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Foliar Trichomes of Pleurothallidinae (Orchidaceae): Functional Significance

1983; Wiley; Volume: 70; Issue: 2 Linguagem: Inglês

10.2307/2443261

1537-2197

David H. Benzing, Alec M. Pridgeon,

Flowering Plant Growth and Cultivation

American Journal of BotanyVolume 70, Issue 2 p. 173-180 Article FOLIAR TRICHOMES OF PLEUROTHALLIDINAE (ORCHIDACEAE): FUNCTIONAL SIGNIFICANCE D. H. Benzing, D. H. Benzing Department of Biology, Oberlin College, Oberlin, Ohio, 44074 Department of Biological Science, Florida State University, Tallahassee, Florida, 32306Search for more papers by this authorA. M. Pridgeon, A. M. Pridgeon Department of Biology, Oberlin College, Oberlin, Ohio, 44074 Department of Biological Science, Florida State University, Tallahassee, Florida, 32306Search for more papers by this author D. H. Benzing, D. H. Benzing Department of Biology, Oberlin College, Oberlin, Ohio, 44074 Department of Biological Science, Florida State University, Tallahassee, Florida, 32306Search for more papers by this authorA. M. Pridgeon, A. M. Pridgeon Department of Biology, Oberlin College, Oberlin, Ohio, 44074 Department of Biological Science, Florida State University, Tallahassee, Florida, 32306Search for more papers by this author First published: 01 February 1983 https://doi.org/10.1002/j.1537-2197.1983.tb07856.xCitations: 7AboutPDF 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 Foliar surfaces of nine pleurothallid orchids (Cryptophoranthus lepidotus L. O. Wms., Octomeria sp., Pleurothallis pidax Luer, P. poeppigii Lindl., P. revoluta (Ruiz & Pav.) Garay, Restrepiella ophiocephala (Lindl.) Garay & Dunsterv., Restrepia muscifera Rchb. f. ex Lindl., Scaphosepalum rapax Luer, Stelis endresii Rchb. f.), four nonpleurothallid orchids (Cyrtopodium punctatum (L.) Lindl., Encyclia cochleata (L.) Lemee, E. tampensis (Lindl.) Small, Paphiope-dilum hybrid) and five tillandsioid bromeliads (Catopsis nutans (Sw.) Griseb., Tillandsia fas-ciculata Sw., T. streptophylla Scheidw., T. stricta Soland., T. tectorum E. Morr.) were assayed for permeability to Ca, S and P ions. Compared to leaves of the atmospheric bromeliads, those of the orchids proved less permeable to Ca and S. Moisture exchange profiles were determined for two of the bromeliads and three orchids; bromeliad leaves were able to rehydrate completely, orchid leaves only partially. Absorptive capacities of trichomes borne by five taxa were tested by autoradiographic analysis. Unlike bromeliad trichomes, those of the orchids exhibited no capacity to accumulate 3H-leucine. These results and other considerations described here suggest that, unlike tillandsioid bromeliads, neither the pleurothallid nor the nonpleurothallid orchids examined in this survey rely heavily on shoots for mineral and moisture procurement. Citing Literature Volume70, Issue2February 1983Pages 173-180 RelatedInformation