Premium
Reduced stomatal responses to light, carbon dioxide and abscisic acid in the presence of sodium ions
Author(s) -
JARVIS R. G.,
MANSFIELD T. A.
Publication year - 1980
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/1365-3040.ep11581831
Subject(s) - abscisic acid , chemistry , carbon dioxide , sodium , salt (chemistry) , ion , epidermis (zoology) , photosynthesis , botany , nuclear chemistry , biophysics , horticulture , biochemistry , biology , organic chemistry , gene , anatomy
Abstract Responses of stomata to light and CO 2 were smaller when detached epidermis of Commelina communis L. was incubated on a medium containing 50 mol m −3 NaCl than when an equimolar KCl solution was used. Although opening in the light in the absence of CO 2 seemed to be the same whichever salt was present, apertures on KCl solutions were smaller in the dark or with CO 2 ‐containing air. The response to 10 −7 mol dm −3 ABA was similarly reduced in the presence of NaCl. If there is an optimal NaCl concentration for stomatal CO 2 and light responses it is at or below 25 mol m −3 . These findings point towards control of stomatal movements by light, CO 2 and ABA at the level of cation uptake or extrusion.