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- W4386860517 abstract "Abstract Pear ring rot, caused by the pathogenic fungi Botryosphaeria dothidea, seriously affects pear production. While the infection-induced ROS burst of infected plants limits the proliferation of B. dothidea during the early infection stage, high ROS levels can also contribute to their growth during the later necrotrophic infection stage. Therefore, it is important to understand how plants balance ROS levels and resistance to pathogenic B. dothidea during the later stage. In this study, we identified PbrChiA, a GH18 chitinase-encoding gene with high infection-induced expression, through a comparative transcriptome analysis. Artificial substitution, stable overexpression, and VIGS experiments demonstrated that PbrChiA can positively regulate pear resistance as a secreted chitinase to break down B. dothidea mycelium in vitro and that overexpression of PbrChiA suppressed infection-induced ROS accumulation. Further analysis revealed that PbrChiA can bind to the ectodomain of PbrLYK1b2, and this interaction suppressed PbrLYK1b2-mediated chitin-induced ROS accumulation. Collectively, we propose that the combination of higher antifungal activity from abundant PbrChiA and lower ROS levels during later necrotrophic infection stage confer resistance of pear against B. dothidea." @default.
- W4386860517 created "2023-09-20" @default.
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- W4386860517 date "2023-09-15" @default.
- W4386860517 modified "2023-09-27" @default.
- W4386860517 title "PbrChiA: a key chitinase of pear in response to <i>Botryosphaeria dothidea</i> infection by interacting with PbrLYK1b2 and down-regulating ROS accumulation" @default.
- W4386860517 doi "https://doi.org/10.1093/hr/uhad188" @default.
- W4386860517 hasPublicationYear "2023" @default.
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