Synergism between calcium ions and abscisic acid in preventing stomatal opening

The inhibition of stomatal opening in Commelina communis L. by abscisic acid (ABA) appears to be dependent on the availability of calcium ions. Incubation of epidermal strips in 10-6mol m-3ABA had little effect in the absence of calcium, and a factorial experiment showed a highly significant calcium...

Full description

Saved in:
Bibliographic Details
Published in:The New phytologist 1985-01, Vol.100 (4), p.473-482
Main Authors: De Silva, D.L.R, Hetherington, A.M, Mansfield, T.A
Format: Article
Language:English
Subjects:
abscisic acid
Biological and medical sciences
Calcium
Cell membranes
Commelina communis
Epidermal cells
Epidermis
Fundamental and applied biological sciences. Psychology
Guard cells
inhibition
ions
Plant cells
Plant physiology and development
Plants
Potassium
Stomata
stomatal movement
synergism
Turgor pressure
Water and solutes. Absorption, translocation and permeability
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The inhibition of stomatal opening in Commelina communis L. by abscisic acid (ABA) appears to be dependent on the availability of calcium ions. Incubation of epidermal strips in 10-6mol m-3ABA had little effect in the absence of calcium, and a factorial experiment showed a highly significant calcium x ABA interaction. The effect of calcium appeared to be on the later stages of the opening process, and might have been the result of an inhibition of potassium uptake by the guard cells. There was no detectable effect of ABA when EGTA was used to chelate calcium from the apoplastic space. The data are consistent with the hypothesis that ABA increases the permeability of the plasma membranes of the guard cells to calcium. Calcium might then operate as a second messenger to regulate the ionic fluxes that determine guard cell turgor.
ISSN:0028-646X
1469-8137
DOI:10.1111/j.1469-8137.1985.tb02795.x