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THE FLAVONOIDS OF ONAGRACEAE: TRIBE EPILOBIEAE
Author(s) -
Averett John E.,
Raven Peter H.,
Becker Hans
Publication year - 1979
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1979.tb06334.x
Subject(s) - biology , onagraceae , taxon , kaempferol , botany , myricetin , phyletic gradualism , tribe , chemotaxonomy , taxonomy (biology) , flavonoid , phylogenetics , genetics , biochemistry , sociology , gene , anthropology , antioxidant
Data for the flavonoids of each of the species of Boisduvalia and each of the 14 species of Epilobium that constitute the 5 sections except for sect. Epilobium are presented. An analysis of nearly 100 populations showed that 7 flavonol 3‐O‐glycosides based on kaempferol, quercetin, or myricetin aglycones are present among the several species. All 7 compounds are present in each of the 2 genera but certain patterns of variation, especially in the loss of arabinosides, are noted among the several sections of the two genera. An intersectional comparison of the variation correlates flavonoid patterns more with the relative evolutionary advancement of specialization of the taxa than with their phyletic relationships. Further, a trend of decreased glycosylation with advancement within the tribe is documented. Both points are contrary to what is generally assumed for flavonoids in evolutionary studies.