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Su R, Luo J, Wang Y, Xiao Y, Liu X, Deng H, Lu X, Chen Q, Chen G, Tang W, Zhang G. GDSL Lipase Gene HTA1 Negatively Regulates Heat Tolerance in Rice Seedlings by Regulating Reactive Oxygen Species Accumulation. Antioxidants (Basel) 2024; 13:592. [PMID: 38790697 PMCID: PMC11117967 DOI: 10.3390/antiox13050592] [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: 03/26/2024] [Revised: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 05/26/2024] Open
Abstract
High temperature is a significant environmental stress that limits plant growth and agricultural productivity. GDSL lipase is a hydrolytic enzyme with a conserved GDSL sequence at the N-terminus, which has various biological functions, such as participating in plant growth, development, lipid metabolism, and stress resistance. However, little is known about the function of the GDSL lipase gene in the heat tolerance of rice. Here, we characterized a lipase family protein coding gene HTA1, which was significantly induced by high temperature in rice. Rice seedlings in which the mutant hta1 was knocked out showed enhanced heat tolerance, whereas the overexpressing HTA1 showed more sensitivity to heat stress. Under heat stress, hta1 could reduce plant membrane damage and reactive oxygen species (ROS) levels and elevate the activity of antioxidant enzymes. Moreover, real-time quantitative PCR (RT-qPCR) analysis showed that mutant hta1 significantly activated gene expression in antioxidant enzymes, heat response, and defense. In conclusion, our results suggest that HTA1 negatively regulates heat stress tolerance by modulating the ROS accumulation and the expression of heat-responsive and defense-related genes in rice seedlings. This research will provide a valuable resource for utilizing HTA1 to improve crop heat tolerance.
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Affiliation(s)
- Rui Su
- College of Agronomy, Hunan Agricultural University, Changsha 410000, China; (R.S.); (J.L.); (Y.W.); (Y.X.); (X.L.); (H.D.); (X.L.); (Q.C.); (G.C.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Changsha 410000, China
| | - Jingkai Luo
- College of Agronomy, Hunan Agricultural University, Changsha 410000, China; (R.S.); (J.L.); (Y.W.); (Y.X.); (X.L.); (H.D.); (X.L.); (Q.C.); (G.C.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Changsha 410000, China
| | - Yingfeng Wang
- College of Agronomy, Hunan Agricultural University, Changsha 410000, China; (R.S.); (J.L.); (Y.W.); (Y.X.); (X.L.); (H.D.); (X.L.); (Q.C.); (G.C.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Changsha 410000, China
| | - Yunhua Xiao
- College of Agronomy, Hunan Agricultural University, Changsha 410000, China; (R.S.); (J.L.); (Y.W.); (Y.X.); (X.L.); (H.D.); (X.L.); (Q.C.); (G.C.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Changsha 410000, China
| | - Xiong Liu
- College of Agronomy, Hunan Agricultural University, Changsha 410000, China; (R.S.); (J.L.); (Y.W.); (Y.X.); (X.L.); (H.D.); (X.L.); (Q.C.); (G.C.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Changsha 410000, China
| | - Huabing Deng
- College of Agronomy, Hunan Agricultural University, Changsha 410000, China; (R.S.); (J.L.); (Y.W.); (Y.X.); (X.L.); (H.D.); (X.L.); (Q.C.); (G.C.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Changsha 410000, China
| | - Xuedan Lu
- College of Agronomy, Hunan Agricultural University, Changsha 410000, China; (R.S.); (J.L.); (Y.W.); (Y.X.); (X.L.); (H.D.); (X.L.); (Q.C.); (G.C.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Changsha 410000, China
| | - Qiuhong Chen
- College of Agronomy, Hunan Agricultural University, Changsha 410000, China; (R.S.); (J.L.); (Y.W.); (Y.X.); (X.L.); (H.D.); (X.L.); (Q.C.); (G.C.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Changsha 410000, China
| | - Guihua Chen
- College of Agronomy, Hunan Agricultural University, Changsha 410000, China; (R.S.); (J.L.); (Y.W.); (Y.X.); (X.L.); (H.D.); (X.L.); (Q.C.); (G.C.)
| | - Wenbang Tang
- College of Agronomy, Hunan Agricultural University, Changsha 410000, China; (R.S.); (J.L.); (Y.W.); (Y.X.); (X.L.); (H.D.); (X.L.); (Q.C.); (G.C.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Changsha 410000, China
- Hunan Hybrid Rice Research Center, Hunan Academy of Agricultural Sciences, Changsha 410000, China
- State Key Laboratory of Hybrid Rice, Changsha 410000, China
| | - Guilian Zhang
- College of Agronomy, Hunan Agricultural University, Changsha 410000, China; (R.S.); (J.L.); (Y.W.); (Y.X.); (X.L.); (H.D.); (X.L.); (Q.C.); (G.C.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Changsha 410000, China
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Dong Q, Duan D, Wang F, Yang K, Song Y, Wang Y, Wang D, Ji Z, Xu C, Jia P, Luan H, Guo S, Qi G, Mao K, Zhang X, Tian Y, Ma Y, Ma F. The MdVQ37-MdWRKY100 complex regulates salicylic acid content and MdRPM1 expression to modulate resistance to Glomerella leaf spot in apples. PLANT BIOTECHNOLOGY JOURNAL 2024. [PMID: 38683692 DOI: 10.1111/pbi.14351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 01/26/2024] [Accepted: 03/29/2024] [Indexed: 05/02/2024]
Abstract
Glomerella leaf spot (GLS), caused by the fungus Colletotrichum fructicola, is considered one of the most destructive diseases affecting apples. The VQ-WRKY complex plays a crucial role in the response of plants to biotic stresses. However, our understanding of the defensive role of the VQ-WRKY complex on woody plants, particularly apples, under biotic stress, remains limited. In this study, we elucidated the molecular mechanisms underlying the defensive role of the apple MdVQ37-MdWRKY100 module in response to GLS infection. The overexpression of MdWRKY100 enhanced resistance to C. fructicola, whereas MdWRKY100 RNA interference in apple plants reduced resistance to C. fructicola by affecting salicylic acid (SA) content and the expression level of the CC-NBS-LRR resistance gene MdRPM1. DAP-seq, Y1H, EMSA, and RT-qPCR assays indicated that MdWRKY100 inhibited the expression of MdWRKY17, a positive regulatory factor gene of SA degradation, upregulated the expression of MdPAL1, a key enzyme gene of SA biosynthesis, and promoted MdRPM1 expression by directly binding to their promotors. Transient overexpression and silencing experiments showed that MdPAL1 and MdRPM1 positively regulated GLS resistance in apples. Furthermore, the overexpression of MdVQ37 increased the susceptibility to C. fructicola by reducing the SA content and expression level of MdRPM1. Additionally, MdVQ37 interacted with MdWRKY100, which repressed the transcriptional activity of MdWRKY100. In summary, these results revealed the molecular mechanism through which the apple MdVQ37-MdWRKY100 module responds to GLS infection by regulating SA content and MdRPM1 expression, providing novel insights into the involvement of the VQ-WRKY complex in plant pathogen defence responses.
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Affiliation(s)
- Qinglong Dong
- College of Forestry, Hebei Agricultural University, Baoding, China
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, China
| | - Dingyue Duan
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, China
| | - Feng Wang
- College of Horticulture, Shenyang Agricultural University, Shenyang, China
| | - Kaiyu Yang
- College of Forestry, Hebei Agricultural University, Baoding, China
| | - Yang Song
- College of Forestry, Hebei Agricultural University, Baoding, China
| | - Yongxu Wang
- College of Forestry, Hebei Agricultural University, Baoding, China
| | - Dajiang Wang
- Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng, China
| | - Zhirui Ji
- Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng, China
| | - Chengnan Xu
- College of Life Sciences, Yan'an University, Yan'an, Shaanxi, China
| | - Peng Jia
- College of Forestry, Hebei Agricultural University, Baoding, China
| | - Haoan Luan
- College of Forestry, Hebei Agricultural University, Baoding, China
| | - Suping Guo
- College of Forestry, Hebei Agricultural University, Baoding, China
| | - Guohui Qi
- College of Forestry, Hebei Agricultural University, Baoding, China
| | - Ke Mao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, China
| | - Xuemei Zhang
- College of Forestry, Hebei Agricultural University, Baoding, China
| | - Yi Tian
- College of Horticulture, Hebei Agricultural University, Baoding, China
| | - Yue Ma
- College of Horticulture, Shenyang Agricultural University, Shenyang, China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling, China
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Wang H, Chen Q, Feng W. The Emerging Role of 2OGDs as Candidate Targets for Engineering Crops with Broad-Spectrum Disease Resistance. PLANTS (BASEL, SWITZERLAND) 2024; 13:1129. [PMID: 38674537 PMCID: PMC11054871 DOI: 10.3390/plants13081129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 04/09/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024]
Abstract
Plant diseases caused by pathogens result in a marked decrease in crop yield and quality annually, greatly threatening food production and security worldwide. The creation and cultivation of disease-resistant cultivars is one of the most effective strategies to control plant diseases. Broad-spectrum resistance (BSR) is highly preferred by breeders because it confers plant resistance to diverse pathogen species or to multiple races or strains of one species. Recently, accumulating evidence has revealed the roles of 2-oxoglutarate (2OG)-dependent oxygenases (2OGDs) as essential regulators of plant disease resistance. Indeed, 2OGDs catalyze a large number of oxidative reactions, participating in the plant-specialized metabolism or biosynthesis of the major phytohormones and various secondary metabolites. Moreover, several 2OGD genes are characterized as negative regulators of plant defense responses, and the disruption of these genes via genome editing tools leads to enhanced BSR against pathogens in crops. Here, the recent advances in the isolation and identification of defense-related 2OGD genes in plants and their exploitation in crop improvement are comprehensively reviewed. Also, the strategies for the utilization of 2OGD genes as targets for engineering BSR crops are discussed.
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Affiliation(s)
- Han Wang
- School of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China;
- College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Qinghe Chen
- School of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China;
| | - Wanzhen Feng
- School of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China;
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Kou Y, Shi H, Qiu J, Tao Z, Wang W. Effectors and environment modulating rice blast disease: from understanding to effective control. Trends Microbiol 2024:S0966-842X(24)00072-6. [PMID: 38580607 DOI: 10.1016/j.tim.2024.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/08/2024] [Accepted: 03/13/2024] [Indexed: 04/07/2024]
Abstract
Rice blast is a highly destructive crop disease that requires the interplay of three essential factors: the virulent blast fungus, the susceptible rice plant, and favorable environmental conditions. Although previous studies have focused mainly on the pathogen and rice, recent research has shed light on the molecular mechanisms by which the blast fungus and environmental conditions regulate host resistance and contribute to blast disease outbreaks. This review summarizes significant achievements in understanding the sophisticated modulation of blast resistance by Magnaporthe oryzae effectors and the dual regulatory mechanisms by which environmental conditions influence rice resistance and virulence of the blast fungus. Furthermore, it emphasizes potential strategies for developing blast-resistant rice varieties to effectively control blast disease.
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Affiliation(s)
- Yanjun Kou
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China.
| | - Huanbin Shi
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Jiehua Qiu
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Zeng Tao
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China.
| | - Wenming Wang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China.
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Xie S, Luo H, Huang W, Jin W, Dong Z. Striking a growth-defense balance: Stress regulators that function in maize development. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2024; 66:424-442. [PMID: 37787439 DOI: 10.1111/jipb.13570] [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: 08/27/2023] [Accepted: 10/01/2023] [Indexed: 10/04/2023]
Abstract
Maize (Zea mays) cultivation is strongly affected by both abiotic and biotic stress, leading to reduced growth and productivity. It has recently become clear that regulators of plant stress responses, including the phytohormones abscisic acid (ABA), ethylene (ET), and jasmonic acid (JA), together with reactive oxygen species (ROS), shape plant growth and development. Beyond their well established functions in stress responses, these molecules play crucial roles in balancing growth and defense, which must be finely tuned to achieve high yields in crops while maintaining some level of defense. In this review, we provide an in-depth analysis of recent research on the developmental functions of stress regulators, focusing specifically on maize. By unraveling the contributions of these regulators to maize development, we present new avenues for enhancing maize cultivation and growth while highlighting the potential risks associated with manipulating stress regulators to enhance grain yields in the face of environmental challenges.
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Affiliation(s)
- Shiyi Xie
- Maize Engineering and Technology Research Center of Hunan Province, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
- State Key Laboratory of Maize Bio-breeding, National Maize Improvement Center, Frontiers Science Center for Molecular Design Breeding, China Agricultural University, Beijing, 100193, China
| | - Hongbing Luo
- Maize Engineering and Technology Research Center of Hunan Province, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
| | - Wei Huang
- State Key Laboratory of Maize Bio-breeding, National Maize Improvement Center, Frontiers Science Center for Molecular Design Breeding, China Agricultural University, Beijing, 100193, China
| | - Weiwei Jin
- State Key Laboratory of Maize Bio-breeding, National Maize Improvement Center, Frontiers Science Center for Molecular Design Breeding, China Agricultural University, Beijing, 100193, China
- Tianjin Key Laboratory of Intelligent Breeding of Major Crops, Fresh Corn Research Center of BTH, College of Agronomy & Resources and Environment, Tianjin Agricultural University, Tianjin, 300384, China
| | - Zhaobin Dong
- State Key Laboratory of Maize Bio-breeding, National Maize Improvement Center, Frontiers Science Center for Molecular Design Breeding, China Agricultural University, Beijing, 100193, China
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Su P, Wang D, Wang P, Gao Y, Jia H, Hou J, Wu L. In vitro regeneration, photomorphogenesis and light signaling gene expression in Hydrangea quercifolia cv. 'Harmony' under different LED environments. PLANTA 2024; 259:71. [PMID: 38353793 DOI: 10.1007/s00425-024-04335-z] [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: 10/23/2023] [Accepted: 01/07/2024] [Indexed: 02/16/2024]
Abstract
MAIN CONCLUSION Plant growth regulators, sucrose concentration, and light quality significantly impact in vitro regeneration of 'Harmony'. Blue light promotes photomorphogenesis by enhancing light energy utilization, adjusting transcription of light signal genes, and altering hormone levels. Hydrangea quercifolia cv. 'Harmony', celebrated for lush green foliage and clusters of white flowers, has been extensively researched for its regenerative properties. Regeneration in stem segments, leaves, and petioles is facilitated by exogenous auxin and cytokinins (CTKs), with the concentration of sucrose (SC) being a key determinant for shoot regeneration from leaves. The study also highlights the significant impact of light conditions on photomorphogenesis. With an increase in the proportion of red (R) light, there is an inhibitory effect, leading to a reduction in leaf area, a decrease in the quantum yield of PSII (ΦPSII), and an increase in non-photochemical quenching (ΦNPQ) and non-regulated energy dissipation in PSII (ΦNO). Conversely, blue (B) light enhances growth, characterized by an increase in leaf area, elevated ΦPSII, and stable ΦNPQ and ΦNO levels. Additionally, B light induces the upregulation of HqCRYs, HqHY5-like, HqXTH27-like, and HqPHYs genes, along with an increase in endogenous CTKs levels, which positively influence photomorphogenesis independent of HqHY5-like regulation. This light condition also suppresses the synthesis of endogenous gibberellins (GA) and brassinosteroids (BR), further facilitating photomorphogenesis. In essence, B light is fundamental in expediting photomorphogenesis in 'Harmony', demonstrating the vital role in plant growth and development.
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Affiliation(s)
- Pengfei Su
- The Center for Ion Beam Bioengineering & Green Agriculture, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui, People's Republic of China
- School of Life Science, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China
| | - Dacheng Wang
- The Center for Ion Beam Bioengineering & Green Agriculture, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui, People's Republic of China
- School of Life Science, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China
| | - Ping Wang
- The Center for Ion Beam Bioengineering & Green Agriculture, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui, People's Republic of China
| | - Yameng Gao
- The Center for Ion Beam Bioengineering & Green Agriculture, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui, People's Republic of China
| | - Huiling Jia
- The Center for Ion Beam Bioengineering & Green Agriculture, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui, People's Republic of China
| | - Jinyan Hou
- The Center for Ion Beam Bioengineering & Green Agriculture, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui, People's Republic of China.
| | - Lifang Wu
- The Center for Ion Beam Bioengineering & Green Agriculture, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui, People's Republic of China.
- School of Life Science, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China.
- Zhongke Taihe Experimental Station, Taihe, 236626, Anhui, China.
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Chawla R, Poonia A, Samantara K, Mohapatra SR, Naik SB, Ashwath MN, Djalovic IG, Prasad PVV. Green revolution to genome revolution: driving better resilient crops against environmental instability. Front Genet 2023; 14:1204585. [PMID: 37719711 PMCID: PMC10500607 DOI: 10.3389/fgene.2023.1204585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 08/11/2023] [Indexed: 09/19/2023] Open
Abstract
Crop improvement programmes began with traditional breeding practices since the inception of agriculture. Farmers and plant breeders continue to use these strategies for crop improvement due to their broad application in modifying crop genetic compositions. Nonetheless, conventional breeding has significant downsides in regard to effort and time. Crop productivity seems to be hitting a plateau as a consequence of environmental issues and the scarcity of agricultural land. Therefore, continuous pursuit of advancement in crop improvement is essential. Recent technical innovations have resulted in a revolutionary shift in the pattern of breeding methods, leaning further towards molecular approaches. Among the promising approaches, marker-assisted selection, QTL mapping, omics-assisted breeding, genome-wide association studies and genome editing have lately gained prominence. Several governments have progressively relaxed their restrictions relating to genome editing. The present review highlights the evolutionary and revolutionary approaches that have been utilized for crop improvement in a bid to produce climate-resilient crops observing the consequence of climate change. Additionally, it will contribute to the comprehension of plant breeding succession so far. Investing in advanced sequencing technologies and bioinformatics will deepen our understanding of genetic variations and their functional implications, contributing to breakthroughs in crop improvement and biodiversity conservation.
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Affiliation(s)
- Rukoo Chawla
- Department of Genetics and Plant Breeding, Maharana Pratap University of Agriculture and Technology, Udaipur, Rajasthan, India
| | - Atman Poonia
- Department of Genetics and Plant Breeding, Chaudhary Charan Singh Haryana Agricultural University, Bawal, Haryana, India
| | - Kajal Samantara
- Institute of Technology, University of Tartu, Tartu, Estonia
| | - Sourav Ranjan Mohapatra
- Department of Forest Biology and Tree Improvement, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India
| | - S. Balaji Naik
- Institute of Integrative Biology and Systems, University of Laval, Quebec City, QC, Canada
| | - M. N. Ashwath
- Department of Forest Biology and Tree Improvement, Kerala Agricultural University, Thrissur, Kerala, India
| | - Ivica G. Djalovic
- Institute of Field and Vegetable Crops, National Institute of the Republic of Serbia, Novi Sad, Serbia
| | - P. V. Vara Prasad
- Department of Agronomy, Kansas State University, Manhattan, KS, United States
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Wu T, Bi Y, Yu Y, Zhou Z, Yuan B, Ding X, Zhang Q, Chen X, Yang H, Liu H, Chu Z. Activated Expression of Rice DMR6-like Gene OsS3H Partially Explores the Susceptibility to Bacterial Leaf Streak Mediated by Knock-Out OsF3H04g. Int J Mol Sci 2023; 24:13263. [PMID: 37686066 PMCID: PMC10487387 DOI: 10.3390/ijms241713263] [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: 07/05/2023] [Revised: 08/09/2023] [Accepted: 08/15/2023] [Indexed: 09/10/2023] Open
Abstract
Downy Mildew Resistance 6-like (DMR6-like) genes are identified as salicylic acid (SA) hydroxylases and negative regulators of plant immunity. Previously, we identified two rice DMR6-like genes, OsF3H03g, and OsF3H04g, that act as susceptible targets of transcription activator-like effectors (TALEs) from Xanthomonas oryzae pv. oryzicola (Xoc), which causes bacterial leaf streak (BLS) in rice. Furthermore, all four homologs of rice DMR6-like proteins were identified to predominantly carry the enzyme activity of SA 5-hydroxylase (S5H), negatively regulate rice broad-spectrum resistance, and cause the loss of function of these OsDMR6s, leading to increased resistance to rice blast and bacterial blight (BB). Here, we curiously found that an OsF3H04g knock-out mutant created by T-DNA insertion, osf3h04g, was remarkedly susceptible to BLS and BB and showed an extreme reduction in SA content. OsF3H04g knock-out rice lines produced by gene-editing were mildly susceptible to BLS and reduced content of SA. To explore the susceptibility mechanism in OsF3H04g loss-of-function rice lines, transcriptome sequencing revealed that another homolog, OsS3H, had induced expression in the loss-of-function OsF3H04g rice lines. Furthermore, we confirmed that a great induction of OsS3H downstream and genomically adjacent to OsF3H04g in osf3h04g was primarily related to the inserted T-DNA carrying quadruple enhancer elements of 35S, while a slight induction was caused by an unknown mechanism in gene-editing lines. Then, we found that the overexpression of OsS3H increased rice susceptibility to BLS, while gene-editing mediated the loss-of-function OsS3H enhanced rice resistance to BLS. However, the knock-out of both OsF3H04g and OsS3H by gene-editing only neutralized rice resistance to BLS. Thus, we concluded that the knock-out of OsF3H04g activated the expression of the OsS3H, partially participating in the susceptibility to BLS in rice.
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Affiliation(s)
- Tao Wu
- College of Plant Protection, Yangzhou University, Yangzhou 225009, China; (T.W.); (Q.Z.)
| | - Yunya Bi
- State Key Laboratory of Hybrid Rice, Hubei Hongshan Laboratory, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.B.); (Y.Y.); (Z.Z.); (X.C.)
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan 430062, China;
| | - Yue Yu
- State Key Laboratory of Hybrid Rice, Hubei Hongshan Laboratory, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.B.); (Y.Y.); (Z.Z.); (X.C.)
| | - Zhou Zhou
- State Key Laboratory of Hybrid Rice, Hubei Hongshan Laboratory, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.B.); (Y.Y.); (Z.Z.); (X.C.)
| | - Bin Yuan
- Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China;
| | - Xinhua Ding
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (X.D.); (H.L.)
| | - Qingxia Zhang
- College of Plant Protection, Yangzhou University, Yangzhou 225009, China; (T.W.); (Q.Z.)
| | - Xiangsong Chen
- State Key Laboratory of Hybrid Rice, Hubei Hongshan Laboratory, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.B.); (Y.Y.); (Z.Z.); (X.C.)
| | - Hong Yang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan 430062, China;
| | - Haifeng Liu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (X.D.); (H.L.)
| | - Zhaohui Chu
- State Key Laboratory of Hybrid Rice, Hubei Hongshan Laboratory, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.B.); (Y.Y.); (Z.Z.); (X.C.)
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