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New North American truffles ( Tuber spp.) and their ectomycorrhizal associations

2013; Taylor & Francis; Volume: 105; Issue: 1 Linguagem: Inglês

10.3852/12-087

1557-2536

Gonzalo Guevara, Gregory Bonito, James M. Trappe, Efrén Cázares, G. Williams, Rosanne Healy, Christopher W. Schadt, Rytas Vilgalys,

Forest Ecology and Biodiversity Studies

AbstractRecent surveys of belowground fungal biodiversity in México and USA have revealed many undescribed truffle species, including many in the genus Tuber. Here we describe seven new species: Tuber beyerlei, T. castilloi, T. guevarai, T. lauryi, T. mexiusanum, T. miquihuanense and T. walkeri. Phy-logenetic analyses place these species within the Maculatum group, an understudied clade of small truffles with little apparent economic value. These species are among the more taxonomically challenge-ing in the genus. We collected Tuber castilloi, T. mexiusanum and T. guevarai as fruit bodies and ectomycorrhizae on Quercus spp. in forests of eastern México. Tuber mexiusanum has a particularly broad geographic range, being collected in eastern USA under Populus deltoides and in Minnesota and Iowa in mixed hardwood forests. T. walkeri is described from the upper midwestern USA, and T. lauryi and T. beyerlei occur in the western USA.Key words: AscomycotaEctomycorrhizaehypo-geous fungiPezizalesPezizomycetesphylogeny AcknowledgmentsThe senior author thanks the DGEST (Direction General de Education Superior Tecnologica, SES, ANUIES and CONACyT) for financially supporting this research. Participation by Efren Cázares and James Trappe was supported by National Science Foundation award DBI-0098534 and the U.S. Forest Service, Pacific Northwest Research Station. Gregory Bonito, Rytas Vilgalys and Christopher Schadt were supported through the Department of Energy, Office of Biological and Environmental Research, Genome Science Program. Rosanne Healy was supported by the Iowa Science Foundation and the Minnesota Department of Natural Resources. We thank Hannah Reynolds for generating sequence data on Tuber ectomycorrhizae of Populus, Jesús García for loans of Tuber specimens. These herbaria generously accessioned and curated our collections: Duke University, Durham, North Carolina (DUKE); Instituto Tecnológico de Ciudad Victoria, México (ITCV) ; Iowa State University, Ames (ISC); Oregon State University, Corvallis (OSC); University of Minnesota, Ames (MIN).