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Liang Y, Wang Z, Wang Q, Zhou X, Qian Y. The RING-Finger Protein NbRFP1 Contributes to Regulating the Host Hypersensitive Response Induced by Oat Dwarf Virus RepA. Int J Mol Sci 2023; 24:ijms24097697. [PMID: 37175403 PMCID: PMC10178201 DOI: 10.3390/ijms24097697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/13/2023] [Accepted: 04/18/2023] [Indexed: 05/15/2023] Open
Abstract
Our previous study identified that the RepA protein encoded by the oat dwarf virus (ODV) was responsible for inducing a strong hypersensitive response (HR) during the virus infection in non-host tobacco plants. However, little was known about the molecular mechanism of the RepA-elicited HR. Here, a RING-finger protein, which is described as NbRFP1 and is mainly located in the cytoplasm and nucleus in Nicotiana benthamiana cells, was confirmed to interact with RepA. In addition, the accumulation level of NbRFP1 in N. benthamiana leaves was enhanced by either ODV infection or by only RepA expression. The knockdown of NbRFP1 by a TRV-mediated virus-induced gene silencing markedly delayed the ODV or RepA-elicited HR. By contrast, the overexpression of NbRFP1 in N. benthamiana conferred enhanced resistance to ODV infection and promoted RepA-induced HR. Further mutation analysis showed that a RING-finger domain located in NbRFP1 plays important roles in modulating RepA-induced HR, as well as in mediating the interaction between NbRFP1 and RepA.
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Affiliation(s)
- Yanqing Liang
- Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Zhanqi Wang
- College of Life Science, Huzhou University, Huzhou 313000, China
| | - Qian Wang
- Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Xueping Zhou
- Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
- Department of Plant Protection, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Yajuan Qian
- Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
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RING-Type E3 Ubiquitin Ligases AtRDUF1 and AtRDUF2 Positively Regulate the Expression of PR1 Gene and Pattern-Triggered Immunity. Int J Mol Sci 2022; 23:ijms232314525. [PMID: 36498851 PMCID: PMC9739713 DOI: 10.3390/ijms232314525] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/18/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022] Open
Abstract
The importance of E3 ubiquitin ligases from different families for plant immune signaling has been confirmed. Plant RING-type E3 ubiquitin ligases are members of the E3 ligase superfamily and have been shown to play positive or negative roles during the regulation of various steps of plant immunity. Here, we present Arabidopsis RING-type E3 ubiquitin ligases AtRDUF1 and AtRDUF2 which act as positive regulators of flg22- and SA-mediated defense signaling. Expression of AtRDUF1 and AtRDUF2 is induced by pathogen-associated molecular patterns (PAMPs) and pathogens. The atrduf1 and atrduf2 mutants displayed weakened responses when triggered by PAMPs. Immune responses, including oxidative burst, mitogen-activated protein kinase (MAPK) activity, and transcriptional activation of marker genes, were attenuated in the atrduf1 and atrduf2 mutants. The suppressed activation of PTI responses also resulted in enhanced susceptibility to bacterial pathogens. Interestingly, atrduf1 and atrduf2 mutants showed defects in SA-mediated or pathogen-mediated PR1 expression; however, avirulent Pseudomonas syringae pv. tomato DC3000-induced cell death was unaffected. Our findings suggest that AtRDUF1 and AtRDUF2 are not just PTI-positive regulators but are also involved in SA-mediated PR1 gene expression, which is important for resistance to P. syringae.
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Alkemade JA, Nazzicari N, Messmer MM, Annicchiarico P, Ferrari B, Voegele RT, Finckh MR, Arncken C, Hohmann P. Genome-wide association study reveals white lupin candidate gene involved in anthracnose resistance. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2022; 135:1011-1024. [PMID: 34988630 PMCID: PMC8942938 DOI: 10.1007/s00122-021-04014-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 12/06/2021] [Indexed: 05/11/2023]
Abstract
GWAS identifies candidate gene controlling resistance to anthracnose disease in white lupin. White lupin (Lupinus albus L.) is a promising grain legume to meet the growing demand for plant-based protein. Its cultivation, however, is severely threatened by anthracnose disease caused by the fungal pathogen Colletotrichum lupini. To dissect the genetic architecture for anthracnose resistance, genotyping by sequencing was performed on white lupin accessions collected from the center of domestication and traditional cultivation regions. GBS resulted in 4611 high-quality single-nucleotide polymorphisms (SNPs) for 181 accessions, which were combined with resistance data observed under controlled conditions to perform a genome-wide association study (GWAS). Obtained disease phenotypes were shown to highly correlate with overall three-year disease assessments under Swiss field conditions (r > 0.8). GWAS results identified two significant SNPs associated with anthracnose resistance on gene Lalb_Chr05_g0216161 encoding a RING zinc-finger E3 ubiquitin ligase which is potentially involved in plant immunity. Population analysis showed a remarkably fast linkage disequilibrium decay, weak population structure and grouping of commercial varieties with landraces, corresponding to the slow domestication history and scarcity of modern breeding efforts in white lupin. Together with 15 highly resistant accessions identified in the resistance assay, our findings show promise for further crop improvement. This study provides the basis for marker-assisted selection, genomic prediction and studies aimed at understanding anthracnose resistance mechanisms in white lupin and contributes to improving breeding programs worldwide.
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Affiliation(s)
- Joris A Alkemade
- Department of Crop Sciences, Research Institute of Organic Agriculture (FiBL), Frick, Switzerland
| | - Nelson Nazzicari
- Research Centre for Animal Production and Aquaculture, CREA, Lodi, Italy
| | - Monika M Messmer
- Department of Crop Sciences, Research Institute of Organic Agriculture (FiBL), Frick, Switzerland.
| | | | - Barbara Ferrari
- Research Centre for Animal Production and Aquaculture, CREA, Lodi, Italy
| | - Ralf T Voegele
- Institute of Phytomedicine, University of Hohenheim, Stuttgart, Germany
| | - Maria R Finckh
- Department of Ecological Plant Protection, University of Kassel, Witzenhausen, Germany
| | - Christine Arncken
- Department of Crop Sciences, Research Institute of Organic Agriculture (FiBL), Frick, Switzerland
| | - Pierre Hohmann
- Department of Crop Sciences, Research Institute of Organic Agriculture (FiBL), Frick, Switzerland
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Liu Y, Tang Y, Tan X, Ding W. NtRNF217, Encoding a Putative RBR E3 Ligase Protein of Nicotiana tabacum, Plays an Important Role in the Regulation of Resistance to Ralstonia solanacearum Infection. Int J Mol Sci 2021; 22:5507. [PMID: 34073690 PMCID: PMC8197134 DOI: 10.3390/ijms22115507] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/16/2021] [Accepted: 04/20/2021] [Indexed: 01/22/2023] Open
Abstract
E3 ubiquitin ligases, the most important part of the ubiquitination process, participate in various processes of plant immune response. RBR E3 ligase is one of the E3 family members, but its functions in plant immunity are still little known. NtRNF217 is a RBR E3 ligase in tobacco based on the sequence analysis. To assess roles of NtRNF217 in tobacco responding to Ralstonia solanacearum, overexpression experiments in Nicotiana tabacum (Yunyan 87, a susceptible cultivar) were performed. The results illuminated that NtRNF217-overexpressed tobacco significantly reduced multiplication of R. solanacearum and inhibited the development of disease symptoms compared with wild-type plants. The accumulation of H2O2 and O2- in NtRNF217-OE plants was significantly higher than that in WT-Yunyan87 plants after pathogen inoculation. The activities of CAT and SOD also increased rapidly in a short time after R. solanacearum inoculation in NtRNF217-OE plants. What is more, overexpression of NtRNF217 enhanced the transcript levels of defense-related marker genes, such as NtEFE26, NtACC Oxidase, NtHIN1, NtHSR201, and NtSOD1 in NtRNF217-OE plants after R. solanacearum inoculation. The results suggested that NtRNF217 played an important role in regulating the expression of defense-related genes and the antioxidant enzymes, which resulted in resistance to R. solanacearum infection.
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Affiliation(s)
| | | | | | - Wei Ding
- College of Plant Protection, Southwest University, Chongqing 400715, China; (Y.L.); (Y.T.); (X.T.)
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Cloning and abiotic stress expression analysis of RING finger family protein gene SorRma1 from Solanum nigrum L. Biologia (Bratisl) 2019. [DOI: 10.2478/s11756-019-00297-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Mandal A, Sharma N, Muthamilarasan M, Prasad M. Ubiquitination: a tool for plant adaptation to changing environments. THE NUCLEUS 2018. [DOI: 10.1007/s13237-018-0255-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Zhong C, Ren Y, Qi Y, Yu X, Wu X, Tian Z. PAMP-responsive ATL gene StRFP1 and its orthologue NbATL60 positively regulate Phytophthora infestans resistance in potato and Nicotiana benthamiana. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 270:47-57. [PMID: 29576086 DOI: 10.1016/j.plantsci.2018.01.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 01/29/2018] [Accepted: 01/31/2018] [Indexed: 05/11/2023]
Abstract
Ubiquitination is a post-translational modification that plays a crucial role during the regulation of plant immune signalling. The plant ATL family consists of a large number of putative RING type ubiquitin ligases. We show that potato ATL family gene StRFP1 and its orthologue NbATL60 from N. benthamiana both respond to Phytophthora infestans culture filtrate (CF) and flg22 induction. StRFP1 positively regulates immunity against P. infestans in potato. Ectopic transient expression of StRFP1 or expression of NbATL60 in N. benthamiana also enhances late blight resistance. By contrast, silencing NbATL60 in N. benthamiana reduces late blight resistance and leads to plant growth inhibition. Both StRFP1 and NbATL60 localize to the plasma membrane and intracellular puncta and possess E3 Ligase activity in vitro. Furthermore we demonstrate that the RING finger domain mutants of StRFP1 and NbATL60 lost E3 ligase activity and fail to suppress P. infestans colonization in N. benthamiana, indicating that E3 ligase activity is critical for StRFP1 and NbATL60 to regulate immunity. Overexpression or RNA interference of StRFP1 in transgenic potato led to increased or decreased expression of PTI maker genes (WRKY7, WRKY8, ACRE31 and Pti5) respectively. Similarly silencing of NbATL60 in N. benthamiana decreases expression of these PTI marker genes. Moreover, VIGS of NbATL60 in N. benthamiana did not compromise P. infestans PAMP INF1 or R2/Avr2, R3a/AVR3a, Rx/Cp and Pto/AvrPto triggered cell death. These results indicate that ATL genes StRFP1 and NbATL60 contribute to basal immunity (PTI) in Solanaceous plants.
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Affiliation(s)
- Cheng Zhong
- Key Laboratory of Horticultural Plant Biology (HZAU), Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China; Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, People's Republic of China; Kaili University, Kaili, Guizhou, 556011, People's Republic of China.
| | - Yajuan Ren
- Key Laboratory of Horticultural Plant Biology (HZAU), Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China; Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, People's Republic of China.
| | - Yetong Qi
- Key Laboratory of Horticultural Plant Biology (HZAU), Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China; Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, People's Republic of China.
| | - Xiaoling Yu
- Key Laboratory of Horticultural Plant Biology (HZAU), Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China; Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, People's Republic of China.
| | - Xintong Wu
- Key Laboratory of Horticultural Plant Biology (HZAU), Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China; Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, People's Republic of China.
| | - Zhendong Tian
- Key Laboratory of Horticultural Plant Biology (HZAU), Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China; Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, People's Republic of China.
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Immunity-Associated Programmed Cell Death as a Tool for the Identification of Genes Essential for Plant Innate Immunity. Methods Mol Biol 2018. [PMID: 29332285 DOI: 10.1007/978-1-4939-7668-3_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Plants have evolved a sophisticated innate immune system to contend with potential infection by various pathogens. Understanding and manipulation of key molecular mechanisms that plants use to defend against various pathogens are critical for developing novel strategies in plant disease control. In plants, resistance to attempted pathogen infection is often associated with hypersensitive response (HR), a form of rapid programmed cell death (PCD) at the site of attempted pathogen invasion. In this chapter, we describe a method for rapid identification of genes that are essential for plant innate immunity. It combines virus-induced gene silencing (VIGS), a tool that is suitable for studying gene function in high-throughput, with the utilization of immunity-associated PCD, particularly HR-linked PCD as the readout of changes in plant innate immunity. The chapter covers from the design of gene fragment for VIGS, the agroinfiltration of the Nicotiana benthamian plants, to the use of immunity-associated PCD induced by twelve elicitors as the indicator of activation of plant immunity.
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Zhou B, Zeng L. Conventional and unconventional ubiquitination in plant immunity. MOLECULAR PLANT PATHOLOGY 2017; 18:1313-1330. [PMID: 27925369 PMCID: PMC6638253 DOI: 10.1111/mpp.12521] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/23/2016] [Accepted: 11/27/2016] [Indexed: 05/16/2023]
Abstract
Ubiquitination is one of the most abundant types of protein post-translational modification (PTM) in plant cells. The importance of ubiquitination in the regulation of many aspects of plant immunity has been increasingly appreciated in recent years. Most of the studies linking ubiquitination to the plant immune system, however, have been focused on the E3 ubiquitin ligases and the conventional ubiquitination that leads to the degradation of the substrate proteins by the 26S proteasome. By contrast, our knowledge about the role of unconventional ubiquitination that often serves as non-degradative, regulatory signal remains a significant gap. We discuss, in this review, the recent advances in our understanding of ubiquitination in the modulation of plant immunity, with a particular focus on the E3 ubiquitin ligases. We approach the topic from a perspective of two broadly defined types of ubiquitination in an attempt to highlight the importance, yet current scarcity, in our knowledge about the regulation of plant immunity by unconventional ubiquitination.
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Affiliation(s)
- Bangjun Zhou
- Center for Plant Science Innovation and Department of Plant PathologyUniversity of NebraskaLincolnNE68583USA
| | - Lirong Zeng
- Center for Plant Science Innovation and Department of Plant PathologyUniversity of NebraskaLincolnNE68583USA
- Southern Regional Collaborative Innovation Center for Grain and Oil CropsHunan Agricultural UniversityChangsha410128China
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