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

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 farnesyltransfera...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 1998-10, Vol.282 (5387), p.287-290
Hauptverfasser:	Pei, Z.M. (University of California, San Diego, CA.), Ghassemian, M, Kwak, C.M, McCourt, P, Schroeder, J.I
Format:	Artikel
Sprache:	eng
Schlagworte:	ABA Abscisic Acid - metabolism Abscisic Acid - pharmacology Agricultural Production Agronomy. Soil science and plant productions Alkyl and Aryl Transferases - antagonists & inhibitors Alkyl and Aryl Transferases - genetics Alkyl and Aryl Transferases - metabolism Anions ARABIDOPSIS Arabidopsis - cytology Arabidopsis - genetics Arabidopsis - metabolism Arabidopsis Proteins Biological and medical sciences CELLS CELLULE CELULAS DEHYDRATION DESHIDRATACION DESHYDRATATION DESICCATION Drought Economic plant physiology Enzyme Inhibitors - pharmacology Farnesol - analogs & derivatives Farnesol - pharmacology Flowers & plants Fundamental and applied biological sciences. Psychology Gene Deletion Gene Expression Gene expression regulation Genes, Plant Genetic mutation GENETIC REGULATION GENETICA GENETICS GENETIQUE Guard cells Ion Channels - metabolism LEAF CONDUCTANCE Leaves Mutation Organophosphonates - pharmacology Patch-Clamp Techniques Phosphoprotein Phosphatases - genetics Phosphoprotein Phosphatases - metabolism Plant cells Plant Leaves - cytology Plant Leaves - genetics Plant Leaves - metabolism Plant physiology and development Plants Plants, Genetically Modified Polyenes - pharmacology Polyunsaturated Alkamides Protein Prenylation Signal Transduction Space life sciences Stomata TRANSFERASAS TRANSFERASE TRANSFERASES TRANSPIRACION TRANSPIRATION Water Water - metabolism Water and solutes. Absorption, translocation and permeability Water loss Water relations, transpiration, stomata
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Zusammenfassung:	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
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.282.5387.287