数字农科院2.0

Cellobiose elicits immunity in lettuce conferring resistance to Botrytis cinerea

文献类型： 外文期刊

作者： He, Jiuxing;Kong, Meng;Qian, Yuanchao;Gong, Min;Lv, Guohua;Song, Jiqing

作者机构：

关键词： Botrytis cinerea;cellobiose;beta-1,3-glucanase;immune response;lettuce;transcriptome

期刊名称： JOURNAL OF EXPERIMENTAL BOTANY

ISSN： 0022-0957

年卷期： 2022 年

页码：

收录情况： SCIE（2023版）

摘要： Cellobiose is the primary product of cellulose hydrolysis and is expected to function as a type of pathogen/damageassociated molecular pattern in evoking plant innate immunity. In this study, cellobiose was demonstrated to be a positive regulator in the immune response of lettuce, but halted autoimmunity when lettuce was exposed to concentrations of cellobiose >60 mg l(-1). When lettuce plants were infected by Botrytis cinerea, cellobiose endowed plants with enhanced pre-invasion resistance by activating high beta-1,3-glucanase and antioxidative enzyme activities at the initial stage of pathogen infection. Cellobiose-activated core regulatory factors such as EDS1, PTI6, and WRKY70, as well as salicylic acid signaling, played an indispensable role in modulating plant growth-defense trade-offs. Transcriptomics data further suggested that the cellobiose-activated plant-pathogen pathways are involved in microbe/pathogenassociated molecular pattern-triggered immune responses. Genes encoding receptor-like kinases, transcription factors, and redox homeostasis, phytohormone signal transduction, and pathogenesis-related proteins were also up- or down-regulated by cellobiose. Taken together, the findings of this study demonstrated that cellobiose serves as an elicitor to directly activate disease-resistance-related cellular functions. In addition, multiple genes have been identified as potential modulators of the cellobiose-induced immune response, which could aid understanding of underlying molecular events.

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