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Plicate Staminal Filaments in Tillandsia Subgenus Anoplophytum (Bromeliaceae)

1989; Wiley; Volume: 76; Issue: 10 Linguagem: Inglês

10.2307/2444435

1537-2197

Timothy M. Evans, Gregory K. Brown,

Plant Diversity and Evolution

American Journal of BotanyVolume 76, Issue 10 p. 1478-1485 Article PLICATE STAMINAL FILAMENTS IN TILLANDSIA SUBGENUS ANOPLOPHYTUM (BROMELIACEAE) Timothy M. Evans, Timothy M. Evans Department of Botany, University of Wyoming, Laramie, Wyoming, 82071-3165Search for more papers by this authorGregory K. Brown, Gregory K. Brown Department of Botany, University of Wyoming, Laramie, Wyoming, 82071-3165Search for more papers by this author Timothy M. Evans, Timothy M. Evans Department of Botany, University of Wyoming, Laramie, Wyoming, 82071-3165Search for more papers by this authorGregory K. Brown, Gregory K. Brown Department of Botany, University of Wyoming, Laramie, Wyoming, 82071-3165Search for more papers by this author First published: 01 October 1989 https://doi.org/10.1002/j.1537-2197.1989.tb15129.xCitations: 4 All 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 Plication of staminal filaments is an important diagnostic character for Tillandsia subgenus Anoplophytum (ca. 45 species). The monophyletic integrity of subgenus Anoplophytum has recently been questioned, and we conducted an anatomical investigation of plicate staminal filaments to better characterize this putative synapomorphy. Developmental studies show that the filament plications, or folds, become visible during or soon after anthesis. Serial sections of preplication filaments and filaments in sequential stages of plication were prepared and observed with light microscopy. A uniform sequence of parenchyma cell collapse begins three to four cell layers out from the vascular bundle and proceeds centrifugally to the epidermis. Eventually the epidermal cells collapse, leaving only the vascular bundle and a few surrounding parenchyma cells intact. Above and below the zone of plication, all parenchyma and epidermal cells in the filament remain intact. Species traditionally placed in subgenera Tillandsia and Allardtia have been found with plicate staminal filaments that are anatomically and develop-mentally identical to those studied from subgenus Anoplophytum. Alone, staminal filament plication does not appear to be a good diagnostic character for subgenus Anoplophytum, and doubts concerning the monophylesis of this subgenus are reinforced. The functional significance of stamen filament plication remains unknown. Citing Literature Volume76, Issue10October 1989Pages 1478-1485 RelatedInformation