Ustilaginomycetes

Bauer, Robert; Begerow, Dominik; Oberwinkler, E.; Piepenbring, Meike; Berbee, Mary L.

doi:10.1007/978-3-662-10189-6_3

Cited by 55 publications

(72 citation statements)

References 68 publications

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“…The monophyly of this group has never been seriously questioned (Vánky 1985(Vánky , 1987Bauer et al 2001) and was further corroborated by LSU data (Begerow et al 1997(Begerow et al , 2000 and likewise by teliospore wall ultrastructure (Piepenbring et al 1998a(Piepenbring et al , 1998b(Piepenbring et al , 1998c. Moreover, the comparatively short branch lengths in the NJ topology indicate a low molecular diversity, hence corroborating the close relationship between the two genera.…”

Section: Discussionmentioning

confidence: 83%

Molecular phylogeny of Ustilago, Sporisorium, and related taxa based on combined analyses of rDNA sequences

Stoll

Begerow

Oberwinkler

2005

Mycological Research

102

135

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DNA sequence data from the internal transcribed spacer (ITS) region of the nuclear rDNA genes were used to determine a phylogenetic relationship between the graminicolous smut genera Ustilago and Sporisorium (Ustilaginales). Fifty-three members of both genera were analysed together with three related outgroup genera. Neighbor-joining and Bayesian inferences of phylogeny indicate the monophyly of a bipartite genus Sporisorium and the monophyly of a core Ustilago clade. Both methods confirm the recently published nomenclatural change of the cane smut Ustilago scitaminea to Sporisorium scitamineum and indicate a putative connection between Ustilago maydis and Sporisorium. Overall, the three clades resolved in our analyses are only weakly supported by morphological characters. Still, their preferences to parasitize certain subfamilies of Poaceae could be used to corroborate our results: all members of both Sporisorium groups occur exclusively on the grass subfamily Panicoideae. The core Ustilago group mainly infects the subfamilies Pooideae or Chloridoideae.Key words: basidiomycete systematics, ITS, molecular phylogeny, Bayesian analysis, Ustilaginomycetes, smut fungi.Résumé : Afin de déterminer la relation phylogénétique des genres Ustilago et Sporisorium (Ustilaginales), responsables du charbon chez les graminées, les auteurs ont utilisé les données de séquence de la région espaceur transcrit interne (ITS) des gènes nucléiques ADNr. Ils ont analysé 53 membres de ces genres, ainsi que trois genres apparentés. Les liens avec les voisins et l'inférence bayésienne de la phylogénie indiquent la monophylie d'un genre Sporisorium bipartite et la monophylie d'un clade Ustilago central. Les deux méthodes confirment le changement de nomenclature récemment publié faisant passer le charbon du roseau d'Ustilago scitaminea à Sporisorium scitamineum, et indiquent un lien possible entre l'Ustilago maydis et le genre Sporisorium. Dans l'ensemble, les trois clades résolus dans ces analyses ne sont que faiblement supportés par des caractères morphologiques. Tout de même, leurs préférences comme parasites de certaines familles de Poaceae pourraient être utilisées pour corroborer les résultats obtenus : tous les membres des deux groupes de Sporisorium se retrouvent exclusivement dans la sous-famille Panicoideae. Le groupe central Ustilago infecte les sous-familles Pooideae ou Chloridoideae.

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Section: Discussionmentioning

confidence: 83%

Molecular phylogeny of Ustilago, Sporisorium, and related taxa based on combined analyses of rDNA sequences

Stoll

Begerow

Oberwinkler

2005

Mycological Research

102

135

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“…Using histopathology of CFD samples from Palmyra Atoll and genetic sequencing of the associated fungus, we confirm a fungal infection of the CCA. While species-level identification was not possible, our phylogenetic analysis strongly suggests that the CFD fungus belongs to the subphylum Ustilaginomycetes, which consists of a large number of plant parasites, including strains of smut fungi [47]. Our methods, which allowed isolation of the fungus without an axenic culture, could be used to compare the fungus present in the Palmyra CFD lesions with fungi associated with suspected CFD lesions found on other reefs.…”

Section: Discussionmentioning

confidence: 98%

Ocean warming and acidification have complex interactive effects on the dynamics of a marine fungal disease

et al. 2014

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Diseases threaten the structure and function of marine ecosystems and are contributing to the global decline of coral reefs. We currently lack an understanding of how climate change stressors, such as ocean acidification (OA) and warming, may simultaneously affect coral reef disease dynamics, particularly diseases threatening key reef-building organisms, for example crustose coralline algae (CCA). Here, we use coralline fungal disease (CFD), a previously described CCA disease from the Pacific, to examine these simultaneous effects using both field observations and experimental manipulations. We identify the associated fungus as belonging to the subphylum Ustilaginomycetes and show linear lesion expansion rates on individual hosts can reach 6.5 mm per day. Further, we demonstrate for the first time, to our knowledge, that ocean-warming events could increase the frequency of CFD outbreaks on coral reefs, but that OA-induced lowering of pH may ameliorate outbreaks by slowing lesion expansion rates on individual hosts. Lowered pH may still reduce overall host survivorship, however, by reducing calcification and facilitating fungal bio-erosion. Such complex, interactive effects between simultaneous extrinsic environmental stressors on disease dynamics are important to consider if we are to accurately predict the response of coral reef communities to future climate change.

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“…Because there were no justifying data to exclude smuts, such as BUstomycota^, from Basidiomycota, rejected this proposal rigorously. The new data on smuts accumulated since then were summarised by Bauer et al (2001a) and accepted in following generalizing treatments (Hibbett et al 2007). Teliospore development, ultrastructure, liberation, and dispersal in Ustilaginales and Tilletiales as well as in Microbotryum, were studied in 120 species of 37 genera by Piepenbring et al (1998a-c).…”

Section: Ustilaginomycotina True Smut Fungimentioning

confidence: 99%

“…They were studied in our institute intensively. When maturing, the intracellulary grown smut spores are internally divided into four cells, each of them producing a germination hypha (Bauer et al 2001a). Using ultrastructural and molecular data, and Begerow et al (1997) classified the Entorrhizales as sister to the remaining smuts.…”

Section: Ustilaginomycotina True Smut Fungimentioning

confidence: 99%

Dr. Robert Bauer (1950-2014) in memoriam: botanist, mycologist, and electron microscopist

Oberwinkler

2015

Mycol Progress

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Ustilaginomycetes

Cited by 55 publications

References 68 publications

Molecular phylogeny of Ustilago, Sporisorium, and related taxa based on combined analyses of rDNA sequences

Molecular phylogeny of Ustilago, Sporisorium, and related taxa based on combined analyses of rDNA sequences

Ocean warming and acidification have complex interactive effects on the dynamics of a marine fungal disease

Dr. Robert Bauer (1950-2014) in memoriam: botanist, mycologist, and electron microscopist

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