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SENSITIVITY TO ABSCISIC ACID REGULATES STOMATAL OSCILLATION AND CLOSURE
IN ARABIDOPSIS THALIANA
QIU MU-QING1*AND ZHANG HAO2
Abstract:
Stomatal oscillation has been described as an efficient mechanism to
prevent water from loss, decrease the transpiration rate and to improve
water use efficiency under severe drought conditions. Former researches
demonstrated that ABA-induced H2O2 production and H2O2-activated Ca2+
channels were important mechanism for ABA-induced stomatal oscillation.
In this study, the sensitivity to abscisic acid (ABA) for regulation of
stomatal oscillation was investigated in Arabidopsis thaliana mutants
(abi1-1, insensitive to ABA and era1-2, hypersensitive to ABA) and wild
type. The results showed that (1) hypersensitive to ABA strengthen stomatal oscillation and closure induced by ABA; (2) insensitive to ABA
abolish stomatal oscillation and closure induced by ABA; and (3) there
is positive relationship between stomatal oscillation, closure and
sensitivity to abscisic acid. These data indicate that sensitivity to
ABA may regulate stomatal oscillation and closure in Arabidopsis
thaliana.
1Institution of Life Science, Shaoxing
University, Shaoxing, 312000, P.R. China
2Institution of Digital Agricultural Research, Zhejiang Academy of
Agricultural Sciences, Hangzhou, 310021 P. R. China
*Correspondence author e-mail:
qiumuqing@126.com
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