ABA ACCUMULATION AND DISTRIBUTION DURING THE LEAF TISSUES SHOWS ITS ROLE STOMATAL CONDUCTANCE REGULATION UNDER
SHORT-TERM SALINITY
G. R. Akhiyarova,1 W. Fricke,2 D. S. Veselov,1
G. R. Kudoyarova,1 S. Yu. Veselov 3
1 Institute of Biology RAS, Ufa, 2 Department of Biology, Paisly University, Paisly, UK,
and 3 State University, Ufa;
e-mail: veselov@anrb.ru
The regulative role of ABA in the rapid plant stomatal reactions in response to salinity was investigated. The
influence of the short-term salinity on the overall ABA accumulation and its distribution within the mature leaf
(revealed by immunohystochemical technique) and stomatal conductance of barley (Hordeum vulgare L.) were
determined. Rapid bulk leaf ABA accumulation and increase in ABA immunolabeling in the mesophyl and guard cells of
stomata were shown. The bulk ABA increasing in mature barley leaves coincided with stomatal closure induced by salt
treatment indicating on the ABA contribution to the rapid stomatal closure.
