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Evolutionary history of mycorrhizal specificity among lady's slipper orchids

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dc.contributor.author Shefferson, R. P. en
dc.contributor.author Taylor, D. L. en
dc.contributor.author Weiss, M. en
dc.contributor.author Garnica, S. en
dc.contributor.author McCormick, Melissa K. en
dc.contributor.author Adams, S. en
dc.contributor.author Gray, H. M. en
dc.contributor.author McFarland, J. W. en
dc.contributor.author Kull, T. en
dc.contributor.author Tali, K. en
dc.contributor.author Yukawa, T. en
dc.contributor.author Kawahara, T. en
dc.contributor.author Miyoshi, K. en
dc.contributor.author Lee, Y. I. en
dc.date.accessioned 2012-02-16T13:41:45Z
dc.date.available 2012-02-16T13:41:45Z
dc.date.issued 2007
dc.identifier.citation Shefferson, R. P., Taylor, D. L., Weiss, M., Garnica, S., McCormick, Melissa K., Adams, S., Gray, H. M., McFarland, J. W., Kull, T., Tali, K., Yukawa, T., Kawahara, T., Miyoshi, K., and Lee, Y. I. 2007. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F17831">Evolutionary history of mycorrhizal specificity among lady&#39;s slipper orchids</a>." <em>Evolution</em>. 61:1380&ndash;1390. en
dc.identifier.issn 0014-3820
dc.identifier.uri http://hdl.handle.net/10088/17831
dc.description.abstract Although coevolution is acknowledged to occur in nature, coevolutionary patterns in symbioses not involving species-to-species relationships are poorly understood. Mycorrhizal plants are thought to be too generalist to coevolve with their symbiotic fungi; yet some plants, including some orchids, exhibit strikingly narrow mycorrhizal specificity. Here, we assess the evolutionary history of mycorrhizal specificity in the lady&#39;s slipper orchid genus, Cypripedium. We sampled 90 populations of 15 taxa across three continents, using DNA methods to identify fungal symbionts and quantify mycorrhizal specificity. We assessed phylogenetic relationships among sampled Cypripedium taxa, onto which we mapped mycorrhizal specificity. Cypripedium taxa associated almost exclusively with fungi within family Tulasnellaceae. Ancestral specificity appears to have been narrow, followed by a broadening after the divergence of C. debile. Specificity then narrowed, resulting in strikingly narrow specificity in most of the taxa in this study, with no taxon rewidening to the same extant as basal members of the genus. Sympatric taxa generally associated with different sets of fungi, and most clades of Cypripedium-mycorrhizal fungi were found throughout much of the northern hemisphere, suggesting that these evolutionary patterns in specificity are not the result of biogeographic lack of opportunity to associate with potential partners. Mycorrhizal specificity in genus Cypripedium appears to be an evolvable trait, and associations with particular fungi are phylogenetically conserved. en
dc.relation.ispartof Evolution en
dc.title Evolutionary history of mycorrhizal specificity among lady&#39;s slipper orchids en
dc.type Journal Article en
dc.identifier.srbnumber 55264
rft.jtitle Evolution
rft.volume 61
rft.spage 1380
rft.epage 1390
dc.description.SIUnit serc en
dc.citation.spage 1380
dc.citation.epage 1390

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