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

作　　者：Zhenbiao Zhang Nora Gigli-Bisceglia Wei Li Saijie Li Jie Wang Junfeng Liu Christa Testerink Yongfeng Guo 

机构地区：[1]Tobacco Research Institute,Chinese Academy of Agricultural Sciences,Qingdao,China [2]Graduate School of Chinese Academy of Agricultural Sciences,Beijing,China [3]Laboratory of Plant Physiology,Wageningen University&Research,Wageningen,the Netherlands [4]Plant Stress Resilience,Institute of Environmental Biology,Utrecht University,Utrecht,the Netherlands [5]State Key Laboratory of Maize Bio-breeding,Ministry of Agriculture Key Laboratory for Crop Pest Monitoring and Green Control,Joint International Research Laboratory of Crop Molecular Breeding,China Agricultural University,Beijing,China

出　　处：《Molecular Plant》2024年第12期1805-1819,共15页分子植物（英文版）

基　　金：Agricultural Science and Technology Innovation Program,Chinese Academy of Agricultural Sciences(ASTIP-TRIO2 to Y.G.);National Natural Science Foundation of China(32270332 to Y.G.,32370337 to J.W.and 31970204 to W.L.);European Research Council(ERC)under the EU Horizon 2020 Research and Innovation Programme(grant agreement 724321 to C.T.).

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.

关 键 词：leaf senescence MIK2 SCOOP10 SCOOP12 small signaling peptides receptor-like kinase 

分 类 号：Q94[生物学—植物学]