Convergence of the abscisic acid, CO2, and extracellular calcium signal transduction pathways in stomatal guard cells

• Published in: Plant physiology (Bethesda) Vol. 114; no. 4; pp. 1557 - 1560
• Main Authors: Webb, A.A.R, Hetherington, A.M
• Format: Journal Article
• Language: English
• Published: Rockville, MD American Society of Plant Physiologists 01.08.1997
• Subjects: ABA; Abscisic Acid - metabolism; Arabidopsis - genetics; Arabidopsis - metabolism; ARABIDOPSIS THALIANA; BIOCHEMICAL PATHWAYS; Biological and medical sciences; CALCIO; CALCIUM; Calcium - metabolism; CARBON DIOXIDE; Carbon Dioxide - metabolism; Cell physiology; CELLS; CELLULE; CELULAS; DIOXIDO DE CARBONO; DIOXYDE DE CARBONE; ESTOMA; Fundamental and applied biological sciences. Psychology; Gene expression regulation; Genetic loci; GENETIC VARIATION; Guard cells; ION; ION UPTAKE; IONES; IONS; Molecular and cellular biology; MOUVEMENT; MOVEMENT; MOVIMIENTO; MUTANT; MUTANTES; MUTANTS; Mutation; Phosphatases; Plant cells; Plant physiology and development; Plants; Rapid Communication; Receptors; REGULATION; Signal Transduction; Space life sciences; STOMATA; STOMATE; Turgor pressure; VARIACION GENETICA; VARIATION GENETIQUE; VIA BIOQUIMICA DEL METABOLISMO; VOIE BIOCHIMIQUE DU METABOLISME; Water and solutes. Absorption, translocation and permeability; Calcium; Carbon dioxide; Guard cell; Arabidopsis thaliana; Response; Signal transduction; Cruciferae; Dicotyledones; Angiospermae; Stomatal movement; Abscisic acid; Spermatophyta; Mutation; Experimental plant
• ISSN: 0032-0889; 1532-2548
• DOI: 10.1104/pp.114.4.1557

We show that guard cells from Arabidopsis thaliana plants carrying the abscisic acid-insensitive mutations abi1 and abi2 fail to respond to CO2 and extracellular calcium. This demonstrates that the signal transduction pathways for all three stimuli converge on, or close to, the ABI1 and ABI2 gene products