Role of farnesyltransferase in ABA regulation of guard cell anion channels and plant water loss

被引：307

作者：

Pei, ZM

Ghassemian, M

Kwak, CM

McCourt, P

Schroeder, JI ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Biol, La Jolla, CA 92093 USA

[2] Univ Calif San Diego, Ctr Mol Genet, La Jolla, CA 92093 USA

[3] Univ Toronto, Dept Bot, Toronto, ON M5S 3B2, Canada

来源：

SCIENCE | 1998年 / 282卷 / 5387期

关键词：

D O I：

10.1126/science.282.5387.287

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：

Desiccation of plants during drought can be detrimental to agricultural production. The phytohormone abscisic acid (ABA) reduces water loss by triggering stomatal pore closure in leaves, a process requiring ion-channel modulation by cytoplasmic proteins. Deletion of the Arabidopsis farnesyltransferase gene ERA1 or application of farnesyltransferase inhibitors resulted in ABA hypersensitivity of guard cell anion-channel activation and of stomatal closing. ERA1 was expressed in guard cells, Double-mutant analyses of era1 with the ABA-insensitive mutants abi1 and abi2 showed that era1 suppresses the ABA-insensitive phenotypes. Moreover, era1 plants exhibited a reduction in transpirational water loss during drought treatment.

引用

页码：287 / 290

页数：4

共 43 条

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