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Roeschlin RA, Azad SM, Grove RP, Chuan A, García L, Niñoles R, Uviedo F, Villalobos L, Massimino ME, Marano MR, Boch J, Gadea J. Designer TALEs enable discovery of cell death-inducer genes. PLANT PHYSIOLOGY 2024; 195:2985-2996. [PMID: 38723194 PMCID: PMC11288752 DOI: 10.1093/plphys/kiae230] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 03/26/2024] [Indexed: 08/02/2024]
Abstract
Transcription activator-like effectors (TALEs) in plant-pathogenic Xanthomonas bacteria activate expression of plant genes and support infection or cause a resistance response. PthA4AT is a TALE with a particularly short DNA-binding domain harboring only 7.5 repeats which triggers cell death in Nicotiana benthamiana; however, the genetic basis for this remains unknown. To identify possible target genes of PthA4AT that mediate cell death in N. benthamiana, we exploited the modularity of TALEs to stepwise enhance their specificity and reduce potential target sites. Substitutions of individual repeats suggested that PthA4AT-dependent cell death is sequence specific. Stepwise addition of repeats to the C-terminal or N-terminal end of the repeat region narrowed the sequence requirements in promoters of target genes. Transcriptome profiling and in silico target prediction allowed the isolation of two cell death inducer genes, which encode a patatin-like protein and a bifunctional monodehydroascorbate reductase/carbonic anhydrase protein. These two proteins are not linked to known TALE-dependent resistance genes. Our results show that the aberrant expression of different endogenous plant genes can cause a cell death reaction, which supports the hypothesis that TALE-dependent executor resistance genes can originate from various plant processes. Our strategy further demonstrates the use of TALEs to scan genomes for genes triggering cell death and other relevant phenotypes.
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Affiliation(s)
- Roxana A Roeschlin
- Instituto de Biología Molecular y Celular de Rosario (IBR)-Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ocampo y Esmeralda S/n, S2002LRK, Rosario, Argentina
| | - Sepideh M Azad
- Instituto de Biología Molecular y celular de Plantas (IBMCP), Universidad Politécnica de Valencia-CSIC, Ingeniero Fausto Elio S/N., 46022, Valencia, España
| | - René P Grove
- Institute of Plant Genetics, Leibniz Universität Hannover, 30419 Hannover, Germany
| | - Ana Chuan
- Instituto de Biología Molecular y celular de Plantas (IBMCP), Universidad Politécnica de Valencia-CSIC, Ingeniero Fausto Elio S/N., 46022, Valencia, España
| | - Lucila García
- Instituto de Biología Molecular y Celular de Rosario (IBR)-Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ocampo y Esmeralda S/n, S2002LRK, Rosario, Argentina
- Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Suipacha 590, S2002LRK, Rosario, Argentina
| | - Regina Niñoles
- Instituto de Biología Molecular y celular de Plantas (IBMCP), Universidad Politécnica de Valencia-CSIC, Ingeniero Fausto Elio S/N., 46022, Valencia, España
| | - Facundo Uviedo
- Instituto de Biología Molecular y Celular de Rosario (IBR)-Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ocampo y Esmeralda S/n, S2002LRK, Rosario, Argentina
| | - Liara Villalobos
- Instituto de Biología Molecular y Celular de Rosario (IBR)-Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ocampo y Esmeralda S/n, S2002LRK, Rosario, Argentina
| | - Maria E Massimino
- Instituto de Biología Molecular y celular de Plantas (IBMCP), Universidad Politécnica de Valencia-CSIC, Ingeniero Fausto Elio S/N., 46022, Valencia, España
| | - María R Marano
- Instituto de Biología Molecular y Celular de Rosario (IBR)-Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ocampo y Esmeralda S/n, S2002LRK, Rosario, Argentina
- Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Suipacha 590, S2002LRK, Rosario, Argentina
| | - Jens Boch
- Institute of Plant Genetics, Leibniz Universität Hannover, 30419 Hannover, Germany
| | - José Gadea
- Instituto de Biología Molecular y celular de Plantas (IBMCP), Universidad Politécnica de Valencia-CSIC, Ingeniero Fausto Elio S/N., 46022, Valencia, España
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Camargo-Escalante MO, Balcázar-López E, Albores Méndez EM, Winkler R, Herrera-Estrella A. LOX1- and PLP1-dependent transcriptional reprogramming is essential for injury-induced conidiophore development in a filamentous fungus. Microbiol Spectr 2023; 11:e0260723. [PMID: 37943049 PMCID: PMC10714772 DOI: 10.1128/spectrum.02607-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/04/2023] [Indexed: 11/10/2023] Open
Abstract
IMPORTANCE In addition to being considered a biocontrol agent, the fungus Trichoderma atroviride is a relevant model for studying mechanisms of response to injury conserved in plants and animals that opens a new landscape in relation to regeneration and cell differentiation mechanisms. Here, we reveal the co-functionality of a lipoxygenase and a patatin-like phospholipase co-expressed in response to wounding in fungi. This pair of enzymes produces oxidized lipids that can function as signaling molecules or oxidative stress signals that, in ascomycetes, induce asexual development. Furthermore, we determined that both genes participate in the regulation of the synthesis of 13-HODE and the establishment of the physiological responses necessary for the formation of reproductive aerial mycelium ultimately leading to asexual development. Our results suggest an injury-induced pathway to produce oxylipins and uncovered physiological mechanisms regulated by LOX1 and PLP1 to induce conidiation, opening new hypotheses for the novo regeneration mechanisms of filamentous fungi.
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Affiliation(s)
- Martín O. Camargo-Escalante
- Laboratorio Nacional de Genómica para la Biodiversidad-Unidad de Genómica Avanzada, Cinvestav, Irapuato, Guanajuato, Mexico
| | - Edgar Balcázar-López
- Laboratorio Nacional de Genómica para la Biodiversidad-Unidad de Genómica Avanzada, Cinvestav, Irapuato, Guanajuato, Mexico
| | - Exsal M. Albores Méndez
- Escuela Militar de Graduados de Sanidad, Universidad del Ejército y Fuerza Aérea Mexicanos, Secretaría de la Defensa Nacional, Mexico City, Mexico
| | - Robert Winkler
- Laboratorio Nacional de Genómica para la Biodiversidad-Unidad de Genómica Avanzada, Cinvestav, Irapuato, Guanajuato, Mexico
| | - Alfredo Herrera-Estrella
- Laboratorio Nacional de Genómica para la Biodiversidad-Unidad de Genómica Avanzada, Cinvestav, Irapuato, Guanajuato, Mexico
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Abstract
Investigation of fungal biology has been frequently motivated by the fact that many fungal species are important plant and animal pathogens. Such efforts have contributed significantly toward our understanding of fungal pathogenic lifestyles (virulence factors and strategies) and the interplay with host immune systems. In parallel, work on fungal allorecognition systems leading to the characterization of fungal regulated cell death determinants and pathways, has been instrumental for the emergent concept of fungal immunity. The uncovered evolutionary trans-kingdom parallels between fungal regulated cell death pathways and innate immune systems incite us to reflect further on the concept of a fungal immune system. Here, I briefly review key findings that have shaped the fungal immunity paradigm, providing a perspective on what I consider its most glaring knowledge gaps. Undertaking to fill such gaps would establish firmly the fungal immune system inside the broader field of comparative immunology.
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Affiliation(s)
- Asen Daskalov
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
- ImmunoConcEpT, CNRS UMR 5164, University of Bordeaux, Bordeaux, France
- Corresponding author
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Wei Y, Chong Z, Lu C, Li K, Liang C, Meng Z, Wang Y, Guo S, He L, Zhang R. Genome-wide identification and expression analysis of the cotton patatin-related phospholipase A genes and response to stress tolerance. PLANTA 2023; 257:49. [PMID: 36752875 DOI: 10.1007/s00425-023-04081-8] [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: 11/17/2022] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Patatin-related phospholipase A genes were involved in the response of Gossypium hirsutum to drought and salt tolerance. pPLA (patatin-related phospholipase A) is a key enzyme that catalyzes the initial step of lipid hydrolysis, which is involved in biological processes, such as drought, salt stress, and freezing injury. However, a comprehensive analysis of the pPLA gene family in cotton, especially the role of pPLA in the response to drought and salt tolerance, has not been reported so far. A total of 33 pPLA genes were identified in this study using a genome-wide search approach, and phylogenetic analysis classified these genes into three groups. These genes are unevenly distributed on the 26 chromosomes of cotton, and most of them contain a few introns. The results of the collinear analysis showed that G. hirsutum contained 1-5 copies of each pPLA gene found in G. arboreum and G. raimondii. The subcellular localization analysis of Gh_D08G061200 showed that the protein was localized in the nucleus. In addition, analysis of published upland cotton transcriptome data revealed that six GhPLA genes were expressed in various tissues and organs. Two genes (Gh_A04G142100.1 and Gh_D04G181000.1) were highly expressed in all tissues under normal conditions, showing the expression characteristics of housekeeping genes. Under different drought and salt tolerance stresses, we detected four genes with different expression levels. This study helps to clarify the role of pPLA in the response to drought and salt tolerance.
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Affiliation(s)
- Yunxiao Wei
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Zhongguancun, Nandajie No. 12, Haidian District, Beijing, 100081, China
| | - Zhili Chong
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Zhongguancun, Nandajie No. 12, Haidian District, Beijing, 100081, China
- College of Plant Science, Tarim University, 1487 East Tarim Avenue, Aral City, 843300, China
| | - Chao Lu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Zhongguancun, Nandajie No. 12, Haidian District, Beijing, 100081, China
| | - Kaili Li
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Zhongguancun, Nandajie No. 12, Haidian District, Beijing, 100081, China
| | - Chengzhen Liang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Zhongguancun, Nandajie No. 12, Haidian District, Beijing, 100081, China
| | - Zhigang Meng
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Zhongguancun, Nandajie No. 12, Haidian District, Beijing, 100081, China
| | - Yuan Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Zhongguancun, Nandajie No. 12, Haidian District, Beijing, 100081, China
| | - Sandui Guo
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Zhongguancun, Nandajie No. 12, Haidian District, Beijing, 100081, China
| | - Liangrong He
- College of Plant Science, Tarim University, 1487 East Tarim Avenue, Aral City, 843300, China.
| | - Rui Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Zhongguancun, Nandajie No. 12, Haidian District, Beijing, 100081, China.
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Xu XJ, Geng C, Jiang SY, Zhu Q, Yan ZY, Tian YP, Li XD. A maize triacylglycerol lipase inhibits sugarcane mosaic virus infection. PLANT PHYSIOLOGY 2022; 189:754-771. [PMID: 35294544 PMCID: PMC9157127 DOI: 10.1093/plphys/kiac126] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 02/18/2022] [Indexed: 05/13/2023]
Abstract
Triacylglycerol lipase (TGL) plays critical roles in providing energy for seed germination and plant development. However, the role of TGL in regulating plant virus infection is largely unknown. In this study, we adopted affinity purification coupled with mass spectrometry and identified that a maize (Zea mays) pathogenesis-related lipase protein Z. mays TGL (ZmTGL) interacted with helper component-proteinase (HC-Pro) of sugarcane mosaic virus (SCMV). Yeast two-hybrid, luciferase complementation imaging, and bimolecular fluorescence complementation assays confirmed that ZmTGL directly interacted with SCMV HC-Pro in vitro and in vivo. The 101-460 residues of SCMV HC-Pro were important for its interaction with ZmTGL. ZmTGL and SCMV HC-Pro co-localized at the mitochondria. Silencing of ZmTGL facilitated SCMV infection, and over-expression of ZmTGL reduced the RNA silencing suppression activity, most likely through reducing HC-Pro accumulation. Our results provided evidence that the lipase hydrolase activity of ZmTGL was associated with reducing HC-Pro accumulation, activation of salicylic acid (SA)-mediated defense response, and inhibition of SCMV infection. We show that ZmTGL inhibits SCMV infection by reducing HC-Pro accumulation and activating the SA pathway.
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Affiliation(s)
- Xiao-Jie Xu
- Department of Plant Pathology, College of Plant Protection, Laboratory of Plant Virology, Shandong Agricultural University, Tai’an, Shandong 271018, China
| | - Chao Geng
- Department of Plant Pathology, College of Plant Protection, Laboratory of Plant Virology, Shandong Agricultural University, Tai’an, Shandong 271018, China
| | - Shao-Yan Jiang
- Department of Plant Pathology, College of Plant Protection, Laboratory of Plant Virology, Shandong Agricultural University, Tai’an, Shandong 271018, China
| | - Qing Zhu
- Department of Plant Pathology, College of Plant Protection, Laboratory of Plant Virology, Shandong Agricultural University, Tai’an, Shandong 271018, China
| | - Zhi-Yong Yan
- Department of Plant Pathology, College of Plant Protection, Laboratory of Plant Virology, Shandong Agricultural University, Tai’an, Shandong 271018, China
| | - Yan-Ping Tian
- Department of Plant Pathology, College of Plant Protection, Laboratory of Plant Virology, Shandong Agricultural University, Tai’an, Shandong 271018, China
- Author for correspondence:
| | - Xiang-Dong Li
- Department of Plant Pathology, College of Plant Protection, Laboratory of Plant Virology, Shandong Agricultural University, Tai’an, Shandong 271018, China
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Zhou Q, Jayawardhane KN, Strelkov SE, Hwang SF, Chen G. Identification of Arabidopsis Phospholipase A Mutants With Increased Susceptibility to Plasmodiophora brassicae. FRONTIERS IN PLANT SCIENCE 2022; 13:799142. [PMID: 35251078 PMCID: PMC8895301 DOI: 10.3389/fpls.2022.799142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
Clubroot, caused by the obligate parasite Plasmodiophora brassicae, is one of the most devastating diseases of canola (Brassica napus) in Canada. The identification of novel genes that contribute to clubroot resistance is important for the sustainable management of clubroot, as these genes may be used in the development of resistant canola cultivars. Phospholipase As (PLAs) play important roles in plant defense signaling and stress tolerance, and thus are attractive targets for crop breeding. However, since canola is an allopolyploid and has multiple copies of each PLA gene, it is time-consuming to test the functions of PLAs directly in this crop. In contrast, the model plant Arabidopsis thaliana has a simpler genetic background and only one copy of each PLA. Therefore, it would be reasonable and faster to validate the potential utility of PLA genes in Arabidopsis first. In this study, we identified seven homozygous atpla knockout/knockdown mutants of Arabidopsis, and tested their performance following inoculation with P. brassicae. Four mutants (pla1-iiα, pla1-iγ3, pla1-iii, ppla-iiiβ, ppla-iiiδ) developed more severe clubroot than the wild-type, suggesting increased susceptibility to P. brassicae. The homologs of these Arabidopsis PLAs (AtPLAs) in B. napus (BnPLAs) were identified through Blast searches and phylogenic analysis. Expression of the BnPLAs was subsequently examined in transcriptomic datasets generated from canola infected by P. brassicae, and promising candidates for further characterization identified.
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Zhu Y, Hu X, Wang P, Gao L, Pei Y, Ge Z, Ge X, Li F, Hou Y. GhPLP2 Positively Regulates Cotton Resistance to Verticillium Wilt by Modulating Fatty Acid Accumulation and Jasmonic Acid Signaling Pathway. FRONTIERS IN PLANT SCIENCE 2021; 12:749630. [PMID: 34795685 PMCID: PMC8593000 DOI: 10.3389/fpls.2021.749630] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 10/08/2021] [Indexed: 05/24/2023]
Abstract
Patatin-like proteins (PLPs) have non-specific lipid acyl hydrolysis (LAH) activity, which can hydrolyze membrane lipids into fatty acids and lysophospholipids. The vital role of PLPs in plant growth and abiotic stress has been well documented. However, the function of PLPs in plant defense responses against pathogens is still poorly understood. Here, we isolated and identified a novel cotton (Gossypium hirsutum) PLP gene GhPLP2. The expression of GhPLP2 was induced upon treatment with Verticillium dahliae, the signaling molecules jasmonic acid (JA) and ethylene (ETH) in cotton plants. Subcellular localization revealed that GhPLP2 was localized to the plasma membrane. GhPLP2-silenced cotton plants were more susceptible to infection by V. dahliae, while the overexpression of GhPLP2 in Arabidopsis enhanced its resistance to V. dahliae, which was apparent as mild symptoms, and a decrease in the disease index and fungal biomass. The hypersensitive response, deposition of callose, and H2O2 accumulation triggered by V. dahliae elicitor were reduced in GhPLP2-silenced cotton plants. The overexpression of GhPLP2 in Arabidopsis resulted in the accumulation of linoleic acid (LA, 18:2) and α-linolenic acid (ALA, 18:3) and facilitated the biosynthesis of JA and JA-mediated defensive responses. GhPLP2 silencing in cotton plants consistently reduced the accumulation of linoleic acid (LA, 18:2) and α-linolenic acid (ALA, 18:3) and suppressed the biosynthesis of JA and the defensive responses mediated by JA. These results indicate that GhPLP2 is involved in the resistance of cotton to V. dahliae by maintaining fatty acid metabolism pools for JA biosynthesis and activating the JA signaling pathway.
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Affiliation(s)
- Yutao Zhu
- College of Science, China Agricultural University, Beijing, China
| | - Xiaoqian Hu
- College of Science, China Agricultural University, Beijing, China
| | - Ping Wang
- College of Science, China Agricultural University, Beijing, China
| | - Linying Gao
- College of Science, China Agricultural University, Beijing, China
| | - Yakun Pei
- College of Science, China Agricultural University, Beijing, China
| | - Zhaoyue Ge
- College of Science, China Agricultural University, Beijing, China
| | - Xiaoyang Ge
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Fuguang Li
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Yuxia Hou
- College of Science, China Agricultural University, Beijing, China
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Zhu Y, Hu X, Wang P, Gao L, Pei Y, Ge Z, Ge X, Li F, Hou Y. GhPLP2 Positively Regulates Cotton Resistance to Verticillium Wilt by Modulating Fatty Acid Accumulation and Jasmonic Acid Signaling Pathway. FRONTIERS IN PLANT SCIENCE 2021; 12:749630. [PMID: 34795685 DOI: 10.21203/rs.3.rs-388437/v1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 10/08/2021] [Indexed: 05/25/2023]
Abstract
Patatin-like proteins (PLPs) have non-specific lipid acyl hydrolysis (LAH) activity, which can hydrolyze membrane lipids into fatty acids and lysophospholipids. The vital role of PLPs in plant growth and abiotic stress has been well documented. However, the function of PLPs in plant defense responses against pathogens is still poorly understood. Here, we isolated and identified a novel cotton (Gossypium hirsutum) PLP gene GhPLP2. The expression of GhPLP2 was induced upon treatment with Verticillium dahliae, the signaling molecules jasmonic acid (JA) and ethylene (ETH) in cotton plants. Subcellular localization revealed that GhPLP2 was localized to the plasma membrane. GhPLP2-silenced cotton plants were more susceptible to infection by V. dahliae, while the overexpression of GhPLP2 in Arabidopsis enhanced its resistance to V. dahliae, which was apparent as mild symptoms, and a decrease in the disease index and fungal biomass. The hypersensitive response, deposition of callose, and H2O2 accumulation triggered by V. dahliae elicitor were reduced in GhPLP2-silenced cotton plants. The overexpression of GhPLP2 in Arabidopsis resulted in the accumulation of linoleic acid (LA, 18:2) and α-linolenic acid (ALA, 18:3) and facilitated the biosynthesis of JA and JA-mediated defensive responses. GhPLP2 silencing in cotton plants consistently reduced the accumulation of linoleic acid (LA, 18:2) and α-linolenic acid (ALA, 18:3) and suppressed the biosynthesis of JA and the defensive responses mediated by JA. These results indicate that GhPLP2 is involved in the resistance of cotton to V. dahliae by maintaining fatty acid metabolism pools for JA biosynthesis and activating the JA signaling pathway.
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Affiliation(s)
- Yutao Zhu
- College of Science, China Agricultural University, Beijing, China
| | - Xiaoqian Hu
- College of Science, China Agricultural University, Beijing, China
| | - Ping Wang
- College of Science, China Agricultural University, Beijing, China
| | - Linying Gao
- College of Science, China Agricultural University, Beijing, China
| | - Yakun Pei
- College of Science, China Agricultural University, Beijing, China
| | - Zhaoyue Ge
- College of Science, China Agricultural University, Beijing, China
| | - Xiaoyang Ge
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Fuguang Li
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Yuxia Hou
- College of Science, China Agricultural University, Beijing, China
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Cavaco AR, Matos AR, Figueiredo A. Speaking the language of lipids: the cross-talk between plants and pathogens in defence and disease. Cell Mol Life Sci 2021; 78:4399-4415. [PMID: 33638652 PMCID: PMC11073031 DOI: 10.1007/s00018-021-03791-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 01/21/2021] [Accepted: 02/12/2021] [Indexed: 12/26/2022]
Abstract
Lipids and fatty acids play crucial roles in plant immunity, which have been highlighted over the past few decades. An increasing number of studies have shown that these molecules are pivotal in the interactions between plants and their diverse pathogens. The roles played by plant lipids fit in a wide spectrum ranging from the first physical barrier encountered by the pathogens, the cuticle, to the signalling pathways that trigger different immune responses and expression of defence-related genes, mediated by several lipid molecules. Moreover, lipids have been arising as candidate biomarkers of resistance or susceptibility to different pathogens. Studies on the apoplast and extracellular vesicles have been highlighting the possible role of lipids in the intercellular communication and the establishment of systemic acquired resistance during plant-pathogen interactions. From the pathogen perspective, lipid metabolism and specific lipid molecules play pivotal roles in the pathogen's life cycle completion, being crucial during recognition by the plant and evasion from the host immune system, therefore potentiating infection. Studies conducted in the last years have contributed to a better understanding of the language of lipids during the cross-talk between plants and pathogens. However, it is essential to continue exploring the knowledge brought up to light by transcriptomics and proteomics studies towards the elucidation of lipid signalling processes during defence and disease. In this review, we present an updated overview on lipids associated to plant-pathogen interactions, exploiting their roles from the two sides of this battle.
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Affiliation(s)
- Ana Rita Cavaco
- Biosystems and Integrative Sciences Institute (BioISI), Faculty of Science, University of Lisbon, Lisbon, Portugal
| | - Ana Rita Matos
- Biosystems and Integrative Sciences Institute (BioISI), Faculty of Science, University of Lisbon, Lisbon, Portugal
| | - Andreia Figueiredo
- Biosystems and Integrative Sciences Institute (BioISI), Faculty of Science, University of Lisbon, Lisbon, Portugal.
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Billah M, Li F, Yang Z. Regulatory Network of Cotton Genes in Response to Salt, Drought and Wilt Diseases ( Verticillium and Fusarium): Progress and Perspective. FRONTIERS IN PLANT SCIENCE 2021; 12:759245. [PMID: 34912357 PMCID: PMC8666531 DOI: 10.3389/fpls.2021.759245] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 10/13/2021] [Indexed: 05/11/2023]
Abstract
In environmental conditions, crop plants are extremely affected by multiple abiotic stresses including salinity, drought, heat, and cold, as well as several biotic stresses such as pests and pathogens. However, salinity, drought, and wilt diseases (e.g., Fusarium and Verticillium) are considered the most destructive environmental stresses to cotton plants. These cause severe growth interruption and yield loss of cotton. Since cotton crops are central contributors to total worldwide fiber production, and also important for oilseed crops, it is essential to improve stress tolerant cultivars to secure future sustainable crop production under adverse environments. Plants have evolved complex mechanisms to respond and acclimate to adverse stress conditions at both physiological and molecular levels. Recent progresses in molecular genetics have delivered new insights into the regulatory network system of plant genes, which generally includes defense of cell membranes and proteins, signaling cascades and transcriptional control, and ion uptake and transport and their relevant biochemical pathways and signal factors. In this review, we mainly summarize recent progress concerning several resistance-related genes of cotton plants in response to abiotic (salt and drought) and biotic (Fusarium and Verticillium wilt) stresses and classify them according to their molecular functions to better understand the genetic network. Moreover, this review proposes that studies of stress related genes will advance the security of cotton yield and production under a changing climate and that these genes should be incorporated in the development of cotton tolerant to salt, drought, and fungal wilt diseases (Verticillium and Fusarium).
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Affiliation(s)
- Masum Billah
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Fuguang Li
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- *Correspondence: Fuguang Li,
| | - Zhaoen Yang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, China
- Zhaoen Yang,
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11
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CaCML13 Acts Positively in Pepper Immunity Against Ralstonia solanacearum Infection Forming Feedback Loop with CabZIP63. Int J Mol Sci 2020; 21:ijms21114186. [PMID: 32545368 PMCID: PMC7312559 DOI: 10.3390/ijms21114186] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/08/2020] [Accepted: 06/09/2020] [Indexed: 01/04/2023] Open
Abstract
Ca2+-signaling—which requires the presence of calcium sensors such as calmodulin (CaM) and calmodulin-like (CML) proteins—is crucial for the regulation of plant immunity against pathogen attack. However, the underlying mechanisms remain elusive, especially the roles of CMLs involved in plant immunity remains largely uninvestigated. In the present study, CaCML13, a calmodulin-like protein of pepper that was originally found to be upregulated by Ralstonia solanacearum inoculation (RSI) in RNA-seq, was functionally characterized in immunity against RSI. CaCML13 was found to target the whole epidermal cell including plasma membrane, cytoplasm and nucleus. We also confirmed that CaCML13 was upregulated by RSI in pepper roots by quantitative real-time PCR (qRT-PCR). The silencing of CaCML13 significantly enhanced pepper plants’ susceptibility to RSI accompanied with downregulation of immunity-related CaPR1, CaNPR1, CaDEF1 and CabZIP63. In contrast, CaCML13 transient overexpression induced clear hypersensitivity-reaction (HR)-mimicked cell death and upregulation of the tested immunity-related genes. In addition, we also revealed that the G-box-containing CaCML13 promoter was bound by CabZIP63 and CaCML13 was positively regulated by CabZIP63 at transcriptional level. Our data collectively indicate that CaCML13 act as a positive regulator in pepper immunity against RSI forming a positive feedback loop with CabZIP63.
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Qiu A, Wu J, Lei Y, Cai Y, Wang S, Liu Z, Guan D, He S. CaSK23, a Putative GSK3/SHAGGY-Like Kinase of Capsicum annuum, Acts as a Negative Regulator of Pepper's Response to Ralstonia solanacearum Attack. Int J Mol Sci 2018; 19:ijms19092698. [PMID: 30208566 PMCID: PMC6163794 DOI: 10.3390/ijms19092698] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 08/31/2018] [Accepted: 09/03/2018] [Indexed: 12/14/2022] Open
Abstract
GSK3-like kinases have been mainly implicated in the brassinosteroids (BR) pathway and, therefore, in plant growth, development, and responses to abiotic stresses; however, their roles in plant immunity remain poorly understood. Herein, we present evidence that CaSK23, a putative GSK3/SHAGGY-like kinase in pepper, acts as a negative regulator in pepper’s response to Ralstonia solanacearum (R. solanacearum) inoculation (RSI). Data from quantitative RT-PCR (qRT-PCR) showed that the constitutively-expressed CaSK23 in pepper leaves was down-regulated by RSI, as well as by exogenously-applied salicylic acid (SA) or methyl jasomonate (MeJA). Silencing of CaSK23 by virus-induced gene silencing (VIGS) decreased the susceptibility of pepper plants to RSI, coupled with up-regulation of the tested genes encoding SA-, JA-, and ethylene (ET)-dependent pathogenesis-related (PR) proteins. In contrast, ectopic overexpression (OE) of CaSK23 conferred a compromised resistance of tobacco plants to RSI, accompanied by down-regulation of the tested immunity-associated SA-, JA-, and ET-dependent PR genes. In addition, transient overexpression of CaSK23 in pepper plants consistently led to down-regulation of the tested SA-, JA-, and ET-dependent PR genes. We speculate that CaSK23 acts as a negative regulator in pepper immunity and its constitutive expression represses pepper immunity in the absence of pathogens. On the other hand, its decreased expression derepresses immunity when pepper plants are attacked by pathogens.
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Affiliation(s)
- Ailian Qiu
- College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
- Key Laboratory of Crop Genetics and Breeding and Comprehensive Utilization, Ministry of Education/FAFU, Fuzhou 350002, China.
| | - Ji Wu
- College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
- Key Laboratory of Crop Genetics and Breeding and Comprehensive Utilization, Ministry of Education/FAFU, Fuzhou 350002, China.
| | - Yufen Lei
- Key Laboratory of Crop Genetics and Breeding and Comprehensive Utilization, Ministry of Education/FAFU, Fuzhou 350002, China.
| | - Yiting Cai
- Key Laboratory of Crop Genetics and Breeding and Comprehensive Utilization, Ministry of Education/FAFU, Fuzhou 350002, China.
| | - Song Wang
- Key Laboratory of Crop Genetics and Breeding and Comprehensive Utilization, Ministry of Education/FAFU, Fuzhou 350002, China.
| | - Zhiqin Liu
- Key Laboratory of Crop Genetics and Breeding and Comprehensive Utilization, Ministry of Education/FAFU, Fuzhou 350002, China.
| | - Deyi Guan
- Key Laboratory of Crop Genetics and Breeding and Comprehensive Utilization, Ministry of Education/FAFU, Fuzhou 350002, China.
| | - Shuilin He
- Key Laboratory of Crop Genetics and Breeding and Comprehensive Utilization, Ministry of Education/FAFU, Fuzhou 350002, China.
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NLR surveillance of essential SEC-9 SNARE proteins induces programmed cell death upon allorecognition in filamentous fungi. Proc Natl Acad Sci U S A 2018; 115:E2292-E2301. [PMID: 29463729 DOI: 10.1073/pnas.1719705115] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
In plants and metazoans, intracellular receptors that belong to the NOD-like receptor (NLR) family are major contributors to innate immunity. Filamentous fungal genomes contain large repertoires of genes encoding for proteins with similar architecture to plant and animal NLRs with mostly unknown function. Here, we identify and molecularly characterize patatin-like phospholipase-1 (PLP-1), an NLR-like protein containing an N-terminal patatin-like phospholipase domain, a nucleotide-binding domain (NBD), and a C-terminal tetratricopeptide repeat (TPR) domain. PLP-1 guards the essential SNARE protein SEC-9; genetic differences at plp-1 and sec-9 function to trigger allorecognition and cell death in two distantly related fungal species, Neurospora crassa and Podospora anserina Analyses of Neurospora population samples revealed that plp-1 and sec-9 alleles are highly polymorphic, segregate into discrete haplotypes, and show transspecies polymorphism. Upon fusion between cells bearing incompatible sec-9 and plp-1 alleles, allorecognition and cell death are induced, which are dependent upon physical interaction between SEC-9 and PLP-1. The central NBD and patatin-like phospholipase activity of PLP-1 are essential for allorecognition and cell death, while the TPR domain and the polymorphic SNARE domain of SEC-9 function in conferring allelic specificity. Our data indicate that fungal NLR-like proteins function similar to NLR immune receptors in plants and animals, showing that NLRs are major contributors to innate immunity in plants and animals and for allorecognition in fungi.
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Lim GH, Singhal R, Kachroo A, Kachroo P. Fatty Acid- and Lipid-Mediated Signaling in Plant Defense. ANNUAL REVIEW OF PHYTOPATHOLOGY 2017; 55:505-536. [PMID: 28777926 DOI: 10.1146/annurev-phyto-080516-035406] [Citation(s) in RCA: 199] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Fatty acids and lipids, which are major and essential constituents of all plant cells, not only provide structural integrity and energy for various metabolic processes but can also function as signal transduction mediators. Lipids and fatty acids can act as both intracellular and extracellular signals. In addition, cyclic and acyclic products generated during fatty acid metabolism can also function as important chemical signals. This review summarizes the biosynthesis of fatty acids and lipids and their involvement in pathogen defense.
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Affiliation(s)
- Gah-Hyun Lim
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546;
| | - Richa Singhal
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546;
| | - Aardra Kachroo
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546;
| | - Pradeep Kachroo
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546;
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Widana Gamage SMK, McGrath DJ, Persley DM, Dietzgen RG. Transcriptome Analysis of Capsicum Chlorosis Virus-Induced Hypersensitive Resistance Response in Bell Capsicum. PLoS One 2016; 11:e0159085. [PMID: 27398596 PMCID: PMC4939944 DOI: 10.1371/journal.pone.0159085] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 06/27/2016] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Capsicum chlorosis virus (CaCV) is an emerging pathogen of capsicum, tomato and peanut crops in Australia and South-East Asia. Commercial capsicum cultivars with CaCV resistance are not yet available, but CaCV resistance identified in Capsicum chinense is being introgressed into commercial Bell capsicum. However, our knowledge of the molecular mechanisms leading to the resistance response to CaCV infection is limited. Therefore, transcriptome and expression profiling data provide an important resource to better understand CaCV resistance mechanisms. METHODOLOGY/PRINCIPAL FINDINGS We assembled capsicum transcriptomes and analysed gene expression using Illumina HiSeq platform combined with a tag-based digital gene expression system. Total RNA extracted from CaCV/mock inoculated CaCV resistant (R) and susceptible (S) capsicum at the time point when R line showed a strong hypersensitive response to CaCV infection was used in transcriptome assembly. Gene expression profiles of R and S capsicum in CaCV- and buffer-inoculated conditions were compared. None of the genes were differentially expressed (DE) between R and S cultivars when mock-inoculated, while 2484 genes were DE when inoculated with CaCV. Functional classification revealed that the most highly up-regulated DE genes in R capsicum included pathogenesis-related genes, cell death-associated genes, genes associated with hormone-mediated signalling pathways and genes encoding enzymes involved in synthesis of defense-related secondary metabolites. We selected 15 genes to confirm DE expression levels by real-time quantitative PCR. CONCLUSION/SIGNIFICANCE DE transcript profiling data provided comprehensive gene expression information to gain an understanding of the underlying CaCV resistance mechanisms. Further, we identified candidate CaCV resistance genes in the CaCV-resistant C. annuum x C. chinense breeding line. This knowledge will be useful in future for fine mapping of the CaCV resistance locus and potential genetic engineering of resistance into CaCV-susceptible crops.
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Affiliation(s)
- Shirani M. K. Widana Gamage
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, Queensland, Australia
| | - Desmond J. McGrath
- Queensland Department of Agriculture and Fisheries, AgriScience Queensland, Gatton, Queensland, Australia
| | - Denis M. Persley
- Queensland Department of Agriculture and Fisheries, AgriScience Queensland, EcoSciences Precinct, Dutton Park, Queensland, Australia
| | - Ralf G. Dietzgen
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, Queensland, Australia
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Lamacchia M, Dyrka W, Breton A, Saupe SJ, Paoletti M. Overlapping Podospora anserina Transcriptional Responses to Bacterial and Fungal Non Self Indicate a Multilayered Innate Immune Response. Front Microbiol 2016; 7:471. [PMID: 27148175 PMCID: PMC4835503 DOI: 10.3389/fmicb.2016.00471] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 03/21/2016] [Indexed: 11/13/2022] Open
Abstract
Recognition and response to non self is essential to development and survival of all organisms. It can occur between individuals of the same species or between different organisms. Fungi are established models for conspecific non self recognition in the form of vegetative incompatibility (VI), a genetically controlled process initiating a programmed cell death (PCD) leading to the rejection of a fusion cell between genetically different isolates of the same species. In Podospora anserina VI is controlled by members of the hnwd gene family encoding for proteins analogous to NOD Like Receptors (NLR) immune receptors in eukaryotes. It was hypothesized that the hnwd controlled VI reaction was derived from the fungal innate immune response. Here we analyze the P. anserina transcriptional responses to two bacterial species, Serratia fonticola to which P. anserina survives and S. marcescens to which P. anserina succumbs, and compare these to the transcriptional response induced under VI conditions. Transcriptional responses to both bacteria largely overlap, however the number of genes regulated and magnitude of regulation is more important when P. anserina survives. Transcriptional responses to bacteria also overlap with the VI reaction for both up or down regulated gene sets. Genes up regulated tend to be clustered in the genome, and display limited phylogenetic distribution. In all three responses we observed genes related to autophagy to be up-regulated. Autophagy contributes to the fungal survival in all three conditions. Genes encoding for secondary metabolites and histidine kinase signaling are also up regulated in all three conditions. Transcriptional responses also display differences. Genes involved in response to oxidative stress, or encoding small secreted proteins are essentially expressed in response to bacteria, while genes encoding NLR proteins are expressed during VI. Most functions encoded in response to bacteria favor survival of the fungus while most functions up regulated during VI would lead to cell death. These differences are discussed in the frame of a multilayered response to non self in fungi.
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Affiliation(s)
- Marina Lamacchia
- Institut de Biologie et Génétique Cellulaire, UMR 5095, Centre National de la Recherche Scientifique et Université de Bordeaux Bordeaux, France
| | - Witold Dyrka
- Equipe MAGNOME, INRIA, Université de Bordeaux, Centre National de la Recherche ScientifiqueTalence, France; Department of Biomedical Engineering, Faculty of Fundamental Problems of Technology, Wroclaw University of TechnologyWroclaw, Poland
| | - Annick Breton
- Institut de Biologie et Génétique Cellulaire, UMR 5095, Centre National de la Recherche Scientifique et Université de Bordeaux Bordeaux, France
| | - Sven J Saupe
- Institut de Biologie et Génétique Cellulaire, UMR 5095, Centre National de la Recherche Scientifique et Université de Bordeaux Bordeaux, France
| | - Mathieu Paoletti
- Institut de Biologie et Génétique Cellulaire, UMR 5095, Centre National de la Recherche Scientifique et Université de Bordeaux Bordeaux, France
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Kumar D, Rampuria S, Singh NK, Kirti PB. A novel zinc-binding alcohol dehydrogenase 2 from Arachis diogoi, expressed in resistance responses against late leaf spot pathogen, induces cell death when transexpressed in tobacco. FEBS Open Bio 2016; 6:200-10. [PMID: 27047748 PMCID: PMC4794784 DOI: 10.1002/2211-5463.12040] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Revised: 12/11/2015] [Accepted: 01/08/2016] [Indexed: 12/26/2022] Open
Abstract
A novel zinc-binding alcohol dehydrogenase 2 (AdZADH2) was significantly upregulated in a wild peanut, Arachis diogoi treated with conidia of late leaf spot (LLS) pathogen, Phaeoisariopsis personata. This upregulation was not observed in a comparative analysis of cultivated peanut, which is highly susceptible to LLS. This zinc-binding alcohol dehydrogenase possessed a Rossmann fold containing NADB domain in addition to the MDR domain present in all previously characterized plant ADH genes/proteins. Transient over-expression of AdZADH2 under an estradiol inducible promoter (XVE) resulted in hypersensitive response (HR)-like cell death in tobacco leaf. However, the same level of cell death was not observed when the domains were transiently expressed individually. Cell death observed in tobacco was associated with overexpression of cell death related proteins, antioxidative enzymes such as SOD, CAT and APX and pathogenesis-related (PR) proteins. In A. diogoi, AdZADH2 expression was significantly upregulated in response to the plant signaling hormones salicylic acid, methyl jasmonate, and sodium nitroprusside.
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Affiliation(s)
- Dilip Kumar
- Department of Plant Sciences School of Life Sciences University of Hyderabad India
| | - Sakshi Rampuria
- Department of Plant Sciences School of Life Sciences University of Hyderabad India
| | - Naveen Kumar Singh
- Department of Plant Sciences School of Life Sciences University of Hyderabad India
| | - Pulugurtha B Kirti
- Department of Plant Sciences School of Life Sciences University of Hyderabad India
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Wang X, Liu YH, Hu DX, Balamurugan S, Lu Y, Yang WD, Liu JS, Li HY. Identification of a putative patatin-like phospholipase domain-containing protein 3 (PNPLA3) ortholog involved in lipid metabolism in microalga Phaeodactylum tricornutum. ALGAL RES 2015. [DOI: 10.1016/j.algal.2015.09.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Ruelland E, Kravets V, Derevyanchuk M, Martinec J, Zachowski A, Pokotylo I. Role of phospholipid signalling in plant environmental responses. ENVIRONMENTAL AND EXPERIMENTAL BOTANY 2015; 114:129-143. [PMID: 0 DOI: 10.1016/j.envexpbot.2014.08.009] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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Choi HW, Hwang BK. Molecular and cellular control of cell death and defense signaling in pepper. PLANTA 2015; 241:1-27. [PMID: 25252816 DOI: 10.1007/s00425-014-2171-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Accepted: 09/11/2014] [Indexed: 06/03/2023]
Abstract
Pepper (Capsicum annuum L.) provides a good experimental system for studying the molecular and functional genomics underlying the ability of plants to defend themselves against microbial pathogens. Cell death is a genetically programmed response that requires specific host cellular factors. Hypersensitive response (HR) is defined as rapid cell death in response to a pathogen attack. Pepper plants respond to pathogen attacks by activating genetically controlled HR- or disease-associated cell death. HR cell death, specifically in incompatible interactions between pepper and Xanthomonas campestris pv. vesicatoria, is mediated by the molecular genetics and biochemical machinery that underlie pathogen-induced cell death in plants. Gene expression profiles during the HR-like cell death response, virus-induced gene silencing and transient and transgenic overexpression approaches are used to isolate and identify HR- or disease-associated cell death genes in pepper plants. Reactive oxygen species, nitric oxide, cytosolic calcium ion and defense-related hormones such as salicylic acid, jasmonic acid, ethylene and abscisic acid are involved in the execution of pathogen-induced cell death in plants. In this review, we summarize recent molecular and cellular studies of the pepper cell death-mediated defense response, highlighting the signaling events of cell death in disease-resistant pepper plants. Comprehensive knowledge and understanding of the cellular functions of pepper cell death response genes will aid the development of novel practical approaches to enhance disease resistance in pepper, thereby helping to secure the future supply of safe and nutritious pepper plants worldwide.
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Affiliation(s)
- Hyong Woo Choi
- Laboratory of Molecular Plant Pathology, College of Life Sciences and Biotechnology, Korea University, Anam-dong, Sungbuk-ku, Seoul, 136-713, Republic of Korea
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Zhang Z, Yang F, Na R, Zhang X, Yang S, Gao J, Fan M, Zhao Y, Zhao J. AtROP1 negatively regulates potato resistance to Phytophthora infestans via NADPH oxidase-mediated accumulation of H2O2. BMC PLANT BIOLOGY 2014; 14:392. [PMID: 25547733 PMCID: PMC4323192 DOI: 10.1186/s12870-014-0392-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 12/19/2014] [Indexed: 05/11/2023]
Abstract
BACKGROUND Small GTPases are monomeric guanine nucleotide-binding proteins. In plants, ROPs regulate plant cell polarity, plant cell differentiation and development as well as biotic and abiotic stress signaling pathways. RESULTS We report the subcellular localization of the AtRop1 protein at the plasma membrane in tobacco epidermal cells using GFP fusions. Additionally, transient and stable expression of a dominant negative form (DN) of the Arabidopsis AtRop1 in potato led to H2O2 accumulation associated with the reduced development of Phytophthora infestans Montagne de Bary and smaller lesions on infected potato leaves. The expression of the Strboh-D gene, a NADPH oxidase homologue in potato, was analyzed by RT-PCR. Expression of this gene was maintained in DN-AtRop1 transgenic plants after infection with P. infestans. In transgenic potato lines, the transcript levels of salicylic acid (SA) and jasmonic acid (JA) marker genes (Npr1 and Lox, respectively) were analyzed. The Lox gene was induced dramatically whereas expression of Npr1, a gene up-regulated by SA, decreased slightly in DN-AtRop1 transgenic plants after infection with P. infestans. CONCLUSIONS In conclusion, our results indicate that DN-AtROP1 affects potato resistance to P. infestans. This is associated with increased NADPH oxidase-mediated H2O2 production and JA signaling.
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Affiliation(s)
- Zhiwei Zhang
- Department of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia, 010019, China.
| | - Fan Yang
- Department of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia, 010019, China.
| | - Ren Na
- Department of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia, 010019, China.
| | - Xiaoluo Zhang
- Department of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia, 010019, China.
| | - Shuqing Yang
- Department of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia, 010019, China.
| | - Jing Gao
- Department of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia, 010019, China.
| | - Mingshou Fan
- Department of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia, 010019, China.
| | - Yan Zhao
- Institutes of Genetics and Developmental Biology, Chinese Academy of Science, Beijing, 100101, China.
| | - Jun Zhao
- Department of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia, 010019, China.
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Dyrka W, Lamacchia M, Durrens P, Kobe B, Daskalov A, Paoletti M, Sherman DJ, Saupe SJ. Diversity and variability of NOD-like receptors in fungi. Genome Biol Evol 2014; 6:3137-58. [PMID: 25398782 PMCID: PMC4986451 DOI: 10.1093/gbe/evu251] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Nucleotide-binding oligomerization domain (NOD)-like receptors (NLRs) are intracellular receptors that control innate immunity and other biotic interactions in animals and plants. NLRs have been characterized in plant and animal lineages, but in fungi, this gene family has not been systematically described. There is however previous indications of the involvement of NLR-like genes in nonself recognition and programmed cell death in fungi. We have analyzed 198 fungal genomes for the presence of NLRs and have annotated a total of 5,616 NLR candidates. We describe their phylogenetic distribution, domain organization, and evolution. Fungal NLRs are characterized by a great diversity of domain organizations, suggesting frequently occurring combinatorial assortments of different effector, NOD and repeat domains. The repeat domains are of the WD, ANK, and TPR type; no LRR motifs were found. As previously documented for WD-repeat domains of fungal NLRs, TPR, and ANK repeats evolve under positive selection and show highly conserved repeats and repeat length polymorphism, suggesting the possibility of concerted evolution of these repeats. We identify novel effector domains not previously found associated with NLRs, whereas others are related to effector domains of plant or animals NLRs. In particular, we show that the HET domain found in fungal NLRs may be related to Toll/interleukin-1 receptor domains found in animal and plant immune receptors. This description of fungal NLR repertoires reveals both similarities and differences with plant and animals NLR collections, highlights the importance of domain reassortment and repeat evolution and provides a novel entry point to explore the evolution of NLRs in eukaryotes.
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Affiliation(s)
- Witold Dyrka
- INRIA-Université Bordeaux-CNRS, MAGNOME, Talence, France
| | - Marina Lamacchia
- Institut de Biochimie et de Génétique Cellulaire, UMR 5095, CNRS-Université de Bordeaux, France
| | - Pascal Durrens
- INRIA-Université Bordeaux-CNRS, MAGNOME, Talence, France
| | - Bostjan Kobe
- School of Chemistry and Molecular Biosciences, Institute for Molecular Bioscience and Centre for Infectious Disease Research, University of Queensland, Brisbane, Queensland, Australia
| | - Asen Daskalov
- Institut de Biochimie et de Génétique Cellulaire, UMR 5095, CNRS-Université de Bordeaux, France
| | - Matthieu Paoletti
- Institut de Biochimie et de Génétique Cellulaire, UMR 5095, CNRS-Université de Bordeaux, France
| | | | - Sven J Saupe
- Institut de Biochimie et de Génétique Cellulaire, UMR 5095, CNRS-Université de Bordeaux, France
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