Effect of Oleic Acid Derived Noion Type Surfactants on Male Flower Browning of Cryptomeria japonica

Abstract

Oleic acid and nonionic surfactants of oleic acid derivatives (Control, water; DGTO, diglycerol trioleate; GDO, Glycerol dioleate; GMO, Glycerol monooleate; PEDO, Pentaerythritol dioleate; STF, Sorbitan tri-fatty acid ester (16, 18, 18:1, 18:2, 18:3), STO: Sorbitan trioleate) were foliar-sprayed to Cryptomeria japonica and evaluated their browning effects on leaves and male flowers. All the tested surfactants exerted the selective effect on male flower browning, but that of Sorbitan trioleate was outstanding and thought to be promising for inhibition of pollen dispersal of Cryptomeria japonica. The male flower browning effect of these oleic acid derivatives was accompanied with inhibition of ethylene evolution and seemed to be closely related with their HLB values.