Tomato LysM receptor kinase 4 mediates chitin-elicited fungal resistance in both leaves and fruit
文献类型： 外文期刊
作者： Ai, Yingfei 1 ; Li, Qinghong 1 ; Li, Chenying 1 ; Wang, Ran 1 ; Sun, Xun 1 ; Chen, Songyu 1 ; Cai, Xin-Zhong 2 ; Qi, Xingjiang 3 ; Liang, Yan 1 ;
作者机构： 1.Zhejiang Univ, Dept Plant Protect, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310058, Peoples R China
2.Zhejiang Univ, Hainan Inst, Sanya 572025, Peoples R China
3.Zhejiang Acad Agr Sci, Inst Hort, Zhejiang Xianghu Lab, Hangzhou 310021, Peoples R China
期刊名称：HORTICULTURE RESEARCH （ 影响因子：8.7； 五年影响因子：9.0 ）
ISSN： 2662-6810
年卷期： 2023 年 10 卷 6 期
页码：
收录情况： SCI
摘要： Fungal infection is a major cause of crop and fruit losses. Recognition of chitin, a component of fungal cell walls, endows plants with enhanced fungal resistance. Here, we found that mutation of tomato LysM receptor kinase 4 (SlLYK4) and chitin elicitor receptor kinase 1 (SlCERK1) impaired chitin-induced immune responses in tomato leaves. Compared with the wild type, sllyk4 and slcerk1 mutant leaves were more susceptible to Botrytis cinerea (gray mold). SlLYK4 extracellular domain showed strong binding affinity to chitin, and the binding of SlLYK4 induced SlLYK4-SlCERK1 association. Remarkably, qRT-PCR analysis indicated that SlLYK4 was highly expressed in tomato fruit, and beta-GLUCURONIDASE (GUS) expression driven by the SlLYK4 promoter was observed in tomato fruit. Furthermore, SlLYK4 overexpression enhanced disease resistance not only in leaves but also in fruit. Our study suggests that chitin-mediated immunity plays a role in fruit, providing a possible way to reduce fungal infection-related fruit losses by enhancing the chitin-induced immune responses.
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