TreeBASE Search-Trees for study 12727

@ARTICLE{TreeBASE2Ref20716, author = {Maria Belen Pildain and Mario Rajchenberg}, title = {The phylogenetic disposition of Postia s.l. (Polyporales, Basidiomycota) from Patagonia, Argentina}, year = {2012}, keywords = {Antrodia clade, Ryvardenia, molecular phylogeny, nuclear behavior, mating type}, doi = {}, url = {http://}, pmid = {}, journal = {Mycologia}, volume = {}, number = {}, pages = {}, abstract = {We determined the phylogenetic relationships of Postia species from Patagonia using rDNA ITS and LSU sequences, coupling the information with morphological, cultural, and biological features. All the species in the genus were included in a ?Postia clade? irrespective of whether their spores were thin or thick-walled. This clade is characterized by tetrapolarity, a normal nuclear behavior, metachromatic generative hyphae, and by cultures that do not form fiber hyphae. One subclade merged the austral taxa P. pelliculosa and P. punctata but, otherwise, no distinct relationships were found regarding spore shape, spore wall thickness and geographical distribution of taxa. The austral P. venata and the endemic P. carbophila, with thin-walled basidiospores, showed a variable, non fixed position in both analyses. P. caesia from Patagonia merged within the P. caesia species complex but showed a strong geographical isolation. On the contrary, P. rennyi and P. balsamea from Patagonia corresponded well with strains from other geographic areas. The two austral species in Ryvardenia, R. cretacea and R. campyla, characterized by non-metachromatic hyphae, bipolarity and an astatocoenocytic nuclear behavior, formed an independent subclade among the dimitic genera of the ?Antrodia clade?, far from other Postia taxa within which they had been placed previously, supporting their inclusion in a genus of their own. Postia carbophila merged with other Postia species and not with Rhodonia placenta as suggested previously on the basis of morphological comparisons. Instead, the latter species and genus grouped with taxa in the dimitic genus Amyloporia with which it shares a heterocytic nuclear behavior. A separation between specimens of Postia pelliculosa and Ryvardenia cretacea from either side of the Pacific, i.e. SE Australia/New Zealand and S Argentina/S Chile, suggests they could be considered different at the species level from a phylogenetic point of view.} }