The activity of abscisic acid analogues as inhibitors of stomatal opening

摘要

Ten analogues of abscisic acid (ABA) have been tested for their activity in assays based on the induction of stomatal closing on isolated epidermis ofCommelina communisL., and the inhibition of opening on intact leaves ofXanthium strumariumL. Three of the analogues showed activity comparable to that of ABA on the stomata ofCommelina. The same analogues also showed similar activity and persistence as ABA when applied to the leaf surfaces ofXanthium. Molecular requirements for activity on stomata agree closely with those for activity in theAvenacoleoptile assay. The possible value of the analogues as antitranspirants is considered.