RopGAP4-dependent Rop GTPase rheostat control of Arabidopsis oxygen deprivation tolerance

被引：275

作者：

Baxter-Burrell, A ^{[1
]}

Yang, ZB ^{[1
]}

Springer, PS ^{[1
]}

Bailey-Serres, J ^{[1
]}

机构：

[1] Univ Calif Riverside, Ctr Plant Cell Biol, Dept Bot & Plant Sci, Riverside, CA 92521 USA

来源：

SCIENCE | 2002年 / 296卷 / 5575期

关键词：

D O I：

10.1126/science.1071505

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Transient soil flooding limits cellular oxygen to roots and reduces crop yield. Plant response to oxygen deprivation involves increased expression of the alcohol dehydrogenase gene (ADH) and ethanolic fermentation. Disruption of the Arabidopsis gene that encodes Rop (RHO-like small G protein of plants) guanosine triphosphatase (GTPase) activating protein 4 (ROPGAP4), a Rop deactivator, elevates ADH expression in response to oxygen deprivation but decreases tolerance to stress. Rop-dependent production of hydrogen peroxide via a diphenylene iodonium chloride-sensitive calcium-dependent reduced nicotinamide adenine dinucleotide phosphate (NADPH) oxidase is necessary for induction of both ADH and RopGAP4 expression. Tolerance to oxygen deprivation requires Rop activation and RopGAP4-dependent negative feedback regulation. This Rop signal transduction rheostat balances the ability to increase ethanolic fermentation with survival.

引用

页码：2026 / 2028

页数：3

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