Host Alternative NADH:Ubiquinone Oxidoreductase Serves as a Susceptibility Factor to Promote Pathogenesis of Rhizoctonia solani in Plants

Phytopathogens have evolved mechanisms to utilize host genes (commonly known as susceptibility factors) to promote their pathogenesis. is a highly destructive fungal pathogen of various plants, including rice. We previously reported rice genes that were differentially regulated during pathogenesis....

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Bibliographic Details
Published in:Phytopathology 2019-10, Vol.109 (10), p.PHYTO02190055R-1750
Main Authors: Kant, Ravi, Tyagi, Kriti, Ghosh, Srayan, Jha, Gopaljee
Format: Article
Language:English
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Summary:Phytopathogens have evolved mechanisms to utilize host genes (commonly known as susceptibility factors) to promote their pathogenesis. is a highly destructive fungal pathogen of various plants, including rice. We previously reported rice genes that were differentially regulated during pathogenesis. In this study, we analyzed the role of tomato homologs of two rice genes, isoflavone reductase ( ) and alternative NADH:ubiquinone oxidoreductase ( ), as potential susceptibility factors for . Virus-induced gene silencing of in tomato resulted in compromised susceptibility against , whereas -silenced plants demonstrated susceptibility similar to that of control plants. silencing in tomato led to homogenous accumulation of reactive oxygen species (optimum range) upon infection. In addition, the expression and enzyme activity of some host defense and antioxidant genes was enhanced, whereas H O content, lipid peroxidation, and electrolyte leakage were reduced in -silenced plants. Similarly, transient silencing of provided tolerance against infection in rice. Overall, the data presented in this study suggest that serves as a host susceptibility factor to promote pathogenesis.
ISSN:0031-949X
1943-7684
DOI:10.1094/PHYTO-02-19-0055-R