PP2C蛋白磷酸酶家族参与植物多种胁迫应答的研究进展  

Research progress of protein phosphatases type 2C family in response to various stresses in plants

作　　者：王雨璇 徐晨 李桂新[2] 丁忠杰 郑绍建[1] WANG Yuxuan;XU Chen;LI Guixin;DING Zhongjie;ZHENG Shaojian(State Key Laboratory of Plant Physiology and Biochemistry,College of Life Sciences,Zhejiang University,Hangzhou 310058,China;College of Agriculture and Biotechnology,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学生命科学学院,植物生理与生物化学国家重点实验室 [2]浙江大学农业与生物技术学院

出　　处：《植物生理学报》2023年第8期1463-1473,共11页Plant Physiology Journal

基　　金：国家重点研发计划项目(2022YFA1303400);中央高校基本科研业务费。

摘　　要：植物在生长发育的过程中要面对一系列非生物和生物胁迫的侵害,为了应对这些胁迫,植物进化出了复杂的调控机制。蛋白质的翻译后修饰是其中一种重要的调节方式,包括蛋白激酶介导的磷酸化和蛋白磷酸酶介导的去磷酸化。PP2Cs(protein phosphatases type 2C)是植物中最大的蛋白磷酸酶家族,可以在多个信号级联反应中发挥作用,在干旱和盐碱胁迫中,PP2Cs通过依赖和不依赖ABA两种方式发挥负调控作用;在低温胁迫中,PP2Cs促进OST1的活性赋予植物低温耐受性;在营养胁迫中,PP2C参与调控氮元素和钾元素的吸收。此外,PP2Cs也参与了植物对虫害和病原菌的调控。探究PP2Cs调控不同胁迫的分子机制,对提高植物的抗逆性和作物产量具有重要意义。Plants face a series of abiotic and biotic stresses during growth and development.In order to cope with these stresses,plants have evolved complex regulatory mechanisms.Post-translational modification of proteins is one of the most important regulatory strategies,including protein kinase-mediated phosphorylation and protein phosphatase-mediated dephosphorylation.Protein phosphatases type 2C(PP2Cs)is the largest family of protein phosphatases in plants.PP2Cs play a negative regulatory role in drought and saline-alkali stress through ABA-dependent and ABA-independent manners.Under low temperature stress,PP2Cs promote the activity of OST1 to endow plants with low temperature tolerance.PP2Cs are involved in the regulation of nitrogen(N)and potassium(K)uptake during nutrient deficiency stress.In addition,PP2Cs are also involved in plant resistance of pests and pathogens.It is important to explore the molecular mechanism of PP2Cs in regulation of stress responses for improving plant stress tolerance and crop yield.

关 键 词：PP2C 蛋白磷酸酶 胁迫 去磷酸化 分子机制 

分 类 号：Q945.78[生物学—植物学]