Synthesis and Biological Activity of Benzaldehyde O-Alkyloximes as Abscisic Acid Mimics (Part 1)

Twenty-four benzaldehyde O-alkyloximes having a carboxylic moiety at the α-position of the oxime-oxygen atom were prepared as abscisic acid (ABA) mimics. Their effects on some physiological and biochemical processes of selected plant species were investigated in comparison to those of ABA. The mimics exhibited ABA-like activity by inhibiting germination and α-amylase induction. They also induced stomatal closure coupled with a reduction in transpiration.