| Plant Physiol. 1972 May; 49(5): 842–847. | PMCID: PMC366062 |
Abscisic Acid and Stomatal Regulation 1P. E. Kriedemann, 2 B. R. Loveys, G. L. Fuller, and A. C. Leopold aDepartment of Horticulture, Purdue University, Lafayette, Indiana 47907 Abstract The closure of stomata by abscisic acid was examined in several species of plants through measurements of CO2 and H2O exchange by the leaf. The onset of closure was very rapid, beginning at 3 minutes from the time of abscisic acid application to the cut base of the leaf of corn, or at 8 or 9 minutes for bean, Rumex and sugarbeet; rose leaves were relatively slow at 32 minutes. The timing and the concentration of abscisic acid needed to cause closure were related to the amounts of endogenous abscisic acid in the leaf. Closure was obtained in bean leaves with 8.9 picomoles/cm2. (+)-Abscisic acid had approximately twice the activity of the racemic material. The methyl ester of abscisic acid was inactive, and trans-abscisic acid was likewise inactive. The effects of stress on levels of endogenous abscisic acid, and the ability of very small amounts of abscisic acid to cause rapid closure suggests that stomatal control is a regulatory function of this hormone. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (886K), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References. These references are in PubMed. This may not be the complete list of references from this article. - Ben-Zioni, Aliza; Itai, C; Vaadia, Y. Water and Salt Stresses, Kinetin and Protein Synthesis in Tobacco Leaves. Plant Physiol. 1967 Mar;42(3):361–365. [PubMed]
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