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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] [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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Lin YH, Shen SM, Wen CJ, Lin YJ, Chang TD, Chu SC. Molecular Detection Assays for Rapid Field-Detection of Rice Sheath Blight. FRONTIERS IN PLANT SCIENCE 2021; 11:552916. [PMID: 33505407 PMCID: PMC7829186 DOI: 10.3389/fpls.2020.552916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 12/03/2020] [Indexed: 06/12/2023]
Abstract
Rhizoctonia solani (Rs), a soil-borne fungal pathogen, can result in rice sheath blight (ShB), which causes yield loss. To prevent outbreaks of ShB and enhance the sustainability of rice production, it is critical to develop a rapid ShB detection method for specific, fast, and on-site disease management. In this study, a reagent for the rapid extraction of this pathogen was developed for on-site detection. The specificity and sensitivity of a novel SMS RS1-F/SMS RS1-R primer set and a ITS1/GMRS-3 reference primer set were tested, while four different extraction protocols for ShB were developed. Moreover, intraday and interday assays were performed to evaluate the reproducibility of the detection methods developed. The results indicated that all of the developed protocols are suitable for use in detecting ShB. In addition, all the samples of infected rice yielded positive Rs detection results when subjected to TaqMan probe-based real-time PCR and SYBR green-based real-time PCR (SMS RS1-F/SMS RS1-R) tests in which automatic magnetic bead-based DNA extraction was performed. These results indicated that the two molecular detection protocols were suitable for the field diagnosis of ShB for all asymptomatic and symptomatic rice samples.
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Affiliation(s)
- Ying-Hong Lin
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Plant Medicine Teaching Hospital, General Research Service Center, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Shih-Mao Shen
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Chen-Jie Wen
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Yi-Jia Lin
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Tsai-De Chang
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Sheng-Chi Chu
- Biological Control Branch Station, Miaoli District Agricultural Research and Extension Station, Council of Agriculture, Miaoli, Taiwan
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Divya K, Thampi M, Vijayan S, Varghese S, Jisha M. Induction of defence response in Oryza sativa L. against Rhizoctonia solani (Kuhn) by chitosan nanoparticles. Microb Pathog 2020; 149:104525. [DOI: 10.1016/j.micpath.2020.104525] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 09/15/2020] [Accepted: 09/21/2020] [Indexed: 11/29/2022]
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Tiwari M, Srivastava S, Singh PC, Mishra AK, Chakrabarty D. Functional characterization of tau class glutathione- S-transferase in rice to provide tolerance against sheath blight disease. 3 Biotech 2020; 10:84. [PMID: 32089979 PMCID: PMC6997320 DOI: 10.1007/s13205-020-2071-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 01/16/2020] [Indexed: 10/25/2022] Open
Abstract
Glutathione-S-transferase (GST) is an important defense gene that confers resistance against several abiotic and biotic stresses. The present study identifies a tau class GST in rice (Oryza sativa L.), OsGSTU5 (Os09g20220), which provided tolerance against sheath blight (SB) disease, caused by a necrotrophic fungus, Rhizoctonia solani (RS). Overexpression and knockdown rice transgenic lines of OsGSTU5 were generated and tested for the severity of infection during sheath blight disease. The results obtained after RS infection showed that the lesion cover area and hyphal penetration were more in knockdown line and lesser in the overexpression line. Analysis of reactive oxygen species (ROS) accumulation showed more spots of H2O2 and O2- in knockdown lines compared to overexpressed lines. Later, RS transcript level was analyzed in RS-infected transgenic lines, which manifested that the knockdown line had higher RS transcripts in comparison to the control line and least RS transcripts were observed in the overexpressed line. In conclusion, rice transgenic lines overexpressing OsGSTU5 were found to be more tolerant, while the knockdown lines were more prone to Rhizoctonia infection compared to control lines.
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Affiliation(s)
- Madhu Tiwari
- CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh India
- Banaras Hindu University, Varanasi, Uttar Pradesh India
| | - Suchi Srivastava
- CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh India
- Academy of Scientific and Innovative Research, Gaziabad, India
| | - Poonam C. Singh
- CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh India
- Academy of Scientific and Innovative Research, Gaziabad, India
| | | | - Debasis Chakrabarty
- CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh India
- Academy of Scientific and Innovative Research, Gaziabad, India
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Hong Y, Yang Y, Zhang H, Huang L, Li D, Song F. Overexpression of MoSM1, encoding for an immunity-inducing protein from Magnaporthe oryzae, in rice confers broad-spectrum resistance against fungal and bacterial diseases. Sci Rep 2017; 7:41037. [PMID: 28106116 PMCID: PMC5247740 DOI: 10.1038/srep41037] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 12/15/2016] [Indexed: 12/27/2022] Open
Abstract
Potential of MoSM1, encoding for a cerato-platanin protein from Magnaporthe oryzae, in improvement of rice disease resistance was examined. Transient expression of MoSM1 in rice leaves initiated hypersensitive response and upregulated expression of defense genes. When transiently expressed in tobacco leaves, MoSM1 targeted to plasma membrane. The MoSM1-overexpressing (MoSM1-OE) transgenic rice lines showed an improved resistance, as revealed by the reduced disease severity and decreased in planta pathogen growth, against 2 strains belonging to two different races of M. oryzae, causing blast disease, and against 2 strains of Xanthomonas oryzae pv. oryzae, causing bacterial leaf blight disease. However, no alteration in resistance to sheath blight disease was observed in MoSM1-OE lines. The MoSM1-OE plants contained elevated levels of salicylic acid (SA) and jasmonic acid (JA) and constitutively activated the expression of SA and JA signaling-related regulatory and defense genes. Furthermore, the MoSM1-OE plants had no effect on drought and salt stress tolerance and on grain yield. We conclude that MoSM1 confers a broad-spectrum resistance against different pathogens through modulating SA- and JA-mediated signaling pathways without any penalty on abiotic stress tolerance and grain yield, providing a promising potential for application of MoSM1 in improvement of disease resistance in crops.
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Affiliation(s)
- Yongbo Hong
- National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Yayun Yang
- National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Huijuan Zhang
- National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Lei Huang
- National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Dayong Li
- National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
| | - Fengming Song
- National Key Laboratory for Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P. R. China
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Luo C, Zhou H, Zou J, Wang X, Zhang R, Xiang Y, Chen Z. Bacillomycin L and surfactin contribute synergistically to the phenotypic features of Bacillus subtilis 916 and the biocontrol of rice sheath blight induced by Rhizoctonia solani. Appl Microbiol Biotechnol 2014; 99:1897-910. [PMID: 25398282 DOI: 10.1007/s00253-014-6195-4] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2014] [Revised: 10/22/2014] [Accepted: 10/23/2014] [Indexed: 12/27/2022]
Abstract
The antagonistic activity of lipopeptides in Bacillus subtilis 916 has been well documented, yet relatively little is known about their mechanism in biofilm formation and environmental colonization. This study sought to examine the interaction of B. subtilis 916 on Rhizoctonia solani-infected rice sheath to elucidate the mechanism of colonization on plant leaves. Results showed that the mutants Δbac, Δsrf, and Δsrf + bac of B. subtilis 916, deficient in bacillomycin L and surfactin production, respectively, not only altered colony morphology but also changed swarming motility, reduced antagonistic activity, and decreased biofilm formation. In particular, biofilm formation in mutant Δbac, not Δsrf or Δsrf + bac, were restored with addition of surfactin and bacillomycin L at 10 and 50 μg/mL, respectively. Moreover, surfactin and bacillomycin L were able to restore or enhance swarming motility in the corresponding mutants at 10 μg/mL, respectively. With the aid of green fluorescent protein tagging, it was demonstrated that B. subtilis 916 formed a robust biofilm on the rice sheath blight lesion and colonized well on R. solani-infected rice sheath, while its corresponding mutants performed poorly. These observations also correlated with the rice cultivar pot experiments, in which B. subtilis 916 exhibited greater biocontrol than its mutants. Our results suggest that surfactin and bacillomycin L contribute differently but synergistically to the biocontrol of rice sheath blight in B. subtilis 916 through its antifungal activity, biofilm formation, and colonization.
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Affiliation(s)
- Chuping Luo
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, 210014, China,
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Hwang IS, Kang WR, Hwang DJ, Bae SC, Yun SH, Ahn IP. Evaluation of bakanae disease progression caused by Fusarium fujikuroi in Oryza sativa L. J Microbiol 2013; 51:858-65. [PMID: 24385365 DOI: 10.1007/s12275-013-3472-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 10/07/2013] [Indexed: 11/28/2022]
Abstract
Bakanae disease caused by Fusarium fujikuroi is an important fungal disease in rice. Among the seven strains isolated from symptomatic rice grains in this study, one strain, FfB14, triggered severe root growth inhibition and decay in the crown and root of rice seedlings. The remaining six strains caused typical Bakanae symptoms such as etiolation and abnormal succulent rice growth. To reveal the relationship between mycelial growth in the infected tissues and Bakanae disease progression, we have established a reliable quantification method using real time PCR that employs a primer pair and dual-labeled probe specific to a unigene encoding F. fujikuroi PNG1 (FfPNG1), which is located upstream of the fumonisin biosynthesis gene cluster. Plotting the crossing point (CP) values from the infected tissue DNAs on a standard curve revealed the active fungal growth of FfB14 in the root and crown of rice seedlings, while the growth rate of FfB20 in rice was more than 4 times lower than FfB14. Massive infective mycelial growth of FfB14 was evident in rice stems and crown; however, FfB20 did not exhibit vigorous growth. Our quantitative evaluation system is applicable for the identification of fungal virulence factors other than gibberellin.
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Affiliation(s)
- In Sun Hwang
- Rural Development Administration, Suwon, 441-707, Republic of Korea
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