Phlox の花色に関する研究 (第2報)

Abstract

The F2 plants of Phlox drummondii raised from the cross 38(violet)×26(white) and 38×39(oriental red) were classified in 10 visible colors and in 7 chromatogram types.As to anthocyanidin, in F2 plants from 38×39, cyanidin- malvidin- delphinidin production was incompletely dominant to pelargonidin production. And in 38×26, the white type was recessive to the colored.For glycosylation, 3:5-glycoside type was dominant to 3-glycoside type.As for the plants of which the chromatogram type was C, D, E and F, the same composition of anthocyanins exhibited the various colors and this phenomenon was assumed to be mainly due to co-pigmentation, because the deepening in blueness was in proportion to the increasing in the F/A ratio.In order to evaluate the effect of co-pigmentation of malvidin 3:5-diglucoside with luteolin 5:7-xyloside-glucoside in vitro, both pigments were mixed in various proportions. And it was confirmed with the absorption spectra of the mixtures that the absorption maxima of the mixtures shifted to longer wave-length in the visible region, as increasing of the concentration of luteolin glycoside, but in the ultraviolet region the absorption of the mixtures decreased as compared with that of luteolin glycoside.