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Ouyang SQ, Ji HM, Feng T, Luo SJ, Cheng L, Wang N. Artificial trans-kingdom RNAi of FolRDR1 is a potential strategy to control tomato wilt disease. PLoS Pathog 2023; 19:e1011463. [PMID: 37339156 DOI: 10.1371/journal.ppat.1011463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 06/05/2023] [Indexed: 06/22/2023] Open
Abstract
Tomato is cultivated worldwide as a nutrient-rich vegetable crop. Tomato wilt disease caused by Fusarium oxysporum f.sp. Lycopersici (Fol) is one of the most serious fungal diseases posing threats to tomato production. Recently, the development of Spray-Induced Gene Silencing (SIGS) directs a novel plant disease management by generating an efficient and environmental friendly biocontrol agent. Here, we characterized that FolRDR1 (RNA-dependent RNA polymerase 1) mediated the pathogen invasion to the host plant tomato, and played as an essential regulator in pathogen development and pathogenicity. Our fluorescence tracing data further presented that effective uptakes of FolRDR1-dsRNAs were observed in both Fol and tomato tissues. Subsequently, exogenous application of FolRDR1-dsRNAs on pre-Fol-infected tomato leaves resulted in significant alleviation of tomato wilt disease symptoms. Particularly, FolRDR1-RNAi was highly specific without sequence off-target in related plants. Our results of pathogen gene-targeting RNAi have provided a new strategy for tomato wilt disease management by developing an environmentally-friendly biocontrol agent.
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Affiliation(s)
- Shou-Qiang Ouyang
- College of Life Sciences, Zhejiang Normal University, Jinhua, China
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Hui-Min Ji
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Tao Feng
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Shu-Jie Luo
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Lu Cheng
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Nan Wang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
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Feng T, Zhang ZY, Gao P, Feng ZM, Zuo SM, Ouyang SQ. Suppression of Rice Osa-miR444.2 Improves the Resistance to Sheath Blight in Rice Mediating through the Phytohormone Pathway. Int J Mol Sci 2023; 24:ijms24043653. [PMID: 36835070 PMCID: PMC9963240 DOI: 10.3390/ijms24043653] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/03/2023] [Accepted: 02/09/2023] [Indexed: 02/17/2023] Open
Abstract
MicroRNAs (miRNAs) are a class of conserved small RNA with a length of 21-24 nucleotides in eukaryotes, which are involved in development and defense responses against biotic and abiotic stresses. By RNA-seq, Osa-miR444b.2 was identified to be induced after Rhizoctonia solani (R. solani) infection. In order to clarify the function of Osa-miR444b.2 responding to R. solani infection in rice, transgenic lines over-expressing and knocking out Osa-miR444b.2 were generated in the background of susceptible cultivar Xu3 and resistant cultivar YSBR1, respectively. Over-expressing Osa-miR444b.2 resulted in compromised resistance to R. solani. In contrast, the knocking out Osa-miR444b.2 lines exhibited improved resistance to R. solani. Furthermore, knocking out Osa-miR444b.2 resulted in increased height, tillers, smaller panicle, and decreased 1000-grain weight and primary branches. However, the transgenic lines over-expressing Osa-miR444b.2 showed decreased primary branches and tillers, but increased panicle length. These results indicated that Osa-miR444b.2 was also involved in regulating the agronomic traits in rice. The RNA-seq assay revealed that Osa-miR444b.2 mainly regulated the resistance to rice sheath blight disease by affecting the expression of plant hormone signaling pathways-related genes such as ET and IAA, and transcription factors such as WRKYs and F-boxes. Together, our results suggest that Osa-miR444b.2 negatively mediated the resistance to R. solani in rice, which will contribute to the cultivation of sheath blight resistant varieties.
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Affiliation(s)
- Tao Feng
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Zhao-Yang Zhang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Peng Gao
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Agricultural College, Yangzhou University, Yangzhou 225009, China
| | - Zhi-Ming Feng
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Agricultural College, Yangzhou University, Yangzhou 225009, China
| | - Shi-Min Zuo
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Agricultural College, Yangzhou University, Yangzhou 225009, China
| | - Shou-Qiang Ouyang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
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Ouyang SQ, Park G, Ji HM, Borkovich KA. Small RNA Isolation and Library Construction for Expression Profiling of Small RNAs from Neurospora crassa and Fusarium oxysporum and Analysis of Small RNAs in Fusarium oxysporum-Infected Plant Root Tissue. Methods Mol Biol 2021; 2170:199-212. [PMID: 32797460 DOI: 10.1007/978-1-0716-0743-5_14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Due to crucial roles in gene regulation, noncoding small RNAs (sRNAs) of 20-30 nucleotides (nt) have been intensively studied in mammals and plants and are implicated in significant diseases and metabolic disorders. Elucidation of biogenesis mechanisms and functional characterization of sRNAs is often achieved using tools such as separation of small-sized RNA and deep sequencing. Although RNA interference pathways, such as quelling and meiotic silencing, have been well-described in Neurospora crassa, knowledge of sRNAs in other filamentous fungi is still limited compared to other eukaryotes. As a prerequisite for study, isolation and sequence analysis of sRNAs is necessary. We developed a protocol for isolation and library construction of sRNAs of 20-30 nt for deep sequencing in two filamentous fungi, N. crassa and Fusarium oxysporum f.sp. lycopersici. Using 200-300 μg total RNA, sRNA was isolated by size-fractionation and ligated with adapters and amplified by RT-PCR for deep sequencing. Sequence analysis of several cDNA clones showed that the cloned sRNAs were not tRNAs and rRNAs and were fungal genome-specific. In order to validate fungal miRNAs that were imported into the host cell, we developed a straightforward method to isolate protoplasts from tomato roots infected by Fusarium oxysporum f.sp. lycopersici using enzymatic digestion.
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Affiliation(s)
- Shou-Qiang Ouyang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China. .,Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China and Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou, China.
| | - Gyungsoon Park
- Department of Electrical and Biological Physics, Plasma Bioscience Research Institute, Kwangwoon University, Seoul, Republic of Korea
| | - Hui-Min Ji
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Katherine A Borkovich
- Department of Microbiology and Plant Pathology, Institute for Integrative Genome Biology, University of California, Riverside, CA, USA.
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Li B, Mao HY, Zhang ZY, Chen XJ, Ouyang SQ. FolVps9, a Guanine Nucleotide Exchange Factor for FolVps21, Is Essential for Fungal Development and Pathogenicity in Fusarium oxysporum f. sp. lycopersici. Front Microbiol 2019; 10:2658. [PMID: 31798569 PMCID: PMC6868059 DOI: 10.3389/fmicb.2019.02658] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 10/31/2019] [Indexed: 12/21/2022] Open
Abstract
The soil-borne, asexual fungus Fusarium oxysporum f.sp. lycopersici (Fol) is the causal agent of tomato wilt disease. Autophagy plays a crucial role in the development and virulence of Fol. The Fol endosomal system is highly dynamic and has been shown to be associated with conidiogenesis and pathogenicity. Rab GTPases and the regulators are highly conserved in regulating autophagy and endocytosis in most eukaryotes. Identification and characterization of additional Rab regulators in fungal pathogens should facilitate the understanding of the autophagy and endocytosis in different filamentous fungi. Here, we have identified and characterized the yeast VPS9 homolog FolVPS9 in Fol. Targeted gene deletion showed that FolVPS9 is important for growth, conidiation and virulence in Fol. Cytological examination revealed that FolVps9 co-localized with FolVps21 (a marker of early endosome) and played a critical role in endocytosis and autophagosome degradation. Pull-down assays showed that FolVps9 interacted with FolVps21, which was also important for development and plant infection in Fol. Yeast two-hybrid, bimolecular fluorescence complementation and co-immunoprecipitation assays revealed that FolVps9 specifically interacts with the GDP-bound form of FolVps21. Furthermore, a constitutively active form of FolVps21 (Q72L) was able to rescue defects of ΔFolvps9 and ΔFolvps21 mutants. In summary, our study provides solid evidence that FolVps9 acts as a FolVps21 guanine nucleotide exchange factor (GEFs) to modulate endocytosis and autophagy, thereby controlling vegetative growth, asexual development and pathogenicity in Fol.
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Affiliation(s)
- Bing Li
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Hui-Ying Mao
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Zhao-Yang Zhang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Xi-Jun Chen
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Shou-Qiang Ouyang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou, China
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Li B, Gao Y, Mao HY, Borkovich KA, Ouyang SQ. The SNARE protein FolVam7 mediates intracellular trafficking to regulate conidiogenesis and pathogenicity in Fusarium oxysporum f. sp. lycopersici. Environ Microbiol 2019; 21:2696-2706. [PMID: 30848031 PMCID: PMC6850041 DOI: 10.1111/1462-2920.14585] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 03/03/2019] [Accepted: 03/06/2019] [Indexed: 12/27/2022]
Abstract
Soluble N‐ethylmaleimide‐sensitive factor attachment protein receptors (SNAREs) are conserved in fungi, plants and animals. The Vam7 gene encodes a v‐SNARE protein that involved in vesicle trafficking in fungi. Here, we identified and characterized the function of FolVam7, a homologue of the yeast SNARE protein Vam7p in Fusarium oxysporum f. sp. lycopersici (Fol), a fungal pathogen of tomato. FolVam7 contains SNARE and PX (Phox homology) domains that are indispensable for normal localization and function of FolVam7. Targeted gene deletion showed that FolVam7‐mediated vesicle trafficking is important for vegetative growth, asexual development, conidial morphology and plant infection. Further cytological examinations revealed that FolVam7 is localized to vesicles and vacuole membranes in the hyphae stage. Moreover, the ΔFolvam7 mutant is insensitive to salt and osmotic stresses and hypersensitive to cell wall stressors. Taken together, our results suggested that FolVam7‐mediated vesicle trafficking promotes vegetative growth, conidiogenesis and pathogenicity of Fol.
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Affiliation(s)
- Bing Li
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China.,Key Laboratory for Plant-Microbe Interaction, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Ying Gao
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Hui-Ying Mao
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Katherine A Borkovich
- Department of Microbiology and Plant Pathology, Institute for Integrative Genome Biology, University of California, Riverside, CA, USA
| | - Shou-Qiang Ouyang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China.,Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou, China
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Ji HM, Zhao M, Gao Y, Cao XX, Mao HY, Zhou Y, Fan WY, Borkovich KA, Ouyang SQ, Liu P. FRG3, a Target of slmiR482e-3p, Provides Resistance against the Fungal Pathogen Fusarium oxysporum in Tomato. Front Plant Sci 2018; 9:26. [PMID: 29434609 PMCID: PMC5797444 DOI: 10.3389/fpls.2018.00026] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 01/08/2018] [Indexed: 05/20/2023]
Abstract
The vast majority of plant disease resistance (R) genes encode nucleotide binding site-leucine-rich repeat (NBS-LRR) proteins, which specifically determine the plant immune response and have been demonstrated to be targets of several microRNA (miRNA) families. The fungus Fusarium oxysporum f. sp. lycopersici (FOL) causes vascular wilt disease in tomato worldwide. Here, we explored a possible role for FGR3 in tomato defense against FOL. FRG3 is a predicted NBS-LRR like gene that is targeted by slmiR482e-3p, a member of slmiR482 miRNA family. Northern blot data demonstrated that all seven members of the slmiR482 family were regulated in diverse ways after infection by FOL. The ability of FRG3 to be regulated by slmiR482e-3p was confirmed at the transcript level by co-expression studies in Nicotiana benthamiana. A virus-induced gene silencing (VIGS) approach revealed that FRG3 confers resistance to the Motelle tomato cultivar. Taken together, our study has identified a novel R gene, FRG3, which is targeted by slmiR482e-3p at the transcript level, and is necessary for resistance to tomato wilt disease in planta.
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Affiliation(s)
- Hui-Min Ji
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Min Zhao
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Ying Gao
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Xin-Xin Cao
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Hui-Ying Mao
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Yi Zhou
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Wen-Yu Fan
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Katherine A. Borkovich
- Department of Plant Pathology and Microbiology, Institute for Integrative Genome Biology, University of California, Riverside, Riverside, CA, United States
| | - Shou-Qiang Ouyang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
- Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou, China
- *Correspondence: Shou-Qiang Ouyang, Peng Liu,
| | - Peng Liu
- Testing Center, Yangzhou University, Yangzhou, China
- *Correspondence: Shou-Qiang Ouyang, Peng Liu,
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Ouyang S, He S, Liu P, Zhang W, Zhang J, Chen S. The role of tocopherol cyclase in salt stress tolerance of rice (Oryza sativa). Sci China Life Sci 2011; 54:181-8. [DOI: 10.1007/s11427-011-4138-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2010] [Accepted: 06/28/2010] [Indexed: 01/08/2023]
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Ouyang SQ, Liu YF, Liu P, Lei G, He SJ, Ma B, Zhang WK, Zhang JS, Chen SY. Receptor-like kinase OsSIK1 improves drought and salt stress tolerance in rice (Oryza sativa) plants. Plant J 2010; 62:316-29. [PMID: 20128882 DOI: 10.1111/j.1365-313x.2010.04146.x] [Citation(s) in RCA: 196] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Receptor-like kinases (RLKs) play essential roles in plant growth, development and responses to environmental stresses. A putative RLK gene, OsSIK1, with extracellular leucine-rich repeats was cloned and characterized in rice (Oryza sativa). OsSIK1 exhibits kinase activity in the presence of Mn(2+), and the OsSIK1 kinase domain has the ability to autophosphorylate and phosphorylate myelin basic protein (MBP). OsSIK1 promoter-GUS analysis revealed that OsSIK1 is expressed mainly in the stem and spikelet in rice. The expression of OsSIK1 is mainly induced by salt, drought and H(2)O(2) treatments. Transgenic rice plants with overexpression of OsSIK1 show higher tolerance to salt and drought stresses than control plants. On the contrary, the knock-out mutants sik1-1 and sik1-2, as well as RNA interference (RNAi) plants, are sensitive to drought and salt stresses. The activities of peroxidase, superoxide dismutase and catalase are enhanced significantly in OsSIK1-overexpressing plants. Also, the accumulation of H(2)O(2) in leaves of OsSIK1-overexpressing plants is much less than that of the mutants, RNAi plants and control plants, as measured by 3,3'-diamino benzidine (DAB) staining. We also show that OsSIK1 affects stomatal density in the abaxial and adaxial leaf epidermis of rice. These results indicate that OsSIK1 plays important roles in salt and drought stress tolerance in rice, through the activation of the antioxidative system.
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Affiliation(s)
- Shou-Qiang Ouyang
- Plant Gene Research Center, National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
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Li CC, Pu XQ, Ouyang SQ. [Clinical significance and the treatment of myocardial bridge]. Hunan Yi Ke Da Xue Xue Bao 2001; 26:274-6. [PMID: 12536706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
To explore the incidence and significance of myocardial bridge in the patients undertaken coronary angiography, 861 patients were retrospectively analyzed. Fourteen myocardial bridges was detected and the prevalence rate was 1.6%. All myocardial bridges were in left anterior descending branches and among which 1 with Grade I stenosis, 4 with Grade II stenosis and 9 with Grade III stenosis. All cases had clinical symptoms and electrocardiographic changes in myocardial ischemia. Eight cases were performed test of exercise and 7 were positive and 1 was suspected positive. Three patients examined nuclide myocardial perfusion showed anterior wall myocardial ischemia of left ventricle. After having been treated by beta-blocking agents, symotoms of angina pectoris were relieved obviously and after 0.5-6 year's follow-up, no acute myocardial infarction, sudden death, and acute heart failure occured in patients with myocardial bridge. The prognosis in patients with myocardial bridge was better than those with coronary heart diseases with stable stenosis. Myocardial bridge in coronary arteries may cause myocardial ischemia and angina, and therapy of beta-blocking agents is an effective treatment.
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Affiliation(s)
- C C Li
- Department of Cardiology, Xiangya Hospital, Central South University, Changsha 410008, China
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