Identification of Arabidopsis accession with resistance to Botrytis cinerea by natural variation analysis, and characterization of the resistance response

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  • Narusaka Mari
    Research Institute for Biological Sciences
  • Yao Nan
    State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University
  • Iuchi Atsuko
    Experimental Plant Division, RIKEN Bio Resource Center
  • Iuchi Satoshi
    Experimental Plant Division, RIKEN Bio Resource Center
  • Shiraishi Tomonori
    Laboratory of Plant Pathology and Genetic Engineering, Faculty of Agriculture, Okayama University
  • Narusaka Yoshihiro
    Research Institute for Biological Sciences

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  • Identification of <i>Arabidopsis</i> accession with resistance to <i>Botrytis cinerea</i> by natural variation analysis, and characterization of the resistance response

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説明

Botrytis cinerea is a ubiquitous necrotrophic fungal pathogen that infects over 200 different plant species. We have analyzed 17 Arabidopsis ecotypes for natural variations in their susceptibility to B. cinerea, and found compatible and incompatible Arabidopsis–Botrytis interactions. We determined that Arabidopsis ecotype Ler is resistant to 5 B. cinerea isolates used in this study. To further investigate the roles of the salicylic acid (SA)-dependent defense response pathways against B. cinerea, we inoculated various Arabidopsis mutants with the pathogen. Arabidopsis Ler plants expressing the nahG gene inoculated with B. cinerea showed as much resistance as the parental plants (Ler-wild type). The sgt1b-1 and rar1-10 mutants also showed resistance to the pathogen. In this study, we discuss the natural variations in the symptoms observed among various ecotypes upon inoculation with B. cinerea. In addition, SA plays only a minor role in preventing systemic infection with B. cinerea.

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