Enhanced Valsa canker resistance conferred by expression of MdLecRK-S.4.3 in Pyrus betulifolia is largely suppressed by PbePUB36
文献类型： 外文期刊
第一作者： Sun, E.
作者： Sun, E.;Yu, Hongqiang;Cai, Minrui;Mao, Xia;Li, Yanyan;Zuo, Cunwu;Chen, Zhongjian;Zuo, Cunwu
作者机构：
关键词： Apple; co-expression analysis; gene duplication; L-type lectin receptor-like kinases; Malus domestica; pattern recognition receptors; pear; Pyrus betulifolia; reciprocal confrontation role; Valsa canker
期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：6.9； 五年影响因子：8.0 ）
ISSN： 0022-0957
年卷期： 2023 年 74 卷 14 期
页码：
收录情况： SCI
摘要： MdLecRK-S.4.3-induced resistance to Valsa canker in pear is compromised by PbePUB36, and MdLecRK-S.4.3 interacts with PbePUB36 and/or MdBAK1 to mediate immune responses. L-type lectin receptor-like kinases (L-LecRKs) act as sensors of extracellular signals and as initiators for plant immune responses; however, the function of LecRK-S.4 in plant immunity has not yet been extensively investigated. In the present study we found that MdLecRK-S.4.3 in apple (Malus domestica), a homologous gene of LecRK-S.4, was differentially expressed during infection by Valsa mali and Valsa pyri. Overexpression of MdLecRK-S.4.3 facilitated the induction of immune responses and enhanced the resistance to Valsa canker of fruits of apple and pear (Pyrus betulifolia), and of suspension cells of pear 'Duli-G03'. The expression of PbePUB36, a RLCK XI sub-family member, was significantly repressed in the MdLecRK-S.4.3-overexpressing cell lines. Overexpression of PbePUB36 interfered with the resistance to Valsa canker and the immune response caused by up-regulation of MdLecRK-S.4.3. In addition, we found that MdLecRK-S.4.3 interacted with BAK1 and/or PbePUB36 in vivo. Thus, whilst MdLecRK-S.4.3 activated various immune responses and positively regulated Valsa canker resistance, this could be largely compromised by PbePUB36. MdLecRK-S.4.3 interacted with PbePUB36 and/or MdBAK1 to mediate the immune responses. Our finding provides a basis for further examination of the molecular mechanisms underlying resistance to Valsa canker, and can contribute to resistance breeding.
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