Rapid adjustment of guard-cell abscisic Acid levels to current leaf-water status |
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| Authors: | Harris M J Outlaw W H |
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| Affiliation: | Department of Biological Science (B-157), Florida State University, Tallahassee, Florida 32306-3050. |
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| Abstract: | Detached broad bean (Vicia faba L.) leaflets were water stressed; within 15 minutes, guard-cell abscisic acid (ABA) concentration increased ninefold. This result eliminates the apparent discrepancy raised by reports of no correlation between initial water-stress effects on stomata and leaf ABA concentration. Six hours after stress relief, guard-cell ABA concentration was near the prestress value, which would seem to implicate other factors in stress aftereffects on stomata. |
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