title: Benzaldehyde O-Alkyloximes as New Plant Growth Regulators.
abstract: Fourty-two kinds of benzaldehyde O-alkyloximes derived from benzaldehydes were prepared and their biological activities were investigated. Introduction of a fluorine or bromine atom to the benzene ring of the oximes enhanced their phytotoxic activity. The O-alkyloximes with a fluorine atom at the 3 or 4 position of the benzene ring were more active than the other oximes in the GA3-induced α-amylase induction inhibition test. In the transpiration test, 4-bromobenzaldehyde O-carboxylmethyloxime was the most active. The O-alkyloximes exhibited weak abscisic acid-like activity by inhibiting not only the germination, root growth and transpiration of higher plants but also GA3-induced α-amylase induction in embryoless barley seeds.
authors.affiliation: a Department of Environmental Chemistry, Kyushu Kyoritsu University.
authors.forename: H
authors.initials: H
authors.lastname: Yoshikawa
authors.affiliation: a Department of Environmental Chemistry, Kyushu Kyoritsu University.
authors.forename: K
authors.initials: K
authors.lastname: Doi
keywords: benzaldehyde O-alkyloximes; growth inhibitor; transpiration; α-amylase induction