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Abstract Detail

Mycological Section

DeMers, Mara [1], Methven, Andrew Scott [2], Gerenday, Anna [3], Kennedy, Peter [1].

Exploring Lactarius chrysorrheus diversity in North America.

The genus Lactarius is a large group of ectomycorrhizal mushrooms known for the production of latex. This latex has potential applications in alternative rubber production. To that end, we were asked to determine the identity of a Lactarius specimen from Oregon resembling L. chrysorrheus. L. chrysorrheus is known from Europe but is morphologically similar to the North American species L. vinaceorufescens and L. xanthogalactus. We sequenced the ITS and LSU loci from the specimen of interest as well as from collections of L. xanthogalactus, L. vinaceorufescens, and L. chrysorrheus from across the United States, and compared them together with sequences obtained from GenBank. Our target specimen formed a well-supported group with all available L. xanthogalactus, in contrast to Hesler & Smith (1979) who did not recognize this species. The L. chrysorrheus specimens that did not come from the West Coast clustered instead with either L. vinaceorufescens or a third group containing L. chrysorrheus sequences but distinct from the European L. chrysorrheus clade. Furthermore, all of these appear to be closely related, but we found that other species were not as closely related as morphology would predict. Many relationships remain unresolved in Lactarius systematics.

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1 - University of Minnesota, Plant Biological Sciences, 250 Biological Sciences, 1445 Gortner Ave, Saint Paul, MN, 55108, USA
2 - Eastern Illinois University, Biological Sciences, 600 Lincoln Avenue, Charleston, IL, 61920, USA
3 - University of Minnesota, J.F. Bell Museum of Natural History, 1445 Gortner Ave, Saint Paul, MN, 55108, USA


Presentation Type: Poster:Posters for Sections
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PMY007
Abstract ID:771
Candidate for Awards:MSA Best Poster Presentation Award by a Graduate Student

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