Sporophytic control of tapetal development and pollen fertility by a mitogen-activated protein kinase cascade in rice

作     者：Jianguo Zeng Manman Duan Yiqing Wang Guangtao Li Yujing You Jie Shi Changhao Liu Jinyang Zhang Juan Xu Shuqun Zhang Jing Zhao 

作者机构：Department of Plant PathologyNanjing Agricultural UniversityNanjing 210095China State Key Laboratory of Plant Physiology and BiochemistryCollege of Life SciencesZhejiang UniversityHangzhou 310058China Division of BiochemistryUniversity of MissouriColumbia65211MOUSA 

出 版 物：《Journal of Integrative Plant Biology》 (植物学报（英文版）)

年 卷 期：2024年第66卷第7期

页      面：1500-1516页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：supported by grants from the National Natural Science Foundation of China(Young Scientist Fund,YSF)(32100288) Natural Science Foundation for Youths of Jiangsu Province(BK20200558) Fundamental Research Funds for the Central Universities(ZJ22195005) 

主　　题：degradation MAPK cascade pollen fertility rice tapetum 

摘      要：Tapetum,the innermost layer of the anther wall,provides essential nutrients and materials for pollen *** degradation of anther tapetal cells is a prerequisite for normal pollen development in flowering *** cells facilitate male gametogenesis by providing cellular contents after highly coordinated programmed cell death(PCD).Tapetal development is regulated by a transcriptional ***,the signaling pathway(s)involved in this process are poorly *** this study,we report that a mitogen-activated protein kinase(MAPK)cascade composed of OsYDA1/OsYDA2-OsMKK4-OsMPK6 plays an important role in tapetal development and male gametophyte *** of function of this MAPK cascade leads to anther indehiscence,enlarged tapetum,and aborted pollen *** cells in osmkk4 and osmpk6 mutants exhibit an increased presence of lipid body-like structures within the cytoplasm,which is accompanied by a delayed occurrence of *** of a constitutively active version of OsMPK6(CA-OsMPK6)can rescue the pollen defects in osmkk4 mutants,confirming that OsMPK6 functions downstream of OsMKK4 in this *** crosses also demonstrated that the MAPK cascade sporophyticly regulates pollen *** study reveals a novel function of rice MAPK cascade in plant male reproductive biology.