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Flavonoid Evolution in Robinsonia (Compositae) of the Juan Fernandez Islands

1985; Wiley; Volume: 72; Issue: 7 Linguagem: Inglês

10.2307/2443441

1537-2197

Patrícia Pacheco, Daniel J. Crawford, Tod F. Stuessy, Mario Silva O.,

Botany, Ecology, and Taxonomy Studies

American Journal of BotanyVolume 72, Issue 7 p. 989-998 Article FLAVONOID EVOLUTION IN ROBINSONIA (COMPOSITAE) OF THE JUAN FERNANDEZ ISLANDS Patricia Pacheco, Patricia Pacheco Department of Botany, Ohio State University, Columbus, Ohio, 43210 Departamento de Botánica, Universidad de Concepción, Concepción, ChileSearch for more papers by this authorDaniel J. Crawford, Daniel J. Crawford Department of Botany, Ohio State University, Columbus, Ohio, 43210 Departamento de Botánica, Universidad de Concepción, Concepción, ChileSearch for more papers by this authorTod F. Stuessy, Tod F. Stuessy Department of Botany, Ohio State University, Columbus, Ohio, 43210 Departamento de Botánica, Universidad de Concepción, Concepción, ChileSearch for more papers by this authorMario Silva O, Mario Silva O Department of Botany, Ohio State University, Columbus, Ohio, 43210 Departamento de Botánica, Universidad de Concepción, Concepción, ChileSearch for more papers by this author Patricia Pacheco, Patricia Pacheco Department of Botany, Ohio State University, Columbus, Ohio, 43210 Departamento de Botánica, Universidad de Concepción, Concepción, ChileSearch for more papers by this authorDaniel J. Crawford, Daniel J. Crawford Department of Botany, Ohio State University, Columbus, Ohio, 43210 Departamento de Botánica, Universidad de Concepción, Concepción, ChileSearch for more papers by this authorTod F. Stuessy, Tod F. Stuessy Department of Botany, Ohio State University, Columbus, Ohio, 43210 Departamento de Botánica, Universidad de Concepción, Concepción, ChileSearch for more papers by this authorMario Silva O, Mario Silva O Department of Botany, Ohio State University, Columbus, Ohio, 43210 Departamento de Botánica, Universidad de Concepción, Concepción, ChileSearch for more papers by this author First published: 01 July 1985 https://doi.org/10.1002/j.1537-2197.1985.tb08343.xCitations: 8AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract Leaf flavonoids were isolated and identified from 54 populations representing all seven species of Robinsonia, a genus of dioecious rosette trees endemic to the Juan Fernandez Islands. Fourteen compounds were detected consisting of flavonols, flavones, flavanones and dihydroflavonols. The distribution of these compounds in Robinsonia largely corresponds to specific and sectional limits based on morphological data. The morphologically similar species, R. gayana and R. thurifera, have identical flavonol profiles (derivatives of quercetin). Likewise, the closely related R. evenia and R. masafuerae are unique in the genus by possessing flavones. The inclusion of Rhetinodendron (i.e., R. berteroi) in Robinsonia is supported by its strong flavonoid similarity with species in two other sections of the genus. The morphologically diverse section Eleutherolepis exhibits the greatest flavonoid variation of any section, and only here are found flavones, flavanones and dihydroflavonols. The direction of flavonoid evolution in Robinsonia is hypothesized to be from fewer to more classes of compounds. Biosynthetic considerations suggest that this gain in compounds is due both to a gain of an additional enzymatic step and to the sequestering of precursors. This interpretation of direction of flavonoid evolution is in agreement with several lines of evidence including the flavonoid chemistry of the hypothesized outgroup (i.e., species of Senecio on mainland Chile), the ages of the two islands, and morphological trends. Citing Literature Volume72, Issue7July 1985Pages 989-998 RelatedInformation