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Comparative Study
, 109 (Pt 5), 525-44

The Systematic Relevance of Conidiogenesis Modes in the Gilled Agaricales

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Comparative Study

The Systematic Relevance of Conidiogenesis Modes in the Gilled Agaricales

Grit Walther et al. Mycol Res.

Abstract

Dikaryotic and haploid mycelia of more than 150 gilled species of euagarics were studied morphologically and by molecular phylogenetic methods. The morphological investigations revealed anamorphs in more than 90 species that were often specific at the genus or family level. Thallic conidiogenesis dominated and varied from fragmentation of normally branched hyphae to the formation of differentiated sympodially branched conidiophores. Secession modes, coiling of the conidiogenous hyphae or the swelling of the conidia were additional distinguishing features. Phylogenetic analysis of the D1-D3 domains of the nuclear gene for the ribosomal large subunit using a Bayesian Markov chain Monte Carlo approach resulted in several well-supported groups that are consistent with anamorph morphology. These results indicate that the anamorphs provide valuable characters for a natural classification of the Agaricales.

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