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Evidence for a Close Relationship Between Iostephane and Viguiera (Asteraceae: Heliantheae)

1991; Wiley; Volume: 78; Issue: 8 Linguagem: Inglês

10.2307/2444894

1537-2197

Edward E. Schilling, José L. Panero,

Natural product bioactivities and synthesis

American Journal of BotanyVolume 78, Issue 8 p. 1054-1062 Article EVIDENCE FOR A CLOSE RELATIONSHIP BETWEEN IOSTEPHANE AND VIGUIERA (ASTERACEAE: HELIANTHEAE) Edward E. Schilling, Edward E. Schilling Department of Botany, University of Tennessee, Knoxville, Tennessee, 37996–1100 Grinnell College, Grinnell, Iowa, 50112–0806Search for more papers by this authorJose L. Panero, Jose L. Panero Department of Botany, University of Tennessee, Knoxville, Tennessee, 37996–1100 Grinnell College, Grinnell, Iowa, 50112–0806Search for more papers by this author Edward E. Schilling, Edward E. Schilling Department of Botany, University of Tennessee, Knoxville, Tennessee, 37996–1100 Grinnell College, Grinnell, Iowa, 50112–0806Search for more papers by this authorJose L. Panero, Jose L. Panero Department of Botany, University of Tennessee, Knoxville, Tennessee, 37996–1100 Grinnell College, Grinnell, Iowa, 50112–0806Search for more papers by this author First published: 01 August 1991 https://doi.org/10.1002/j.1537-2197.1991.tb14513.xCitations: 6 Author for correspondence. AboutPDF 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 The phylogenetic relationship of Iostephane is assessed using data from morphology, flavonoid chemistry, and chloroplast DNA and nuclear ribosomal DNA restriction fragment analysis. Morphological evidence supports placement of Iostephane in subtribe Helianthinae, but fails to clarify the placement of the genus within this assemblage. Further evidence for the placement of Iostephane in subtribe Helianthinae is provided by the presence in all species of the genus of floral flavonoids of the chalcone/aurone type, which provides a distinctive trait for the subtribe within the tribe Heliantheae. Analysis of chloroplast DNA from two species of Iostephane, I. heterophylla and I. madrensis, in comparison to Viguiera and related genera indicates that the restriction site patterns with 16 enzymes for the Iostephane species are virtually identical to one another as well as to those of Viguiera sect. Maculatae. Data from restriction fragment patterns of nuclear rDNA are concordant with the results from chloroplast DNA in suggesting a direct relationship between the two groups. The close phylogenetic relationship between Iostephane and Viguiera sect. Maculatae suggested by the DNA restriction fragment data was not suggested by any other set of data. Citing Literature Volume78, Issue8August 1991Pages 1054-1062 RelatedInformation