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. 1998 Oct 9;282(5387):287-90.
doi: 10.1126/science.282.5387.287.

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

Z M Pei  1 , M Ghassemian, C M Kwak, P McCourt, J I Schroeder
Affiliations

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

Z M Pei et al. Science. .

Abstract

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.

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  • A plant's dilemma.
    Grill E, Ziegler H. Grill E, et al. Science. 1998 Oct 9;282(5387):252-3. doi: 10.1126/science.282.5387.252. Science. 1998. PMID: 9841390 No abstract available.

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