A signaling cascade mediating fruit trait development via phosphorylation-modulated nuclear accumulation of JAZ repressor

文献类型： 外文期刊

第一作者： Wang, Wei

作者： Wang, Wei;Ouyang, Jinyao;Li, Yating;Zhai, Changsheng;He, Bing;Si, Huahan;Jia, Wensuo;Chen, Kunsong;Rose, Jocelyn K. C.;Jia, Wensuo

作者机构：

关键词： defense response; JAZ repressor; phosphorylation; strawberry; subcellular translocation

期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：11.4； 五年影响因子：10.1 ）

ISSN： 1672-9072

年卷期： 2024 年

页码：

收录情况： SCI

摘要： It is generally accepted that jasmonate-ZIM domain (JAZ) repressors act to mediate jasmonate (JA) signaling via CORONATINE-INSENSITIVE1 (COI1)-mediated degradation. Here, we report a cryptic signaling cascade where a JAZ repressor, FvJAZ12, mediates multiple signaling inputs via phosphorylation-modulated subcellular translocation rather than the COI1-mediated degradation mechanism in strawberry (Fragaria vesca). FvJAZ12 acts to regulate flavor metabolism and defense response, and was found to be the target of FvMPK6, a mitogen-activated protein kinase that is capable of responding to multiple signal stimuli. FvMPK6 phosphorylates FvJAZ12 at the amino acid residues S179 and T183 adjacent to the PY residues, thereby attenuating its nuclear accumulation and relieving its repression for FvMYC2, which acts to control the expression of lipoxygenase 3 (FvLOX3), an important gene involved in JA biosynthesis and a diverse array of cellular metabolisms. Our data reveal a previously unreported mechanism for JA signaling and decipher a signaling cascade that links multiple signaling inputs with fruit trait development.

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