SCOOP10 and SCOOP12 peptides act through MIK2 receptor-like kinase to antagonistically regulate Arabidopsis leaf senescence

文献类型： 外文期刊

第一作者： Zhang, Zhenbiao

作者： Zhang, Zhenbiao;Li, Wei;Wang, Jie;Guo, Yongfeng;Zhang, Zhenbiao;Zhang, Zhenbiao;Gigli-Bisceglia, Nora;Testerink, Christa;Gigli-Bisceglia, Nora;Li, Saijie;Liu, Junfeng

作者机构：

关键词： leaf senescence; MIK2; SCOOP10; SCOOP12; small signaling peptides; receptor-like kinase

期刊名称：MOLECULAR PLANT （ 影响因子：24.1； 五年影响因子：25.8 ）

ISSN： 1674-2052

年卷期： 2024 年 17 卷 12 期

页码：

收录情况： SCI

摘要： Leaf senescence plays a critical role in a plant's overall reproductive success due to its involvement in nutrient remobilization and allocation. However, our current understanding of the molecular mechanisms controlling leaf senescence remains limited. In this study, we show that the receptor-like kinase MALE DISCOVERER 1-INTERACTING RECEPTOR-LIKE KINASE 2 (MIK2) functions as a negative regulator of leaf senescence. We found that the SERINE-RICH ENDOGENOUS PEPTIDE 12, previously known to physically interact with MIK2, competes with SCOOP10 to regulate MIK2-dependent leaf senescence. We observed that increased expression of SCOOP10 or the application of exogenous SCOOP10 peptides accelerated leaf senescence in a MIK2-dependent manner. Conversely, SCOOP12 acted as a suppressor of MIK2-dependent leaf senescence regulation. Biochemical assays showed that SCOOP12 enhances while SCOOP10 diminishes MIK2 phosphorylation. Thus, the SCOOP12-MIK2 module might function antagonistically on SCOOP10-MIK2 signaling at late senescing stages, allowing for fine-tuned modulation of the leaf senescence process. Our study sheds light on the complex mechanisms underlying leaf senescence and provides valuable insights into the interplay between receptors, peptides, and the regulation of plant senescence.

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