New players in ABA signaling: identification of PUB12/13 involved in degradation of ABA co-receptor ABI1

作     者：MA Xuan MO Bei Xin CAO Xiao Feng 

作者机构：Shenzhen Key Laboratory of Microbial Genetic Engineering College of Life Sciences Shenzhen University Institute of Genetics and Developmental Biology Chinese Academy of Sciences 

出 版 物：《Science China(Life Sciences)》 (中国科学（生命科学英文版）)

年 卷 期：2015年第58卷第11期

页      面：1173-1174页

核心收录：

学科分类：0710[理学-生物学] 071001[理学-植物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 

主　　题：早期鉴定 ABA 信号 蛋白磷酸酶 球员 降解 受体 植物激素 

摘      要：Abscisic acid （ABA） was originally identified in the early 1960s, and was thought to be involved in fruit and leaf ab- scission. Over the past 50 years, ABA was intensely studied and has become one of the vital plant hormones implicated in seed dormancy, seed germination, stomatal regulation, flowering, senescence and environmental stress responses. Early work isolated the mutants abil （ABA-insensitive 1） and abi2, which are insensitive to ABA [1]. These two genes were subsequently revealed to encode members of the clade A protein phosphatase 2Cs （PP2Cs） of serine/threonine pro- tein phosphatases （see review [2]）. Additional members of the clade A PP2Cs such as ABA-hypersensitive germinationl （AHG1） and AHG3, were also shown to participate in ABA stress signaling [2]. These PP2Cs function as negative regu- lators of ABA response.