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ELEVATIONAL VARIATION IN FOLIAR FLAVONOIDS OF QUERCUS RUBRA L. (FAGACEAE)
Author(s) -
McDougal Karen M.,
Parks Clifford R.
Publication year - 1984
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.1537-2197.1984.tb12518.x
Subject(s) - fagaceae , chemotype , biology , cline (biology) , botany , myricetin , kaempferol , saxifragaceae , ericaceae , quercetin , population , biochemistry , demography , sociology , essential oil , antioxidant
Foliar extracts of high elevation Quercus rubra contain 20 major flavonol‐3‐0‐glycosides based primarily on the aglycones myricetin, quercetin, and kaempferol. These compounds display an altitudinal cline in the Appalachian mountains, with quercetin‐rich low elevation chemotypes intergrading into myricetin‐rich high elevation forms. These chemotypes appear to be correlated with previously documented variation in foliar morphology. The degree of interpopulation variation also differs with elevation. At higher elevations flavonoids differ only quantitatively between sites, while below 3,000 ft there is site‐to‐site variability in the hydroxylation level of the aglycones.