Stigma Receptivity Is Controlled by Functionally Redundant MAPK Pathway Components in Arabidopsis
作者机构：University of CalgaryBI 392Department of Biological Sciences2500 University Dr.NWCalgaryAB T2N 1N4Canada Senior ScientistFrontier Agri-Science Inc98 Ontario StreetPort HopeON L1A2V2Canada Department of Botany and Plant PathologyPurdue UniversityWest LafayetteIN 47907USA
出 版 物：《Molecular Plant》 (分子植物（英文版）)
年 卷 期：2020年第13卷第11期
页 面：1582-1593页
核心收录：
学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学]
基 金：Natural Sciences and Engineering Research Council of Canada funding for M.A.S
主 题：reproduction pollination stigma receptivity compatibility MAPK redundancy Exo70A1 exocytosis phosphorylation
摘 要：In angiosperms,the process of pollination relies on species-specific interaction and signaling between the male(pollen)and female(pistil)counterparts where the interplay between several pollen and stigma proteins decides the fate of the *** Brassicaceae,the dry stigmatic papillary cells control pollen germination by releasing resources only to compatible pollen thereby allowing pollen to hydrate and *** the identification of a number of stigmatic proteins that facilitate pollination responses,the signaling mechanisms that regulate functions of these proteins have remained ***,we show that,in Arabidopsis,an extremely functionally redundant mitogen-activated protein kinase(MAPK)cascade is required for maintaining stigma receptivity to accept compatible *** genetic analyses demonstrate that in stigmas,five MAPK kinases(MKKs),MKK1/2/3/7/9 are required to transmit upstream signals to two MPKs,MPK3/4,to mediate compatible *** functions of these five MKKs in the quintuple mutant(mkk1/2/3RNAi/mkk7/9)phenocopied pollination defects observed in the m pk4RNAi/m pk3 double *** further show that this MAPK nexus converges on Exo70A1,a previously identified stigma receptivity factor essential for *** that pollination is the crucial initial step during plant reproduction,understanding the mechanisms that govern successful pollination could lead to development of strategies to improve crop yield.
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