Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/10582
Research center of Embrapa/Collection: Embrapa Meio Ambiente - Artigo em periódico indexado (ALICE)
Date Issued: 1988
Type of Material: Artigo em periódico indexado (ALICE)
Authors: GARCEZ, F. R.
SCRAMIN, S.
NASCIMENTO, M. C. de
MORS, W. B.
Additional Information: EMBRAPA-CNPMA.
Title: Prenylated flavonoids as evolutionary indicators in the genus Dahlstedtia.
Publisher: Phytochemistry, v.27, n.4, p.1079-1083, 1988.
Language: Ingles
Keywords: Dahlstedtia pinnata
Dahlstedtia pentaphylla
Substance
Flavonoid
Description: Abstract: Three chalcones, two beta-hydroxychalcones, four flavanones, six flavones, four flavonols, one rotenoid and one pterocarpan were isolated from the roots of Dahlstedtia pinnata and D. pentaphylla. With the exception of the pterocarpan, all the compounds exhibit prenylation in the A ring, a characteristic of flavonoids produced by species of the Tephrosieae. Of the 21 flavonoids identified, five (2 flavanones and 3 flavones) are new as naturally occurring compounds. A neat distinction in the biosynthetic capability of the two species, leading to the production of flavanones and flavonols in D. pentaphylla, but not in D. pinnata, is observed. In this latter species, biosynthesis is totally oriented toward dehydrogenation, producing flavones. By both criteria-higher oxidation state and suppression of enzyme systems-D. pinnata is the more advanced species.
Data Created: 1993-06-30
Appears in Collections:Artigo em periódico indexado (CNPMA)

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