Moniliellomycetes and Malasseziomycetes, two new classes in Ustilaginomycotina - PubMed (original) (raw)

Moniliellomycetes and Malasseziomycetes, two new classes in Ustilaginomycotina

Q-M Wang et al. Persoonia. 2014 Dec.

Abstract

Ustilaginomycotina (Basidiomycota, Fungi) has been reclassified recently based on multiple gene sequence analyses. However, the phylogenetic placement of two yeast-like genera Malassezia and Moniliella in the subphylum remains unclear. Phylogenetic analyses using different algorithms based on the sequences of six genes, including the small subunit (18S) ribosomal DNA (rDNA), the large subunit (26S) rDNA D1/D2 domains, the internal transcribed spacer regions (ITS 1 and 2) including 5.8S rDNA, the two subunits of RNA polymerase II (RPB1 and RPB2) and the translation elongation factor 1-α (EF1-α), were performed to address their phylogenetic positions. Our analyses indicated that Malassezia and Moniliella represented two deeply rooted lineages within Ustilaginomycotina and have a sister relationship to both Ustilaginomycetes and Exobasidiomycetes. Those clades are described here as new classes, namely Moniliellomycetes with order Moniliellales, family Moniliellaceae, and genus Moniliella; and Malasseziomycetes with order Malasseziales, family Malasseziaceae, and genus Malassezia. Phenotypic differences support this classification suggesting widely different life styles among the mainly plant pathogenic Ustilaginomycotina.

Keywords: fungi; molecular phylogeny; smuts; taxonomy; yeasts.

PubMed Disclaimer

Figures

Fig. 1

Fig. 1

Phylogenetic tree constructed using Bayesian analysis of the combined sequences of 18S rDNA, 26S rDNA D1/D2 domains, ITS regions (including 5.8S rDNA), RPB1, RPB2 and EF1-α depicting the phylogenetic placements of genera Moniliella and Malassezia within the Ustilaginomycotina. Branch lengths are scaled in terms of expected numbers of nucleotide substitutions per site. Bayesian posterior probabilities and bootstrap percentages from 1 000 replicates of maximum likelihood and maximum parsimony analyses are shown respectively from left to right on the deep and major branches resolved.

Fig. 2

Fig. 2

Phylogenetic trees based on datasets of rRNA genes including 18S, D1/D2 domains of 26S and ITS-5.8S (a, b and c); protein genes including RPB1, RPB2 and EF1-α (d, e and f) and the combined six genes (g, h and i) using Bayesian (a, d and g), maximum likelihood (b, e and h) and maximum parsimony (c, f and i) analyses, showing the major clades resolved within the Ustilaginomycotina. Bayesian posterior probabilities above 0.7 or bootstrap percentages over 50 % from 1 000 replicates are shown.

Similar articles

Cited by

References

    1. Baillon EH. 1889. Traité de Botanique Médicale Cryptogamique. Doin, Paris.
    1. Bauer R, Begerow D, Sampaio JP, Weiß M, Oberwinkler F. 2006. The simple-septate basidiomycetes: a synopsis. Mycological Progress 5: 41–66.
    1. Bauer R, Oberwinkler F, Vánky K. 1997. Ultrastructural markers and systematics in smut fungi and allied taxa. Canadian Journal of Botany 75: 1273–1314.
    1. Bauer R, Oberwinkler F, Piepenbring M, Berbee ML. 2001. Ustilaginomycetes. In: McLaughlin DJ, McLaughlin EG, Lemke PA. (eds), Systematics and evolution. The mycota VII part B: 57–83 Springer-Verlag, Berlin.
    1. Begerow D, Bauer R, Boekhout T. 2000. Phylogenetic placements of ustilaginomycetous anamorphs as deduced from nuclear LSU rDNA sequences. Mycology Research 104: 53–60.

LinkOut - more resources