Abstract
Abstract — The aim of this study was to explore the systematic position of the fungi associated with the roots of M. uniflora in two localities of Tlaxcala, Mexico, using a phylogenetic approach. Thirty plants were sampled, fifteen from a coniferous forest dominated by Abies religiosa in La Malinche National Park, and fifteen from a mixed conifer-broadleaf forest dominated by Pseudotsuga menziesii in Sierra de Tlaxco. Our ITS analysis confirms the preference of M. uniflora to associate with Russulaceae, in particularly with Russula species. The roots of each plant were associated with a single fungal ITS sequence. They were analyzed phylogenetically by maximum likelihood, and were recovered in 12 moderate to well-supported clades within the genus Russula. In each of these clades only a single Russula species was associated with Monotropa in Mexico, except for clade Integrae for which two Mexican species were retrieved. A total of 13 Russula species were retrieved from the 30 Monotropa plants, four from La...
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