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Characterization of Lactarius tesquorum Ectomycorrhizae on Cistus sp. and Molecular Phylogeny of Related European Lactarius Taxa

Jorinde Nuytinck, Annemieke Verbeken, Andrea C. Rinaldi, Marco Leonardi, Giovanni Pacioni and Ornella Comandini
Mycologia
Vol. 96, No. 2 (Mar. - Apr., 2004), pp. 272-282
DOI: 10.2307/3762063
Stable URL: http://www.jstor.org/stable/3762063
Page Count: 11
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Characterization of Lactarius tesquorum Ectomycorrhizae on Cistus sp. and Molecular Phylogeny of Related European Lactarius Taxa
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Abstract

Lactarius is one of the larger genera of ectomycorrhizal Basidiomycota, with about 400 species recognized worldwide. The ectomycorrhizae formed by Lactarius tesquorum on Cistus sp., one of the most common and ecologically relevant shrubs in the semi-arid regions in the Mediterranean basin, are described here in terms of morphological, anatomical and molecular features. An ITS rDNA sequence-based phylogenetic analysis was performed on the related European Lactarius taxa (L. mairei, L. pubescens, L. scoticus, L. spinosulus, L. torminosulus and L. torminosus) currently classified together with L. tesquorum in the subgenus Piperites section Piperites. Piperites s.s. could be divided into two main clusters; L. mairei and especially L. spinosulus were related less closely to the other taxa. This study is part of a broader effort to extend our knowledge of the distribution, phylogeny and ectomycorrhizal biology of Lactarius species in selected ecosystems.

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