complex local regulation involving multiple cis-elements and SNC1 itself is a critical regulator of gene expression of other NLR genes in the same gene cluster.
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Affiliation(s)
- Huiyun Yu
- Key Laboratory of Food Quality and Safety, Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu Province, China
- School of Integrative Plant Science, Plant Biology Section, Cornell University, Ithaca, New York, USA
| | - Leiyun Yang
- School of Integrative Plant Science, Plant Biology Section, Cornell University, Ithaca, New York, USA
| | - Zhan Li
- School of Integrative Plant Science, Plant Biology Section, Cornell University, Ithaca, New York, USA
| | - Feng Sun
- Key Laboratory of Food Quality and Safety, Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu Province, China
| | - Bo Li
- Department of Neurosurgery, Huashan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China
| | - Shengsong Guo
- School of Integrative Plant Science, Plant Biology Section, Cornell University, Ithaca, New York, USA
| | - Yong-Fei Wang
- National Key Laboratory of Plant Molecular Genetics, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Tong Zhou
- Key Laboratory of Food Quality and Safety, Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu Province, China
- International Rice Research Institute and Jiangsu Academy of Agricultural Sciences Joint Laboratory, Nanjing, Jiangsu Province, China
| | - Jian Hua
- School of Integrative Plant Science, Plant Biology Section, Cornell University, Ithaca, New York, USA
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Vonapartis E, Mohamed D, Li J, Pan W, Wu J, Gazzarrini S. CBF4/DREB1D represses XERICO to attenuate ABA, osmotic and drought stress responses in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 110:961-977. [PMID: 35199890 DOI: 10.1111/tpj.15713] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 01/29/2022] [Accepted: 02/12/2022] [Indexed: 05/22/2023]
Abstract
Water stress can severely impact plant growth, productivity and yield. Consequently, plants have evolved various strategies through which they can respond and adapt to their environment. XERICO (XER) is a stress-responsive RING E3 ubiquitin ligase that modulates abscisic acid (ABA) levels and promotes drought tolerance when overexpressed. To better understand the biological role of XER in stress responses, we characterized a xer-1 hypomorphic mutant and a CRISPR/Cas9-induced xer-2 null mutant in Arabidopsis. Both xer mutant alleles exhibited increased drought sensitivity, supporting the results from overexpression studies. Furthermore, we discovered that both xer mutants have greater stomatal indices and that XER is expressed in epidermal cells, indicating that XER functions in the epidermis to repress stomatal development. To explore XER spatiotemporal and stress-dependent regulation, we conducted a yeast one-hybrid screen and found that CBF4/DREB1D associates with the XER 5' untranslated region (5'-UTR). We generated three cbf4 null mutants with CRISPR/Cas9 and showed that CBF4 negatively regulates ABA responses, promotes stomatal development and reduces drought tolerance, in contrast to the roles shown for XER. CBF4 is induced by ABA and osmotic stress, and localizes to the nucleus where it downregulates XER expression via the DRE element in its 5'-UTR. Lastly, genetic interaction studies confirmed that xer is epistatic to cbf4 in stomatal development and in ABA, osmotic and drought stress responses. We propose that the repression of XER by CBF4 functions to attenuate ABA signaling and stress responses to maintain a balance between plant growth and survival under adverse environmental conditions.
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Affiliation(s)
- Eliana Vonapartis
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada
- Department of Cell and Systems Biology, University of Toronto, 25 Willcocks Street, Toronto, ON, M5S 3B2, Canada
| | - Deka Mohamed
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada
- Department of Cell and Systems Biology, University of Toronto, 25 Willcocks Street, Toronto, ON, M5S 3B2, Canada
| | - Jingru Li
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Wenqiang Pan
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Jian Wu
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Sonia Gazzarrini
- Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada
- Department of Cell and Systems Biology, University of Toronto, 25 Willcocks Street, Toronto, ON, M5S 3B2, Canada
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Saini R, Nandi AK. TOPLESS in the regulation of plant immunity. PLANT MOLECULAR BIOLOGY 2022; 109:1-12. [PMID: 35347548 DOI: 10.1007/s11103-022-01258-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
This review presents the multiple ways how topless and topless-related proteins regulate defense activation in plants and help in optimizing the defense-growth tradeoff. Eukaryotic gene expression is tightly regulated at various levels by hormones, transcription regulators, post-translational modifications, and transcriptional coregulators. TOPLESS (TPL)/TOPLESS-related (TPR) corepressors regulate gene expression by interacting with other transcription factors. TPRs regulate auxin, gibberellins, jasmonic acid, strigolactone, and brassinosteroid signaling in plants. In general, except for GA, TPLs suppress these signaling pathways to prevent unwanted activation of hormone signaling. The association of TPL/TPRs in these hormonal signaling reflects a wide role of this class of corepressors in plants' normal and stress physiology. The involvement of TPL in immune responses was first demonstrated a decade ago as a repressor of DND1 and DND2 that are negative regulators of plant immune response. Over the last decade, several research groups have established a larger role of TPL/TPRs in plant immunity during both pattern- and effector-triggered immunity. Very recent research unraveled the significant involvement of TPRs in balancing the growth and defense trade-off. TPRs, along with proteasomal degradation complex, miRNA, and phasiRNA, suppress the activation of autoimmunity in plants under normal conditions and promote defense under pathogen attack.
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Affiliation(s)
- Reena Saini
- 415, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Ashis Kumar Nandi
- 415, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India.
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Navarrete F, Gallei M, Kornienko AE, Saado I, Khan M, Chia KS, Darino MA, Bindics J, Djamei A. TOPLESS promotes plant immunity by repressing auxin signaling and is targeted by the fungal effector Naked1. PLANT COMMUNICATIONS 2022; 3:100269. [PMID: 35529945 PMCID: PMC9073326 DOI: 10.1016/j.xplc.2021.100269] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 10/21/2021] [Accepted: 11/21/2021] [Indexed: 05/05/2023]
Abstract
In plants, the antagonism between growth and defense is hardwired by hormonal signaling. The perception of pathogen-associated molecular patterns (PAMPs) from invading microorganisms inhibits auxin signaling and plant growth. Conversely, pathogens manipulate auxin signaling to promote disease, but how this hormone inhibits immunity is not fully understood. Ustilago maydis is a maize pathogen that induces auxin signaling in its host. We characterized a U. maydis effector protein, Naked1 (Nkd1), that is translocated into the host nucleus. Through its native ethylene-responsive element binding factor-associated amphiphilic repression (EAR) motif, Nkd1 binds to the transcriptional co-repressors TOPLESS/TOPLESS-related (TPL/TPRs) and prevents the recruitment of a transcriptional repressor involved in hormonal signaling, leading to the de-repression of auxin and jasmonate signaling and thereby promoting susceptibility to (hemi)biotrophic pathogens. A moderate upregulation of auxin signaling inhibits the PAMP-triggered reactive oxygen species (ROS) burst, an early defense response. Thus, our findings establish a clear mechanism for auxin-induced pathogen susceptibility. Engineered Nkd1 variants with increased expression or increased EAR-mediated TPL/TPR binding trigger typical salicylic-acid-mediated defense reactions, leading to pathogen resistance. This implies that moderate binding of Nkd1 to TPL is a result of a balancing evolutionary selection process to enable TPL manipulation while avoiding host recognition.
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Affiliation(s)
- Fernando Navarrete
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna BioCenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Michelle Gallei
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna BioCenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Aleksandra E. Kornienko
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna BioCenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Indira Saado
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), OT Gatersleben, Corrensstraße 3, 06466 Stadt Seeland, Germany
| | - Mamoona Khan
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), OT Gatersleben, Corrensstraße 3, 06466 Stadt Seeland, Germany
| | - Khong-Sam Chia
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), OT Gatersleben, Corrensstraße 3, 06466 Stadt Seeland, Germany
| | - Martin A. Darino
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna BioCenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Janos Bindics
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna BioCenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Armin Djamei
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences (OEAW), Vienna BioCenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), OT Gatersleben, Corrensstraße 3, 06466 Stadt Seeland, Germany
- Corresponding author
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Pirrello C, Malacarne G, Moretto M, Lenzi L, Perazzolli M, Zeilmaker T, Van den Ackerveken G, Pilati S, Moser C, Giacomelli L. Grapevine DMR6-1 Is a Candidate Gene for Susceptibility to Downy mildew. Biomolecules 2022; 12:biom12020182. [PMID: 35204683 PMCID: PMC8961545 DOI: 10.3390/biom12020182] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 11/16/2022] Open
Abstract
Grapevine (Vitis vinifera) is a valuable crop in Europe for both economical and cultural reasons, but highly susceptible to Downy mildew (DM). The generation of resistant vines is of critical importance for a sustainable viticulture and can be achieved either by introgression of resistance genes in susceptible varieties or by mutation of Susceptibility (S) genes, e.g., by gene editing. This second approach offers several advantages: it maintains the genetic identity of cultivars otherwise disrupted by crossing and generally results in a broad-spectrum and durable resistance, but it is hindered by the poor knowledge about S genes in grapevines. Candidate S genes are Downy mildew Resistance 6 (DMR6) and DMR6-Like Oxygenases (DLOs), whose mutations confer resistance to DM in Arabidopsis. In this work, we show that grapevine VviDMR6-1 complements the Arabidopsis dmr6-1 resistant mutant. We studied the expression of grapevine VviDMR6 and VviDLO genes in different organs and in response to the DM causative agent Plasmopara viticola. Through an automated evaluation of causal relationships among genes, we show that VviDMR6-1, VviDMR6-2, and VviDLO1 group into different co-regulatory networks, suggesting distinct functions, and that mostly VviDMR6-1 is connected with pathogenesis-responsive genes. Therefore, VviDMR6-1 represents a good candidate to produce resistant cultivars with a gene-editing approach.
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Affiliation(s)
- Carlotta Pirrello
- Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38098 San Michele all’Adige, Italy; (C.P.); (G.M.); (M.M.); (L.L.); (M.P.); (S.P.); (C.M.)
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 206, 33100 Udine, Italy
| | - Giulia Malacarne
- Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38098 San Michele all’Adige, Italy; (C.P.); (G.M.); (M.M.); (L.L.); (M.P.); (S.P.); (C.M.)
| | - Marco Moretto
- Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38098 San Michele all’Adige, Italy; (C.P.); (G.M.); (M.M.); (L.L.); (M.P.); (S.P.); (C.M.)
| | - Luisa Lenzi
- Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38098 San Michele all’Adige, Italy; (C.P.); (G.M.); (M.M.); (L.L.); (M.P.); (S.P.); (C.M.)
| | - Michele Perazzolli
- Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38098 San Michele all’Adige, Italy; (C.P.); (G.M.); (M.M.); (L.L.); (M.P.); (S.P.); (C.M.)
- Center Agriculture Food Environment (C3A), University of Trento, Via E. Mach 1, 38098 San Michele all’Adige, Italy
| | - Tieme Zeilmaker
- SciENZA Biotechnologies B.V., Sciencepark 904, 1098 XH Amsterdam, The Netherlands;
| | - Guido Van den Ackerveken
- Plant-Microbe Interactions, Department of Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands;
| | - Stefania Pilati
- Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38098 San Michele all’Adige, Italy; (C.P.); (G.M.); (M.M.); (L.L.); (M.P.); (S.P.); (C.M.)
| | - Claudio Moser
- Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38098 San Michele all’Adige, Italy; (C.P.); (G.M.); (M.M.); (L.L.); (M.P.); (S.P.); (C.M.)
| | - Lisa Giacomelli
- Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38098 San Michele all’Adige, Italy; (C.P.); (G.M.); (M.M.); (L.L.); (M.P.); (S.P.); (C.M.)
- Correspondence:
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30
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McGee R, Dean GH, Wu D, Zhang Y, Mansfield SD, Haughn GW. Pectin Modification in Seed Coat Mucilage by In Vivo Expression of Rhamnogalacturonan-I- and Homogalacturonan-Degrading Enzymes. PLANT & CELL PHYSIOLOGY 2021; 62:1912-1926. [PMID: 34059917 DOI: 10.1093/pcp/pcab077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 04/23/2021] [Accepted: 05/31/2021] [Indexed: 05/27/2023]
Abstract
The cell wall is essential for plant survival. Determining the relationship between cell wall structure and function using mutant analysis or overexpressing cell wall-modifying enzymes has been challenging due to the complexity of the cell wall and the appearance of secondary, compensatory effects when individual polymers are modified. In addition, viability of the plants can be severely impacted by wall modification. A useful model system for studying structure-function relationships among extracellular matrix components is the seed coat epidermal cells of Arabidopsis thaliana. These cells synthesize relatively simple, easily accessible, pectin-rich mucilage that is not essential for plant viability. In this study, we expressed enzymes predicted to modify polysaccharide components of mucilage in the apoplast of seed coat epidermal cells and explored their impacts on mucilage. The seed coat epidermal-specific promoter TESTA ABUNDANT2 (TBA2) was used to drive expression of these enzymes to avoid adverse effects in other parts of the plant. Mature transgenic seeds expressing Rhamnogalacturonate lyase A (RglA) or Rhamnogalacturonate lyase B (RglB) that degrade the pectin rhamnogalacturonan-I (RG-I), a major component of mucilage, had greatly reduced mucilage capsules surrounding the seeds and concomitant decreases in the monosaccharides that comprise the RG-I backbone. Degradation of the minor mucilage component homogalacturonan (HG) using the HG-degrading enzymes Pectin lyase A (PLA) or ARABIDOPSIS DEHISCENCE ZONE POLYGALACTURONASE2 (ADPG2) resulted in developing seed coat epidermal cells with disrupted cell-cell adhesion and signs of early cell death. These results demonstrate the feasibility of manipulating the seed coat epidermal cell extracellular matrix using a targeted genetic engineering approach.
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Affiliation(s)
- Robert McGee
- Department of Botany, University of British Columbia, 6270 University Blvd., Vancouver, BC V6T 1Z4, Canada
- L'Institut National de la Recherche Scientifique Centre Armand-Frappier Santé Biotechnologie (INRS-CAFSB), 531 des Prairies Blvd. Laval, QC, H7V 1B7, Canada
| | - Gillian H Dean
- Department of Botany, University of British Columbia, 6270 University Blvd., Vancouver, BC V6T 1Z4, Canada
| | - Di Wu
- Department of Botany, University of British Columbia, 6270 University Blvd., Vancouver, BC V6T 1Z4, Canada
- Faculty of Land and Food Systems, University of British Columbia, 248-2357 Main Mall Vancouver, BC V6T 1Z4, Canada
| | - Yuelin Zhang
- Department of Botany, University of British Columbia, 6270 University Blvd., Vancouver, BC V6T 1Z4, Canada
| | - Shawn D Mansfield
- Department of Wood Science, University of British Columbia, 2900-2424 Main Mall Vancouver, BC V6T 1Z4, Canada
| | - George W Haughn
- Department of Botany, University of British Columbia, 6270 University Blvd., Vancouver, BC V6T 1Z4, Canada
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31
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Ding P, Sakai T, Krishna Shrestha R, Manosalva Perez N, Guo W, Ngou BPM, He S, Liu C, Feng X, Zhang R, Vandepoele K, MacLean D, Jones JDG. Chromatin accessibility landscapes activated by cell-surface and intracellular immune receptors. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:7927-7941. [PMID: 34387350 DOI: 10.1093/jxb/erab373] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 08/12/2021] [Indexed: 06/13/2023]
Abstract
Activation of cell-surface and intracellular receptor-mediated immunity results in rapid transcriptional reprogramming that underpins disease resistance. However, the mechanisms by which co-activation of both immune systems lead to transcriptional changes are not clear. Here, we combine RNA-seq and ATAC-seq to define changes in gene expression and chromatin accessibility. Activation of cell-surface or intracellular receptor-mediated immunity, or both, increases chromatin accessibility at induced defence genes. Analysis of ATAC-seq and RNA-seq data combined with publicly available information on transcription factor DNA-binding motifs enabled comparison of individual gene regulatory networks activated by cell-surface or intracellular receptor-mediated immunity, or by both. These results and analyses reveal overlapping and conserved transcriptional regulatory mechanisms between the two immune systems.
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Affiliation(s)
- Pingtao Ding
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK
- Institute of Biology Leiden, Leiden University, Sylviusweg 72, Leiden 2333 BE, The Netherlands
| | - Toshiyuki Sakai
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK
| | - Ram Krishna Shrestha
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK
| | - Nicolas Manosalva Perez
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052 Ghent, Belgium
- VIB Center for Plant Systems Biology, Technologiepark 71, 9052 Ghent, Belgium
| | - Wenbin Guo
- Information and Computational Sciences, The James Hutton Institute, Dundee DD2 5DA, UK
| | - Bruno Pok Man Ngou
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK
| | - Shengbo He
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Chang Liu
- Institute of Biology, University of Hohenheim, Garbenstrasse 30, 70599 Stuttgart, Germany
| | - Xiaoqi Feng
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Runxuan Zhang
- Information and Computational Sciences, The James Hutton Institute, Dundee DD2 5DA, UK
| | - Klaas Vandepoele
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052 Ghent, Belgium
- VIB Center for Plant Systems Biology, Technologiepark 71, 9052 Ghent, Belgium
| | - Dan MacLean
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK
| | - Jonathan D G Jones
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK
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32
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Yu M, Zhou Z, Liu X, Yin D, Li D, Zhao X, Li X, Li S, Chen R, Lu L, Yang D, Tang D, Zhu L. The OsSPK1-OsRac1-RAI1 defense signaling pathway is shared by two distantly related NLR proteins in rice blast resistance. PLANT PHYSIOLOGY 2021; 187:2852-2864. [PMID: 34597396 PMCID: PMC8644225 DOI: 10.1093/plphys/kiab445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 08/23/2021] [Indexed: 06/09/2023]
Abstract
Resistance (R) proteins are important components of plant innate immunity. Most known R proteins are nucleotide-binding site leucine-rich repeat (NLR) proteins. Although a number of signaling components downstream of NLRs have been identified, we lack a general understanding of the signaling pathways. Here, we used the interaction between rice (Oryza sativa) and Magnaporthe oryzae to study signaling of rice NLRs in response to blast infection. We found that in blast resistance mediated by the NLR PIRICULARIA ORYZAE RESISTANCE IN DIGU 3 (PID3), the guanine nucleotide exchange factor OsSPK1 works downstream of PID3. OsSPK1 activates the small GTPase OsRac1, which in turn transduces the signal to the transcription factor RAC IMMUNITY1 (RAI1). Further investigation revealed that the three signaling components also play important roles in disease resistance mediated by the distantly related NLR protein Pi9, suggesting that the OsSPK1-OsRac1-RAI1 signaling pathway could be conserved across rice NLR-induced blast resistance. In addition, we observed changes in RAI1 levels during blast infection, which led to identification of OsRPT2a, a subunit of the 19S regulatory particle of the 26S proteasome. OsRPT2a seemed to be responsible for RAI1 turnover in a 26S proteasome-dependent manner. Collectively, our results suggest a defense signaling route that might be common to NLR proteins in response to blast infection.
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Affiliation(s)
- Minxiang Yu
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
- State Key Laboratory of Plant Genomics and National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350019, China
| | - Zhuangzhi Zhou
- State Key Laboratory of Plant Genomics and National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xue Liu
- State Key Laboratory of Plant Genomics and National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
- National Engineering Research Center for Vegetables, Beijing Vegetable Research Center, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
| | - Dedong Yin
- State Key Laboratory of Plant Genomics and National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Dayong Li
- State Key Laboratory of Plant Genomics and National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
- National Engineering Research Center for Vegetables, Beijing Vegetable Research Center, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
| | - Xianfeng Zhao
- State Key Laboratory of Plant Genomics and National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiaobing Li
- State Key Laboratory of Plant Genomics and National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Shengping Li
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Renjie Chen
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Ling Lu
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Dewei Yang
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350019, China
| | - Dingzhong Tang
- State Key Laboratory of Ecological Control of Fujian-Taiwan Crop Pests, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Plant Immunity Center, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Lihuang Zhu
- State Key Laboratory of Plant Genomics and National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
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Landi L, Peralta-Ruiz Y, Chaves-López C, Romanazzi G. Chitosan Coating Enriched With Ruta graveolens L. Essential Oil Reduces Postharvest Anthracnose of Papaya ( Carica papaya L.) and Modulates Defense-Related Gene Expression. FRONTIERS IN PLANT SCIENCE 2021; 12:765806. [PMID: 34858463 PMCID: PMC8632526 DOI: 10.3389/fpls.2021.765806] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
Anthracnose of papaya (Carica papaya L.) caused by the fungus Colletotrichum spp. is one of the most economically important postharvest diseases. Coating with chitosan (CS) and Ruta graveolens essential oil (REO) might represent a novel eco-friendly method to prevent postharvest anthracnose infection. These compounds show both antimicrobial and eliciting activities, although the molecular mechanisms in papaya have not been investigated to date. In this study, the effectiveness of CS and REO alone and combined (CS-REO) on postharvest anthracnose of papaya fruit during storage were investigated, along with the expression of selected genes involved in plant defense mechanisms. Anthracnose incidence was reduced with CS, REO, and CS-REO emulsions after 9 days storage at 25°C, by 8, 21, and 37%, respectively, with disease severity reduced by 22, 29, and 44%, respectively. Thus, McKinney's decay index was reduced by 22, 30, and 44%, respectively. A protocol based on reverse transcription quantitative real-time PCR (RT-qPCR) was validated for 17 papaya target genes linked to signaling pathways that regulate plant defense, pathogenesis-related protein, cell wall-degrading enzymes, oxidative stress, abiotic stress, and the phenylpropanoid pathway. CS induced gene upregulation mainly at 6 h posttreatment (hpt) and 48 hpt, while REO induced the highest upregulation at 0.5 hpt, which then decreased over time. Furthermore, CS-REO treatment delayed gene upregulation by REO alone, from 0.5 to 6 hpt, and kept that longer over time. This study suggests that CS stabilizes the volatile and/or hydrophobic substances of highly reactive essential oils. The additive effects of CS and REO were able to reduce postharvest decay and affect gene expression in papaya fruit.
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Affiliation(s)
- Lucia Landi
- Department of Agricultural, Food and Environmental Sciences, Marche Polytechnic University, Ancona, Italy
| | - Yeimmy Peralta-Ruiz
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
- Facultad de Ingeniería, Programa de Ingeniería Agroindustrial, Universidad del Atlántico, Puerto Colombia, Colombia
| | - Clemencia Chaves-López
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
| | - Gianfranco Romanazzi
- Department of Agricultural, Food and Environmental Sciences, Marche Polytechnic University, Ancona, Italy
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Jia M, Shen X, Tang Y, Shi X, Gu Y. A karyopherin constrains nuclear activity of the NLR protein SNC1 and is essential to prevent autoimmunity in Arabidopsis. MOLECULAR PLANT 2021; 14:1733-1744. [PMID: 34153500 DOI: 10.1016/j.molp.2021.06.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/15/2021] [Accepted: 06/17/2021] [Indexed: 06/13/2023]
Abstract
The nucleotide-binding and leucine-rich repeat (NLR) proteins comprise a major class of intracellular immune receptors that are capable of detecting pathogen-derived molecules and activating immunity and cell death in plants. The activity of some NLRs, particularly the Toll-like/interleukin-1 receptor (TIR) type, is highly correlated with their nucleocytoplasmic distribution. However, whether and how the nucleocytoplasmic homeostasis of NLRs is coordinated through a bidirectional nuclear shuttling mechanism remains unclear. Here, we identified a nuclear transport receptor, KA120, which is capable of affecting the nucleocytoplasmic distribution of an NLR protein and is essential in preventing its autoactivation. We showed that the ka120 mutant displays an autoimmune phenotype and NLR-induced transcriptome features. Through a targeted genetic screen using an artificial NLR microRNA library, we identified the TIR-NLR gene SNC1 as a genetic interactor of KA120. Loss-of-function snc1 mutations as well as compromising SNC1 protein activities all substantially suppressed ka120-induced autoimmune activation, and the enhanced SNC1 activity upon loss of KA120 functionappeared to occur at the protein level. Overexpression of KA120 efficiently repressed SNC1 activity and led to a nearly complete suppression of the autoimmune phenotype caused by the gain-of-function snc1-1 mutation or SNC1 overexpression in transgenic plants. Further florescence imaging analysis indicated that SNC1 undergoes altered nucleocytoplasmic distribution with significantly reduced nuclear signal when KA120 is constitutively expressed, supporting a role of KA120 in coordinating SNC1 nuclear abundance and activity. Consistently, compromising the SNC1 nuclear level by disrupting the nuclear pore complex could also partially rescue ka120-induced autoimmunity. Collectively, our study demonstrates that KA120 is essential to avoid autoimmune activation in the absence of pathogens and is required to constrain the nuclear activity of SNC1, possibly through coordinating SNC1 nucleocytoplasmic homeostasis as a potential mechanism.
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Affiliation(s)
- Min Jia
- Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA; Innovative Genomics Institute, University of California, Berkeley, CA 94720, USA
| | - Xueqi Shen
- Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Yu Tang
- Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA; Innovative Genomics Institute, University of California, Berkeley, CA 94720, USA
| | - Xuetao Shi
- Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Yangnan Gu
- Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA; Innovative Genomics Institute, University of California, Berkeley, CA 94720, USA.
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Sharma M, Fuertes D, Perez-Gil J, Lois LM. SUMOylation in Phytopathogen Interactions: Balancing Invasion and Resistance. Front Cell Dev Biol 2021; 9:703795. [PMID: 34485289 PMCID: PMC8415633 DOI: 10.3389/fcell.2021.703795] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/20/2021] [Indexed: 12/03/2022] Open
Abstract
Plants are constantly confronted by a multitude of biotic stresses involving a myriad of pathogens. In crops, pathogen infections result in significant agronomical losses worldwide posing a threat to food security. In order to enter plant tissues and establish a successful infection, phytopathogens have to surpass several physical, and chemical defense barriers. In recent years, post-translational modification (PTM) mechanisms have emerged as key players in plant defense against pathogens. PTMs allow a highly dynamic and rapid response in front of external challenges, increasing the complexity and precision of cellular responses. In this review, we focus on the role of SUMO conjugation (SUMOylation) in plant immunity against fungi, bacteria, and viruses. In plants, SUMO regulates multiple biological processes, ranging from development to responses arising from environmental challenges. During pathogen attack, SUMO not only modulates the activity of plant defense components, but also serves as a target of pathogen effectors, highlighting its broad role in plant immunity. Here, we summarize known pathogenic strategies targeting plant SUMOylation and, the plant SUMO conjugates involved in host-pathogen interactions. We also provide a catalog of candidate SUMO conjugates according to their role in defense responses. Finally, we discuss the complex role of SUMO in plant defense, focusing on key biological and experimental aspects that contribute to some controversial conclusions, and the opportunities for improving agricultural productivity by engineering SUMOylation in crop species.
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Affiliation(s)
- Manisha Sharma
- Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Barcelona, Spain.,Biosciences, College of Life and Environment Sciences, University of Exeter, Exeter, United Kingdom
| | - Diana Fuertes
- Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Barcelona, Spain
| | - Jordi Perez-Gil
- Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Barcelona, Spain
| | - L Maria Lois
- Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Barcelona, Spain.,Consejo Superior de Investigaciones Científicas, Barcelona, Spain
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Bi G, Zhou JM. Regulation of Cell Death and Signaling by Pore-Forming Resistosomes. ANNUAL REVIEW OF PHYTOPATHOLOGY 2021; 59:239-263. [PMID: 33957051 DOI: 10.1146/annurev-phyto-020620-095952] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Nucleotide-binding leucine-rich repeat receptors (NLRs) are the largest class of immune receptors in plants. They play a key role in the plant surveillance system by monitoring pathogen effectors that are delivered into the plant cell. Recent structural biology and biochemical analyses have uncovered how NLRs are activated to form oligomeric resistosomes upon the recognition of pathogen effectors. In the resistosome, the signaling domain of the NLR is brought to the center of a ringed structure to initiate immune signaling and regulated cell death (RCD). The N terminus of the coiled-coil (CC) domain of the NLR protein HOPZ-ACTIVATED RESISTANCE 1 likely forms a pore in the plasma membrane to trigger RCD in a way analogous to animal pore-forming proteins that trigger necroptosis or pyroptosis. NLRs that carry TOLL-INTERLEUKIN1-RECEPTOR as a signaling domain may also employ pore-forming resistosomes for RCD execution. In addition, increasing evidence supports intimate connections between NLRs and surface receptors in immune signaling. These new findings are rapidly advancing our understanding of the plant immune system.
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Affiliation(s)
- Guozhi Bi
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China;
| | - Jian-Min Zhou
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China;
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing 100049, China
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Physcomitrium patens Infection by Colletotrichum gloeosporioides: Understanding the Fungal-Bryophyte Interaction by Microscopy, Phenomics and RNA Sequencing. J Fungi (Basel) 2021; 7:jof7080677. [PMID: 34436216 PMCID: PMC8401727 DOI: 10.3390/jof7080677] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/10/2021] [Accepted: 08/19/2021] [Indexed: 01/10/2023] Open
Abstract
Anthracnose caused by the hemibiotroph fungus Colletotrichum gloeosporioides is a devastating plant disease with an extensive impact on plant productivity. The process of colonization and disease progression of C. gloeosporioides has been studied in a number of angiosperm crops. To better understand the evolution of the plant response to pathogens, the study of this complex interaction has been extended to bryophytes. The model moss Physcomitrium patens Hedw. B&S (former Physcomitrella patens) is sensitive to known bacterial and fungal phytopathogens, including C. gloeosporioides, which cause infection and cell death. P. patens responses to these microorganisms resemble that of the angiosperms. However, the molecular events during the interaction of P. patens and C. gloeosporioides have not been explored. In this work, we present a comprehensive approach using microscopy, phenomics and RNA-seq analysis to explore the defense response of P. patens to C. gloeosporioides. Microscopy analysis showed that appressoria are already formed at 24 h after inoculation (hai) and tissue colonization and cell death occur at 24 hai and is massive at 48 hai. Consequently, the phenomics analysis showed progressing browning of moss tissues and impaired photosynthesis from 24 to 48 hai. The transcriptomic analysis revealed that more than 1200 P. patens genes were differentially expressed in response to Colletotrichum infection. The analysis of differentially expressed gene function showed that the C. gloeosporioides infection led to a transcription reprogramming in P. patens that upregulated the genes related to pathogen recognition, secondary metabolism, cell wall reinforcement and regulation of gene expression. In accordance with the observed phenomics results, some photosynthesis and chloroplast-related genes were repressed, indicating that, under attack, P. patens changes its transcription from primary metabolism to defend itself from the pathogen.
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Plant AR, Larrieu A, Causier B. Repressor for hire! The vital roles of TOPLESS-mediated transcriptional repression in plants. THE NEW PHYTOLOGIST 2021; 231:963-973. [PMID: 33909309 DOI: 10.1111/nph.17428] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 04/16/2021] [Indexed: 05/15/2023]
Abstract
Transcriptional corepressors play important roles in establishing the appropriate levels of gene expression during growth and development. The TOPLESS (TPL) family of corepressors are critical for all plant life. TPLs are involved in numerous developmental processes and in the response to extrinsic challenges. As such these proteins have been the focus of intense study since Long and colleagues first described the TPL corepressor in 2006. In this review we will explore the evolutionary history of these essential plant-specific proteins, their mechanism of action based on recent structural analyses, and the myriad of pathways in which they function. We speculate how relatively minor changes in the peptide sequence of transcriptional regulators allowed them to recruit TPL into new processes, driving innovation and resulting in TPL becoming vital for plant development.
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Affiliation(s)
- Alastair Robert Plant
- Faculty of Biological Sciences, Centre for Plant Science, University of Leeds, Leeds, LS2 9JT, UK
| | - Antoine Larrieu
- Faculty of Biological Sciences, Centre for Plant Science, University of Leeds, Leeds, LS2 9JT, UK
| | - Barry Causier
- Faculty of Biological Sciences, Centre for Plant Science, University of Leeds, Leeds, LS2 9JT, UK
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Ren G, Zhang X, Li Y, Ridout K, Serrano-Serrano ML, Yang Y, Liu A, Ravikanth G, Nawaz MA, Mumtaz AS, Salamin N, Fumagalli L. Large-scale whole-genome resequencing unravels the domestication history of Cannabis sativa. SCIENCE ADVANCES 2021; 7:7/29/eabg2286. [PMID: 34272249 PMCID: PMC8284894 DOI: 10.1126/sciadv.abg2286] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 06/03/2021] [Indexed: 05/07/2023]
Abstract
Cannabis sativa has long been an important source of fiber extracted from hemp and both medicinal and recreational drugs based on cannabinoid compounds. Here, we investigated its poorly known domestication history using whole-genome resequencing of 110 accessions from worldwide origins. We show that C. sativa was first domesticated in early Neolithic times in East Asia and that all current hemp and drug cultivars diverged from an ancestral gene pool currently represented by feral plants and landraces in China. We identified candidate genes associated with traits differentiating hemp and drug cultivars, including branching pattern and cellulose/lignin biosynthesis. We also found evidence for loss of function of genes involved in the synthesis of the two major biochemically competing cannabinoids during selection for increased fiber production or psychoactive properties. Our results provide a unique global view of the domestication of C. sativa and offer valuable genomic resources for ongoing functional and molecular breeding research.
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Affiliation(s)
- Guangpeng Ren
- Laboratory for Conservation Biology, Department of Ecology and Evolution, Biophore, University of Lausanne, 1015 Lausanne, Switzerland.
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Science and Institute of Innovation Ecology, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Xu Zhang
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Science and Institute of Innovation Ecology, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Ying Li
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Science and Institute of Innovation Ecology, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Kate Ridout
- Laboratory for Conservation Biology, Department of Ecology and Evolution, Biophore, University of Lausanne, 1015 Lausanne, Switzerland
- Oxford Molecular Diagnostics Centre, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Martha L Serrano-Serrano
- Laboratory for Conservation Biology, Department of Ecology and Evolution, Biophore, University of Lausanne, 1015 Lausanne, Switzerland
| | - Yongzhi Yang
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Science and Institute of Innovation Ecology, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Ai Liu
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Science and Institute of Innovation Ecology, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Gudasalamani Ravikanth
- Suri Sehgal Center for Biodiversity and Conservation, Ashoka Trust for Research in Ecology and the Environment, Royal Enclave Srirampura, Jakkur Post, Bangalore 560 064, India
| | - Muhammad Ali Nawaz
- Department of Biological and Environmental Sciences, Qatar University, Doha, Qatar
- Department of Zoology, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Abdul Samad Mumtaz
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Nicolas Salamin
- Department of Computational Biology, Génopode, University of Lausanne, 1015 Lausanne, Switzerland
| | - Luca Fumagalli
- Laboratory for Conservation Biology, Department of Ecology and Evolution, Biophore, University of Lausanne, 1015 Lausanne, Switzerland.
- Centre Universitaire Romand de Médecine Légale, Centre Hospitalier Universitaire Vaudois et Université de Lausanne, Chemin de la Vulliette 4, 1000 Lausanne 25, Switzerland
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40
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Trujillo M. Ubiquitin signalling: controlling the message of surface immune receptors. THE NEW PHYTOLOGIST 2021; 231:47-53. [PMID: 33792068 DOI: 10.1111/nph.17360] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 02/25/2021] [Indexed: 05/27/2023]
Abstract
Microbial attack is first detected by immune receptors located at the plasma membrane. Their activation triggers a plethora of signalling cascades that culminate in the immune response. Ubiquitin and ubiquitin-like protein modifiers play key roles in controlling signalling amplitude and intensity, as well as in buffering proteome imbalances caused by pathogen attack. Here I highlight some of the important advances in the field, which are starting to reveal an intertwined and complex signalling circuitry, which regulates cellular dynamics and protein degradation to maintain homeostasis.
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Affiliation(s)
- Marco Trujillo
- Faculty of Biology, Cell Biology, University of Freiburg, Freiburg, 79104, Germany
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41
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Xu F, Jia M, Li X, Tang Y, Jiang K, Bao J, Gu Y. Exportin-4 coordinates nuclear shuttling of TOPLESS family transcription corepressors to regulate plant immunity. THE PLANT CELL 2021; 33:697-713. [PMID: 33955481 PMCID: PMC8136914 DOI: 10.1093/plcell/koaa047] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 12/07/2020] [Indexed: 05/03/2023]
Abstract
The regulated nucleocytoplasmic exchange of macromolecules is essential for the eukaryotic cell. However, nuclear transport pathways defined by different nuclear transport receptors (NTRs), including importins and exportins, and their significance in activating distinct stress responses are poorly understood in plants. Here, we exploited a CRISPR/Cas9-based genetic screen to search for modifiers of CONSTITUTIVE EXPRESSION OF PATHOGENESIS-RELATED GENE 5 (cpr5), an Arabidopsis thaliana nucleoporin mutant that activates autoimmune responses that partially mimic effector-triggered immunity (ETI). We identified an NTR gene, Exportin-4 (XPO4), as a genetic interactor of CPR5. The xpo4 cpr5 double mutant activates catastrophic immune responses, which leads to seedling lethality. By leveraging the newly developed proximity-labeling proteomics, we profiled XPO4 substrates and identified TOPLESS (TPL) and TPL-related (TPR) transcription corepressors as XPO4-specific cargo. TPL/TPRs target negative regulators of immunity and are redundantly required for ETI induction. We found that loss-of-XPO4 promotes the nuclear accumulation of TPL/TPRs in the presence of elevated salicylic acid (SA), which contributes to the SA-mediated defense amplification and potentiates immune induction in the cpr5 mutant. We showed that TPL and TPRs are required for the enhanced immune activation observed in xpo4 cpr5 but not for the cpr5 single-mutant phenotype, underscoring the functional interplay between XPO4 and TPL/TPRs and its importance in cpr5-dependent immune induction. We propose that XPO4 coordinates the nuclear accumulation of TPL/TPRs, which plays a role in regulating SA-mediated defense feedback to modulate immune strength downstream of CPR5 during ETI induction.
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Affiliation(s)
- Feifei Xu
- Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China
- Institute of Nuclear Agricultural Sciences, Key Laboratory for Nuclear Agricultural Sciences of Zhejiang Province and Ministry of Agriculture and Rural Affairs, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
| | - Min Jia
- Department of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA
- Innovative Genomics Institute, University of California, Berkeley, California 94720, USA
| | - Xin Li
- Department of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA
- Innovative Genomics Institute, University of California, Berkeley, California 94720, USA
| | - Yu Tang
- Department of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA
- Innovative Genomics Institute, University of California, Berkeley, California 94720, USA
| | - Keni Jiang
- Department of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA
| | - Jinsong Bao
- Institute of Nuclear Agricultural Sciences, Key Laboratory for Nuclear Agricultural Sciences of Zhejiang Province and Ministry of Agriculture and Rural Affairs, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
| | - Yangnan Gu
- Department of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA
- Innovative Genomics Institute, University of California, Berkeley, California 94720, USA
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Nguyen QM, Iswanto ABB, Son GH, Kim SH. Recent Advances in Effector-Triggered Immunity in Plants: New Pieces in the Puzzle Create a Different Paradigm. Int J Mol Sci 2021; 22:4709. [PMID: 33946790 PMCID: PMC8124997 DOI: 10.3390/ijms22094709] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/22/2021] [Accepted: 04/27/2021] [Indexed: 12/11/2022] Open
Abstract
Plants rely on multiple immune systems to protect themselves from pathogens. When pattern-triggered immunity (PTI)-the first layer of the immune response-is no longer effective as a result of pathogenic effectors, effector-triggered immunity (ETI) often provides resistance. In ETI, host plants directly or indirectly perceive pathogen effectors via resistance proteins and launch a more robust and rapid defense response. Resistance proteins are typically found in the form of nucleotide-binding and leucine-rich-repeat-containing receptors (NLRs). Upon effector recognition, an NLR undergoes structural change and associates with other NLRs. The dimerization or oligomerization of NLRs signals to downstream components, activates "helper" NLRs, and culminates in the ETI response. Originally, PTI was thought to contribute little to ETI. However, most recent studies revealed crosstalk and cooperation between ETI and PTI. Here, we summarize recent advancements in our understanding of the ETI response and its components, as well as how these components cooperate in the innate immune signaling pathways. Based on up-to-date accumulated knowledge, this review provides our current perspective of potential engineering strategies for crop protection.
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Affiliation(s)
- Quang-Minh Nguyen
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Korea; (Q.-M.N.); (A.B.B.I.); (G.H.S.)
| | - Arya Bagus Boedi Iswanto
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Korea; (Q.-M.N.); (A.B.B.I.); (G.H.S.)
| | - Geon Hui Son
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Korea; (Q.-M.N.); (A.B.B.I.); (G.H.S.)
| | - Sang Hee Kim
- Division of Applied Life Science (BK21 Four Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Korea; (Q.-M.N.); (A.B.B.I.); (G.H.S.)
- Division of Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Korea
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Fang J, Guo T, Xie Z, Chun Y, Zhao J, Peng L, Zafar SA, Yuan S, Xiao L, Li X. The URL1-ROC5-TPL2 transcriptional repressor complex represses the ACL1 gene to modulate leaf rolling in rice. PLANT PHYSIOLOGY 2021; 185:1722-1744. [PMID: 33793928 PMCID: PMC8133684 DOI: 10.1093/plphys/kiaa121] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 12/13/2020] [Indexed: 05/31/2023]
Abstract
Moderate leaf rolling is beneficial for leaf erectness and compact plant architecture. However, our understanding regarding the molecular mechanisms of leaf rolling is still limited. Here, we characterized a semi-dominant rice (Oryza sativa L.) mutant upward rolled leaf 1 (Url1) showing adaxially rolled leaves due to a decrease in the number and size of bulliform cells. Map-based cloning revealed that URL1 encodes the homeodomain-leucine zipper (HD-Zip) IV family member RICE OUTERMOST CELL-SPECIFIC 8 (ROC8). A single-base substitution in one of the two conserved complementary motifs unique to the 3'-untranslated region of this family enhanced URL1 mRNA stability and abundance in the Url1 mutant. URL1 (UPWARD ROLLED LEAF1) contains an ethylene-responsive element binding factor-associated amphiphilic repression motif and functions as a transcriptional repressor via interaction with the TOPLESS co-repressor OsTPL2. Rather than homodimerizing, URL1 heterodimerizes with another HD-ZIP IV member ROC5. URL1 could bind directly to the promoter and suppress the expression of abaxially curled leaf 1 (ACL1), a positive regulator of bulliform cell development. Knockout of OsTPL2 or ROC5 or overexpression of ACL1 in the Url1 mutant partially suppressed the leaf-rolling phenotype. Our results reveal a regulatory network whereby a transcriptional repression complex composed of URL1, ROC5, and the transcriptional corepressor TPL2 suppresses the expression of the ACL1 gene, thus modulating bulliform cell development and leaf rolling in rice.
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Affiliation(s)
- Jingjing Fang
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Tingting Guo
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
- Hunan Provincial Key Laboratory of Phytohormones, Hunan Provincial Key Laboratory for Crop Germplasm Innovation and Utilization, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
- College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China
| | - Zhiwei Xie
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yan Chun
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jinfeng Zhao
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Lixiang Peng
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Syed Adeel Zafar
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Shoujiang Yuan
- Shandong Rice Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Langtao Xiao
- Hunan Provincial Key Laboratory of Phytohormones, Hunan Provincial Key Laboratory for Crop Germplasm Innovation and Utilization, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
| | - Xueyong Li
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
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Darino M, Chia K, Marques J, Aleksza D, Soto‐Jiménez LM, Saado I, Uhse S, Borg M, Betz R, Bindics J, Zienkiewicz K, Feussner I, Petit‐Houdenot Y, Djamei A. Ustilago maydis effector Jsi1 interacts with Topless corepressor, hijacking plant jasmonate/ethylene signaling. THE NEW PHYTOLOGIST 2021; 229:3393-3407. [PMID: 33247447 PMCID: PMC8126959 DOI: 10.1111/nph.17116] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 11/16/2020] [Indexed: 05/19/2023]
Abstract
Ustilago maydis is the causal agent of maize smut disease. During the colonization process, the fungus secretes effector proteins that suppress immune responses and redirect the host metabolism in favor of the pathogen. As effectors play a critical role during plant colonization, their identification and functional characterization are essential to understanding biotrophy and disease. Using biochemical, molecular, and transcriptomic techniques, we performed a functional characterization of the U. maydis effector Jasmonate/Ethylene signaling inducer 1 (Jsi1). Jsi1 interacts with several members of the plant corepressor family Topless/Topless related (TPL/TPR). Jsi1 expression in Zea mays and Arabidopsis thaliana leads to transcriptional induction of the ethylene response factor (ERF) branch of the jasmonate/ethylene (JA/ET) signaling pathway. In A. thaliana, activation of the ERF branch leads to biotrophic susceptibility. Jsi1 likely activates the ERF branch via an EAR (ET-responsive element binding-factor-associated amphiphilic repression) motif, which resembles EAR motifs from plant ERF transcription factors, that interacts with TPL/TPR proteins. EAR-motif-containing effector candidates were identified from different fungal species, including Magnaporthe oryzae, Sporisorium scitamineum, and Sporisorium reilianum. Interaction between plant TPL proteins and these effector candidates from biotrophic and hemibiotrophic fungi indicates the convergent evolution of effectors modulating the TPL/TPR corepressor hub.
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Affiliation(s)
- Martin Darino
- Gregor Mendel Institute of Molecular Plant Biology (GMI)Austrian Academy of Sciences (OEAW)Vienna BioCenter (VBC)Vienna1030Austria
| | - Khong‐Sam Chia
- The Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)OT Gatersleben06466Germany
| | - Joana Marques
- Gregor Mendel Institute of Molecular Plant Biology (GMI)Austrian Academy of Sciences (OEAW)Vienna BioCenter (VBC)Vienna1030Austria
| | - David Aleksza
- University of Natural Resources and Life Sciences (BOKU)Vienna1180Austria
| | - Luz Mayela Soto‐Jiménez
- Gregor Mendel Institute of Molecular Plant Biology (GMI)Austrian Academy of Sciences (OEAW)Vienna BioCenter (VBC)Vienna1030Austria
| | - Indira Saado
- The Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)OT Gatersleben06466Germany
| | - Simon Uhse
- Gregor Mendel Institute of Molecular Plant Biology (GMI)Austrian Academy of Sciences (OEAW)Vienna BioCenter (VBC)Vienna1030Austria
| | - Michael Borg
- Gregor Mendel Institute of Molecular Plant Biology (GMI)Austrian Academy of Sciences (OEAW)Vienna BioCenter (VBC)Vienna1030Austria
| | - Ruben Betz
- The Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)OT Gatersleben06466Germany
| | - Janos Bindics
- Gregor Mendel Institute of Molecular Plant Biology (GMI)Austrian Academy of Sciences (OEAW)Vienna BioCenter (VBC)Vienna1030Austria
- Institute of Molecular Biotechnology (IMBA)Vienna BioCenter (VBC)Vienna1030Austria
| | - Krzysztof Zienkiewicz
- Service Unit for Metabolomics and LipidomicsGoettingen Center for Molecular Biosciences (GZMB)University of GoettingenGoettingenD‐37077Germany
- Department of Plant BiochemistryAlbrecht von Haller Institute and Göttingen Center for Molecular Biosciences (GZMB)University of GöttingenGöttingenD‐37077Germany
| | - Ivo Feussner
- Service Unit for Metabolomics and LipidomicsGoettingen Center for Molecular Biosciences (GZMB)University of GoettingenGoettingenD‐37077Germany
- Department of Plant BiochemistryAlbrecht von Haller Institute and Göttingen Center for Molecular Biosciences (GZMB)University of GöttingenGöttingenD‐37077Germany
| | - Yohann Petit‐Houdenot
- UMR BIOGERINRAAgroParisTechUniversité Paris‐SaclayThiverval‐Grignon78850France
- The Sainsbury LaboratoryUniversity of East AngliaNorwich,NR4 7UKUK
| | - Armin Djamei
- Gregor Mendel Institute of Molecular Plant Biology (GMI)Austrian Academy of Sciences (OEAW)Vienna BioCenter (VBC)Vienna1030Austria
- The Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)OT Gatersleben06466Germany
- Present address:
Department of PhytopathologyInstitute of Crop Science and Resource ConservationUniversity of BonnBonn53115Germany
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Ito T, Fukazawa J. SCARECROW-LIKE3 regulates the transcription of gibberellin-related genes by acting as a transcriptional co-repressor of GAI-ASSOCIATED FACTOR1. PLANT MOLECULAR BIOLOGY 2021; 105:463-482. [PMID: 33474657 DOI: 10.1007/s11103-020-01101-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 12/01/2020] [Indexed: 06/12/2023]
Abstract
SCL3 inhibits transcriptional activity of IDD-DELLA complex by acting as a co-repressor and repression activity is enhanced in the presence of GAF1 in a TOPLESS-independent manner. GRAS [GIBBERELLIN-INSENSITIVE (GAI), REPRESSOR OF ga1-3 (RGA) and SCARECROW (SCR)] proteins are a family of plant-specific transcriptional regulators that play diverse roles in development and signaling. GRAS family DELLA proteins act as growth repressors by inhibiting gibberellin (GA) signaling in response to developmental and environmental cues. DELLAs also act as co-activators of transcription factor GAI-ASSOCIATED FACTOR1 (GAF1)/INDETERMINATE DOMAIN2 (IDD2), the GAF1-DELLA complex activating transcription of GAF1 target genes. GAF1 also interacts with TOPLESS (TPL), a transcriptional co-repressor, in the absence of DELLA, the GAF1-TPL complex repressing transcription of the target genes. SCARECROW-LIKE3 (SCL3), another member of the GRAS family, is thought to inhibit transcriptional activity of the IDD-DELLA complex through competitive interaction with IDD. Here, we also revealed that SCL3 inhibits transcriptional activation by the GAF1-DELLA complex via repression activity rather than via competitive inhibition of the GAF1-DELLA interaction. Moreover, the repression activity of SCL3 was enhanced by GAF1 in a TPL-independent manner. While the GRAS domain of DELLA has transcriptional activation activity, that of SCL3 has repression activity. SCL3 also inhibited transcriptional activity of GAF1-RGA fusion proteins. Results from the co-immunoprecipitation assays and the yeast three-hybrid assay suggested the possibility that SCL3 forms a ternary complex with GAF1 and DELLA. These findings provide important information on DELLA-regulated GA signaling and new insight into the transcriptional repression mechanism.
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Affiliation(s)
- Takeshi Ito
- Graduate School of Integrated Sciences for Life, Hiroshima University, Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan.
| | - Jutarou Fukazawa
- Graduate School of Integrated Sciences for Life, Hiroshima University, Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
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Opposing functions of the plant TOPLESS gene family during SNC1-mediated autoimmunity. PLoS Genet 2021; 17:e1009026. [PMID: 33621240 PMCID: PMC7935258 DOI: 10.1371/journal.pgen.1009026] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 03/05/2021] [Accepted: 02/05/2021] [Indexed: 11/19/2022] Open
Abstract
Regulation of the plant immune system is important for controlling the specificity and amplitude of responses to pathogens and in preventing growth-inhibiting autoimmunity that leads to reductions in plant fitness. In previous work, we reported that SRFR1, a negative regulator of effector-triggered immunity, interacts with SNC1 and EDS1. When SRFR1 is non-functional in the Arabidopsis accession Col-0, SNC1 levels increase, causing a cascade of events that lead to autoimmunity phenotypes. Previous work showed that some members of the transcriptional co-repressor family TOPLESS interact with SNC1 to repress negative regulators of immunity. Therefore, to explore potential connections between SRFR1 and TOPLESS family members, we took a genetic approach that examined the effect of each TOPLESS member in the srfr1 mutant background. The data indicated that an additive genetic interaction exists between SRFR1 and two members of the TOPLESS family, TPR2 and TPR3, as demonstrated by increased stunting and elevated PR2 expression in srfr1 tpr2 and srfr1 tpr2 tpr3 mutants. Furthermore, the tpr2 mutation intensifies autoimmunity in the auto-active snc1-1 mutant, indicating a novel role of these TOPLESS family members in negatively regulating SNC1-dependent phenotypes. This negative regulation can also be reversed by overexpressing TPR2 in the srfr1 tpr2 background. Similar to TPR1 that positively regulates snc1-1 phenotypes by interacting with SNC1, we show here that TPR2 directly binds the N-terminal domain of SNC1. In addition, TPR2 interacts with TPR1 in vivo, suggesting that the opposite functions of TPR2 and TPR1 are based on titration of SNC1-TPR1 complexes by TPR2 or altered functions of a SNC1-TPR1-TPR2 complex. Thus, this work uncovers diverse functions of individual members of the TOPLESS family in Arabidopsis and provides evidence for the additive effect of transcriptional and post-transcriptional regulation of SNC1. The immune system is a double-edged sword that affords organisms with protection against infectious diseases but can also lead to negative effects if not properly controlled. Plants only possess an innate antimicrobial immune system that relies on rapid upregulation of defenses once immune receptors detect the presence of microbes. Plant immune receptors known as resistance proteins play a key role in rapidly triggering defenses if pathogens breach other defenses. A common model of unregulated immunity in the reference Arabidopsis variety Columbia-0 involves a resistance gene called SNC1. When the SNC1 protein accumulates to unnaturally high levels or possesses auto-activating mutations, the visible manifestations of immune overactivity include stunted growth and low biomass and seedset. Consequently, expression of this gene and accumulation of the encoded protein are tightly regulated on multiple levels. Despite careful study the mechanisms of SNC1 gene regulation are not fully understood. Here we present data on members of the well-known TOPLESS family of transcriptional repressors. While previously characterized members were shown to function in indirect activation of defenses, TPR2 and TPR3 are shown here to function in preventing high defense activity. This study therefore contributes to the understanding of complex regulatory processes in plant immunity.
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Lüdke D, Roth C, Kamrad SA, Messerschmidt J, Hartken D, Appel J, Hörnich BF, Yan Q, Kusch S, Klenke M, Gunkel A, Wirthmueller L, Wiermer M. Functional requirement of the Arabidopsis importin-α nuclear transport receptor family in autoimmunity mediated by the NLR protein SNC1. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 105:994-1009. [PMID: 33210758 DOI: 10.1111/tpj.15082] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/03/2020] [Accepted: 11/11/2020] [Indexed: 05/28/2023]
Abstract
IMPORTIN-α3/MOS6 (MODIFIER OF SNC1, 6) is one of nine importin-α isoforms in Arabidopsis that recruit nuclear localization signal-containing cargo proteins to the nuclear import machinery. IMP-α3/MOS6 is required genetically for full autoimmunity of the nucleotide-binding leucine-rich repeat immune receptor mutant snc1 (suppressor of npr1-1, constitutive 1) and MOS6 also contributes to basal disease resistance. Here, we investigated the contribution of the other importin-α genes to both types of immune responses, and we analyzed potential interactions of all importin-α isoforms with SNC1. By using reverse-genetic analyses in Arabidopsis and protein-protein interaction assays in Nicotiana benthamiana, we provide evidence that among the nine α-importins in Arabidopsis, IMP-α3/MOS6 is the main nuclear transport receptor of SNC1, and that IMP-α3/MOS6 is required selectively for autoimmunity of snc1 and basal resistance to mildly virulent Pseudomonas syringae in Arabidopsis.
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Affiliation(s)
- Daniel Lüdke
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Charlotte Roth
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Sieglinde A Kamrad
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Jana Messerschmidt
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Denise Hartken
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Jonas Appel
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Bojan F Hörnich
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Qiqi Yan
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Stefan Kusch
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Melanie Klenke
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Annette Gunkel
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
| | - Lennart Wirthmueller
- Biochemistry of Plant Interactions, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle (Saale), Germany
| | - Marcel Wiermer
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Goettingen, Julia-Lermontowa-Weg 3, 37077, Goettingen, Germany
- Molecular Biology of Plant-Microbe Interactions Research Group, Goettingen Center for Molecular Biosciences (GZMB), University of Goettingen, 37077, Goettingen, Germany
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Doroodian P, Hua Z. The Ubiquitin Switch in Plant Stress Response. PLANTS (BASEL, SWITZERLAND) 2021; 10:246. [PMID: 33514032 PMCID: PMC7911189 DOI: 10.3390/plants10020246] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 01/19/2021] [Accepted: 01/22/2021] [Indexed: 12/20/2022]
Abstract
Ubiquitin is a 76 amino acid polypeptide common to all eukaryotic organisms. It functions as a post-translationally modifying mark covalently linked to a large cohort of yet poorly defined protein substrates. The resulting ubiquitylated proteins can rapidly change their activities, cellular localization, or turnover through the 26S proteasome if they are no longer needed or are abnormal. Such a selective modification is essential to many signal transduction pathways particularly in those related to stress responses by rapidly enhancing or quenching output. Hence, this modification system, the so-called ubiquitin-26S proteasome system (UPS), has caught the attention in the plant research community over the last two decades for its roles in plant abiotic and biotic stress responses. Through direct or indirect mediation of plant hormones, the UPS selectively degrades key components in stress signaling to either negatively or positively regulate plant response to a given stimulus. As a result, a tightly regulated signaling network has become of much interest over the years. The ever-increasing changes of the global climate require both the development of new crops to cope with rapid changing environment and new knowledge to survey the dynamics of ecosystem. This review examines how the ubiquitin can switch and tune plant stress response and poses potential avenues to further explore this system.
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Affiliation(s)
- Paymon Doroodian
- Department of Environment and Plant Biology, Ohio University, Athens, OH 45701, USA;
- Molecular and Cellular Biology Program, Ohio University, Athens, OH 45701, USA
| | - Zhihua Hua
- Department of Environment and Plant Biology, Ohio University, Athens, OH 45701, USA;
- Molecular and Cellular Biology Program, Ohio University, Athens, OH 45701, USA
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Lüdke D, Rohmann PFW, Wiermer M. Nucleocytoplasmic Communication in Healthy and Diseased Plant Tissues. FRONTIERS IN PLANT SCIENCE 2021; 12:719453. [PMID: 34394173 PMCID: PMC8357054 DOI: 10.3389/fpls.2021.719453] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 07/09/2021] [Indexed: 05/16/2023]
Abstract
The double membrane of the nuclear envelope (NE) constitutes a selective compartment barrier that separates nuclear from cytoplasmic processes. Plant viability and responses to a changing environment depend on the spatial communication between both compartments. This communication is based on the bidirectional exchange of proteins and RNAs and is regulated by a sophisticated transport machinery. Macromolecular traffic across the NE depends on nuclear transport receptors (NTRs) that mediate nuclear import (i.e. importins) or export (i.e. exportins), as well as on nuclear pore complexes (NPCs) that are composed of nucleoporin proteins (NUPs) and span the NE. In this review, we provide an overview of plant NPC- and NTR-directed cargo transport and we consider transport independent functions of NPCs and NE-associated proteins in regulating plant developmental processes and responses to environmental stresses.
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Affiliation(s)
- Daniel Lüdke
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Göttingen, Göttingen, Germany
| | - Philipp F. W. Rohmann
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Göttingen, Göttingen, Germany
| | - Marcel Wiermer
- Molecular Biology of Plant-Microbe Interactions Research Group, Albrecht-von-Haller-Institute for Plant Sciences, University of Göttingen, Göttingen, Germany
- Molecular Biology of Plant-Microbe Interactions Research Group, Göttingen Center for Molecular Biosciences, University of Göttingen, Göttingen, Germany
- *Correspondence: Marcel Wiermer,
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Li ZX, Lan JB, Liu YQ, Qi LW, Tang JM. Investigation of the role of AcTPR2 in kiwifruit and its response to Botrytis cinerea infection. BMC PLANT BIOLOGY 2020; 20:557. [PMID: 33302873 PMCID: PMC7731759 DOI: 10.1186/s12870-020-02773-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 12/02/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND Elucidation of the regulatory mechanism of kiwifruit response to gray mold disease caused by Botrytis cinerea can provide the basis for its molecular breeding to impart resistance against this disease. In this study, 'Hongyang' kiwifruit served as the experimental material; the TOPLESS/TOPLESS-RELATED (TPL/TPR) co-repressor gene AcTPR2 was cloned into a pTRV2 vector (AcTPR2-TRV) and the virus-induced gene silencing technique was used to establish the functions of the AcTPR2 gene in kiwifruit resistance to Botrytis cinerea. RESULTS Virus-induced silencing of AcTPR2 enhanced the susceptibility of kiwifruit to Botrytis cinerea. Defensive enzymes such as superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and phenylalanine ammonia-lyase (PAL) and endogenous phytohormones such as indole acetic acid (IAA), gibberellin (GA3), abscisic acid (ABA), and salicylic acid (SA) were detected. Kiwifruit activated these enzymes and endogenous phytohormones in response to pathogen-induced stress and injury. The expression levels of the IAA signaling genes-AcNIT, AcARF1, and AcARF2-were higher in the AcTPR2-TRV treatment group than in the control. The IAA levels were higher and the rot phenotype was more severe in AcTPR2-TRV kiwifruits than that in the control. These results suggested that AcTPR2 downregulation promotes expression of IAA and IAA signaling genes and accelerates postharvest kiwifruit senescence. Further, Botrytis cinerea dramatically upregulated AcTPR2, indicating that AcTPR2 augments kiwifruit defense against pathogens by downregulating the IAA and IAA signaling genes. CONCLUSIONS The results of the present study could help clarify the regulatory mechanisms of disease resistance in kiwifruit and furnish genetic resources for molecular breeding of kiwifruit disease resistance.
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Affiliation(s)
- Zhe-Xin Li
- Chongqing Key Laboratory of Economic Plant Biotechnology, Collaborative Innovation Center of Special Plant Industry in Chongqing, College of Landscape Architecture and Life Science/ Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, 402160, P.R. China
| | - Jian-Bin Lan
- Chongqing Key Laboratory of Economic Plant Biotechnology, Collaborative Innovation Center of Special Plant Industry in Chongqing, College of Landscape Architecture and Life Science/ Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, 402160, P.R. China
| | - Yi-Qing Liu
- Chongqing Key Laboratory of Economic Plant Biotechnology, Collaborative Innovation Center of Special Plant Industry in Chongqing, College of Landscape Architecture and Life Science/ Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, 402160, P.R. China
| | - Li-Wang Qi
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, P.R. China.
| | - Jian-Min Tang
- Chongqing Key Laboratory of Economic Plant Biotechnology, Collaborative Innovation Center of Special Plant Industry in Chongqing, College of Landscape Architecture and Life Science/ Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, 402160, P.R. China.
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