Induction of systemic resistance by a hypovirulent Rhizoctonia solani isolate in tomato
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- 作者：Francesca Cardinale ; Lucia Ferraris ; Danila Valentino ; Giacomo Tamietti
- 关键词：Raphanus sativus ; Solanum nigrum ; Solanum lycopersicum ; Rhizoctonia solani ; Botrytis cinerea ; Antagonism ; Biocontrol ; Hypovirulence ; Induced resistance ; ITS ; Pathogenesis-related proteins ; Chitinase ; Laminarinase ; PR1
- 刊名：Physiological and Molecular Plant Pathology
- 出版年：2006
- 出版时间：October-December 2006
- 年：2006
- 卷：69
- 期：4-6
- 页码：160-171
- 全文大小：263 K
文摘
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.