Induction of systemic resistance by a hypovirulent Rhizoctonia solani isolate in tomato |
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| Affiliation: | 1. School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, Punjab, India;2. ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India;3. Department of Agronomy, School of Agriculture, Lovely Professional University, Phagwara, Punjab, India;1. State Key Laboratory Base of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China;2. Key Laboratory of Rubber&Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber and plastics, Qingdao University of Science and Technology, Qingdao 266042, PR China;3. College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China;1. Department of Basic Sciences and Technology, Community College, Taibah University, Saudi Arabia;2. Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt |
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| Abstract: | A polynucleate Rhizoctonia isolate (R3) was analysed for virulence, growth characteristics, enzyme production and presence of dsRNAs. Taxonomic position was assessed morphologically and by anastomosis group (AG) testing and ITS sequence analysis. Results indicated that R3 is a hypovirulent R. solani AG 4. Mechanisms underlying biocontrol towards virulent R. solani and Botrytis cinerea were investigated and plant-mediated resistance was followed using biochemical markers of defence (PR1, laminarinase, chitinase). Control apparently relies on spatial and nutrient competition in soil, and on systemic induced resistance. This is the first report on induction of systemic resistance and of defence markers by a hypovirulent strain of R. solani. |
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