Methylenedioxyphenyl and Its Related Compounds as Protectants against Ozone Injury to Plants

Abstract

Methylenedioxyphenyl derivatives and the compounds structurally related to piperonyl butoxide, which has been found to be a potent protectant against ozone injury to plants, were tested for effectiveness against the same injury to tobacco leaves. Five of 90 materials tested, namely 3, 4-methylenedioxyphthaldehyde, benzimidazole, safroxane, xanthone and piperonal, showed high protective activity though the effectiveness was inferior to piperonyl butoxide. The protective mechanism was discussed.