Variations in flavonoid patterns within the genus Chondropetalum (restionaceae) |
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Authors: | Jeffrey B Harborne Marian Boardley H Peter Lindert |
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Institution: | 1. Department of Botany, University of Reading, Reading RG6 2AS, U.K.;2. The Royal Botanic Gardens, Kew, Richmond, Surrey, U.K. |
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Abstract: | HPLC and chemical analyses of the flavonoids in culms of 11 Chondropetalum species divide the genus into two groups: seven, with glycosides of myricetin larycitin and syringetin; and four, with glycosides of kaempferol, quercetin, gossypetin, gossypetin 7-methyl ether and herbacetin 4′-methyl ether. This chemical dichotomy is correlated with anatomical differences and confirms the view that the genus requires taxonomic revision. HPLC measurements on those species with myricetin derivatives show that taxa with a qualitatively similar pattern of glycosides can be readily separated on quantitative grounds. Syringetin 3-arabinoside and a glycoside of herbacetin 4′-methyl ether are reported for the first time from the genus. |
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Keywords: | Restionaceae culms flavonoids myricetin derivatives syringetin 3-arabinoside gossypetin 7-methyl ether herbacetin 4′-methyl ether chemotaxonomy |
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