Light‐induced stomatal movement of selected Arabidopsis thaliana mutants

• Published in: Journal of experimental botany Vol. 51; no. 349; pp. 1435 - 1442
• Main Authors: Eckert, Martin, Kaldenhoff, Ralf
• Format: Journal Article
• Language: English
• Published: Oxford Oxford University Press 01.08.2000; OXFORD UNIVERSITY PRESS
• Subjects: Arabidopsis - genetics; Arabidopsis - physiology; Auxins; Biological and medical sciences; Dual beam irradiation; Fundamental and applied biological sciences. Psychology; gas exchange; Guard cells; Irradiation; Kinetics; Light; Light beams; light signal transduction; Mutation; phytohormone; Plant growth regulators; Plant physiology; Plant physiology and development; Plants; Plants and the Environment; Signal transduction; stomatal opening; Transpiration; Water and solutes. Absorption, translocation and permeability; Auxin; Genetic variant; Environmental factor; Arabidopsis thaliana; Signal transduction; Zeaxanthin; Regulation(control); Cruciferae; Dicotyledones; Sesquiterpenes; Indoleacetic acid; Light; Angiospermae; Stomatal movement; Abscisic acid; Plant growth substance; Spermatophyta; Gas exchange; Experimental plant; Photoregulation
• ISSN: 0022-0957; 1460-2431
• DOI: 10.1093/jexbot/51.349.1435

Various Arabidopsis thaliana mutants with defects in phytohormone signal transduction or the reception of light were analysed with regard to their stomatal response in a red, red/blue light irradiation programme. Stomatal response to light was detected with a customized gas exchange measurement device, optimized for the small model plant. Small transpiration‐kinetic variations of the two wild‐type lines Columbia (Col) and Landsberg erecta (Ler) were observed. A comparison of the mutant lines to the respective wild type revealed significant differences for the phytochrome A (phyA‐103), the abscisic acid insensitive (aba3‐2) and the auxin resistant (axr1‐3) mutant. Furthermore, the zeaxanthin‐less mutant line npq1‐2 showed no alterations in stomatal response to light.