Reduction of Transpiration of Leaves through Stomatal Closure Induced by Alkenylsuccinic Acids

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Science  14 Feb 1964:
Vol. 143, Issue 3607, pp. 692-693
DOI: 10.1126/science.143.3607.692


Low concentrations of long-chain alkenylsuccinic acids and certain of their derivatives inhibit stomatal opening in a tobacco-leaf disk assay, and when used as a spray. The monomethyl ester of decenylsuccinic acid is presently the most effective of this class of compounds. Stomatal closure induced with this substance is accompanied by a significant reduction in the rate of transpiration. These inhibitors probably close stomata by altering the permeability of the membranes of the guard cells.