Further flavonoid studies onAttalea species and some related cocosoid palms |
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Authors: | Christine A Williams Jeffrey B Harborne Sidney F Glassman |
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Institution: | (1) Botany Department, The University, Whiteknight, RG6 2AS Reading, Berkshire, England, U.K.;(2) Department of Biological Sciences, The University of Illinois, 60680 Chicago, IL, USA |
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Abstract: | In a flavonoid survey of direct and hydrolysed leaf extracts of sixteenAttalea, sevenScheelea and fourOrbignya species free tricin, tricin 7-glycosides, tricin 5-glucoside and flavone C-glycosides were the most frequent constituents; present in 100, 89, 70, and 81% of species, respectively. Luteolin, quercetin and isorhamnetin were each found in only 15% of the sample. The present results confirm the findings of a previous survey thatAttalea, Scheelea andOrbignya are chemically heterogeneous with as much variation between species as between genera. Furthermore, threeAttalea species,A. allenii, A. guaranitica andA. victoriana showed some infraspecific variation. On the other hand all three accessions ofA. ferruginea and six ofA. geraensis examined gave identical flavonoid profiles. The results support the view thatA. geraensis andA. guaranitica are closely related but do not support the suggested close relationship based on morphology betweenA. oleifera, A. burretiana andA. piassabossu. |
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Keywords: | Angiosperms Palmae Arecaceae Cocosoideae Attalea Scheelea Orbignya Flavones flavonols flavone C-glycosides flavonoid sulphates chemosystematics |
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