Biology

Molecular phylogenetics of the Gloeophyllales and relative ages of clades of Agaricomycotina producing a brown rot

Document Type

Article

Abstract

The Gloeophyllales is a recently described order of Agaricomycotina containing a morphologically diverse array of polypores (Gloeophyllum), agarics (Neolentinus, Heliocybe) and resupinate fungi (Veluti-Veluticeps, Boreostereum, Chaetodermella), most of which have been demonstrated to produce a brownrot mode of wood decay and are found preferentially on coniferous substrates. Multiple phylogenetic studies have included taxa of Gloeophyllales, but none have sampled the order thoroughly, and so far only ribosomal RNA genes have been used. Consequently the limits and higher level placement of the Gloeophyllales are obscure. We obtained sequence data for three protein-coding genes (rpb2, atp6, tef1) and three rRNA regions (nuc-ssu, nuc-lsu, 5.8S) in 19 species of Gloeophyllales representing seven genera and analyzed them together with a diverse set of Agaricomycotina, emphasizing Polyporales. Boreostereum, which is suspected to produce a white rot, is the sister group of the rest of the Gloeophyllales, all of which produce a brown rot. Gloeophyllum contains at least two independent clades, one of which might correspond to the genus Osmoporus. White rot and resupinate fruiting bodies appear to be plesiomorphic in Gloeophyllales. Relaxed molecular clock analyses suggest that the Gloeophyllales arose in the Cretaceous, after the origin of Pinaceae. © 2011 by The Mycological Society of America.

Publication Title

Mycologia

Publication Date

5-2011

Volume

103

Issue

3

First Page

510

Last Page

524

ISSN

0027-5514

DOI

10.3852/10-209

Keywords

Agaricomycotina, brown rot, systematics, taxonomy, wood decay

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