Rapid Adjustment of Guard-Cell Abscisic Acid Levels to Current Leaf-Water Status
- 1 January 1991
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 95 (1), 171-173
- https://doi.org/10.1104/pp.95.1.171
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.Keywords
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