Two species of Calystegia, C. soldanella and C. japonica which both are vine perennials belong to Convolvulaceae habituated in extremely different environment. In order to elucidate the effect of flavonoids to tolerat...Two species of Calystegia, C. soldanella and C. japonica which both are vine perennials belong to Convolvulaceae habituated in extremely different environment. In order to elucidate the effect of flavonoids to tolerate environmental stress we chose a sand-dune plant C. soldanella, under unfavorable conditions such as nutrients deficiency, strong irradiance, and broad differences of temperature during day and night and compared this plant with C. japonica habituated under mild environment. Several kinds of flavonoids were found in both plants. Especially, quercetin glycosides and kaempferol glycosides were found as major flavonols in both plants. In C. soldanella, kaempferol 3-O-galacto-sidee-7-O-glucoside, kaempferol 3-O-digalactoside-7-O-glucoside, kaempferol 3-O-galactoside-7-O-galactoside and 4’-hydroxyflavone 7-O-glucoside were found. While in C. japonica, quercetin 3-O-galactoside 7-O-glucuronide, quercetin 3,7-O-digalactoside and kaempferol 3-O-galactoside 7-O-glucoside were found. Also, kaempferol glycoside was a major flavonol in C. soldanella, in contrast to quercetin glycoside as major flavonol in C. japonica. The content of total phenolic compounds was similar in two species but the content of total flavonoid compounds was higher by 1.5 times in C. japonica than that of C. soldanella.展开更多
文摘Two species of Calystegia, C. soldanella and C. japonica which both are vine perennials belong to Convolvulaceae habituated in extremely different environment. In order to elucidate the effect of flavonoids to tolerate environmental stress we chose a sand-dune plant C. soldanella, under unfavorable conditions such as nutrients deficiency, strong irradiance, and broad differences of temperature during day and night and compared this plant with C. japonica habituated under mild environment. Several kinds of flavonoids were found in both plants. Especially, quercetin glycosides and kaempferol glycosides were found as major flavonols in both plants. In C. soldanella, kaempferol 3-O-galacto-sidee-7-O-glucoside, kaempferol 3-O-digalactoside-7-O-glucoside, kaempferol 3-O-galactoside-7-O-galactoside and 4’-hydroxyflavone 7-O-glucoside were found. While in C. japonica, quercetin 3-O-galactoside 7-O-glucuronide, quercetin 3,7-O-digalactoside and kaempferol 3-O-galactoside 7-O-glucoside were found. Also, kaempferol glycoside was a major flavonol in C. soldanella, in contrast to quercetin glycoside as major flavonol in C. japonica. The content of total phenolic compounds was similar in two species but the content of total flavonoid compounds was higher by 1.5 times in C. japonica than that of C. soldanella.
