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植物OST1基因功能研究进展

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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 plant stress tolerance. 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

参考文献:

[8] ZHENG Z, XU X, CROSLEY R A, et al. The protein kinase SnRK2.6 mediates the regulation of sucrose metabolism and plant growth in Arabidopsis[J]. Plant Physiol, 2010,153(1):99-113.

[20] PARK S Y, FUNG P, NISHIMURA N, et al. Abscisic acid inhibits type 2C protein phosphatases via the PYR/PYL family of START proteins[J]. Science, 2009,324(5930):1068-1071.

[22] FUJII H, CHINNUSAMY V, RODRIGUES A, et al. In vitro reconstitution of an abscisic acid signalling pathway[J]. Nature, 2009,462(7273):660-664.

[24] CUTLER S R, RODRIGUEZ P L,FINKELSTEIN R R,et al. Abscisic acid: Emergence of a core signaling network[J]. Annu Rev Plant Biol, 2010,61:651-679.

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