植物OST1基因功能研究进展
摘要:植物在生长过程中会遭受各种逆境胁迫,环境胁迫会引起植物体内一系列的信号反应,其中脱落酸(ABA)信号途径是一条重要的胁迫应答途径。作为ABA信号通路中的蛋白质激酶之一,气孔开放因子1(Stomatal opening factor 1,OST1)在植物逆境应答反应中扮演重要角色。因此,研究OST1基因在植物逆境应答中的功能有助于阐述植物耐逆分子机制。从OST1的相互作用因子及其在信号通❅路中的调控作用等方面进行阐述,对其介导的逆境应答机制进行了系统总结。
关键词:植物;逆境胁迫;OST1基因功能;信号转导
Advances in Function of OST1 Gene in Plants
CHEN Ni-ni, SHEN Xiao-yan, WANG Zeng-lan
(Shandong Key Lab of Plant Stress Research/College of Life Sciences,Shandong Normal University, Jinan 250014, China)
Abstract: Plants are subjected to all kinds of stresses in the process of growth. Environmental stresses can make plants to produce a series of signal transduction. Signal pathway of abscisic acid (ABA) is an important stress response pathway. Stomatal opening factor 1 (OST1), one of protein kinases in ABA signaling pathway, plays a pivotal role in plant. Studying the function of OST1 gene in plants will help to elaborate the molecular mechanisms of pl⌚ant stress toleraษnce. Interacting factors of OST1 and its regulatory roles in the signal pathway were reviewed. The mechanisms of OST1 in stress response of plants were summarized.
Key words: plant;adversity stress;OST1 gene function;signal transduction
1 OST1在胁迫响应中的调控机制
1.1 ABA依赖的调控途径
ABA作为高等植物中普遍存在的一种植物激素能调控多种生理相关反应,比如开花时间、果实成熟以及对逆境胁迫如✞干旱、盐碱等的反应[10-14]。其中,OST1作为ABA信号途径的重要组分,参与ABA调控的逆境胁迫信号途径。
1.1.3 OST1对转录因子的调控 OST1在逆境应答过程中,除了对膜蛋白的调控外,还有其他调节途径,如对转录因子b-ZIP及SNAC1等的调控。
2 OST1在植物生长发育中的作用
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