INHIBITION OF THE STOMATAL BLUE-LIGHT RESPONSE BY VERAPAMIL AT HIGH-CONCENTRATION

Authors
SHIMAZAKI K TONAINAGA M SHIGENAGA A
Citation
K. Shimazaki et al., INHIBITION OF THE STOMATAL BLUE-LIGHT RESPONSE BY VERAPAMIL AT HIGH-CONCENTRATION, Plant and Cell Physiology, 38(6), 1997, pp. 747-750
Citations number
33
Categorie Soggetti
Plant Sciences
Journal title
Plant and Cell Physiology → ACNP
ISSN journal
00320781
Volume
38
Issue
6
Year of publication
1997
Pages
747 - 750
Database
ISI
SICI code
0032-0781(1997)38:6<747:IOTSBR>2.0.ZU;2-T
Abstract
Blue light-dependent proton pumping in guard cell protoplasts and ligh t-induced stomatal opening in the epidermis were inhibited by 1 mM ver apamil, a Ca2+ channel blocker. Proton pumping and stomatal opening in duced by fusicoccin, an activator of plasma membrane proton pump, were not inhibited by verapamil, These results suggest that verapamil inhi bits blue light signaling in guard cells without inhibiting the pump.