Phylogenetic analysis of strains originally assigned to Bullera variabilis: descriptions of Bullera pseudohuiaensis sp. nov., Bullera komagatae sp. nov. and Bullera pseudoschimicola sp. nov (original) (raw)
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2014
Volvariella volvacea, (Bull.exFr.) Sing the Chinese straw mushroom, is an important edible fungus of the tropics and subtropics and is the third most popular cultivated mushroom in the world, which is well known for its pleasant flavour and taste. More than 100 species, sub species and varieties belonging to Volvariella have been described from throughout the world. Shaffer, 1957 described 23 species of Volvariella based on gross morphology, pink spore, free lamellae and stipe with no annulus at the base by the volva (Singh et al. 2003). In case of higher basidiomycetes, morphology and microscopic characters of the basidiocarp are still on the basis of their identification and classification. Nevertheless, highly polymorphic basidiocarp morphology and quite homogenous microscopic characters are insufficient to reveal intraspecific variations. Moreover it is not feasible to ISSN: 2319-7706 Volume 3 Number 5 (2014) pp. 487-492 http://www.ijcmas.com
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Emendation of the basidiomycetous yeast genus Kondoa and the description of Kondoa aeria sp. nov
Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology, 2000
The genus Kondoa Y. Yamada, Nakagawa & Banno was erected to accommodate a single taxon, K. malvinella (Fell & Hunter) Y. Yamada, Nakagawa & Banno, which was transferred from the teliospore-forming genus Rhodosporidium Banno based on pronounced differences in the 5S and 26S ribosomal RNA (rRNA) nucleotide sequences to R. toruloides Banno. In contrast with the original description, reinvestigation of K. malvinella revealed the formation of transversely septate (auricularioid) basidia that did not arise on teliospores, but formed directly on the dikaryotic mycelium. The four-celled basidia developed sterigmata on which forcibly discharged asymmetric basidiospores (ballistospores) were produced. Additionally, a new taxon emerged from the study of recent isolates, for which the name K. aeria sp. nov. is proposed. This new species produced two-celled auricularioid basidia on hyphae with incomplete clamp connections. Ballistospores arose on the basidia at the tip of sterigmata and, after ejection, germinated by budding. These observations led us to present an emended diagnosis for the genus Kondoa. Analysis of the sequence data from the D1/D2 region of the 26S rRNA gene showed a very close resemblance between K. aeria and K. malvinella in a cluster that also contained several Bensingtonia species. Taxa in this cluster share specific physiological traits and produce characteristic pinkish-cream to mauve colonies; in contrast, formation of ballistoconidia is only observed in the Bensingtonia species. Sequence data supported placement of K. malvinella and K. aeria in the `Agaricostilbum clade' of the Urediniomycetes.
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Bullera vrieseae sp. nov., a tremellaceous yeast species isolated from bromeliads
International Journal of Systematic and Evolutionary Microbiology, 2015
Two independent surveys of yeasts associated with different bromeliads in different Brazilian regions led to the proposal of a novel yeast species,Bullera vrieseaesp. nov., belonging to the Tremellales clade (Agaricomycotina, Basidiomycota). Analysis of the sequences in the internal transcribed spacer (ITS) region and D1/D2 domain of the LSU rRNA gene suggested affinity to a phylogenetic lineage that includesBullera miyagianaandBullera sakaeratica. Six isolates of the novel species were obtained from different bromeliads and regions in Brazil. Sequence analysis of the D1/D2 domains of the large subunit of the rRNA gene showed that the novel species differs fromB.miyagianaandB. sakaeraticaby 85 and 64 nt substitutions, respectively and by more than 75 nt substitutions in the ITS region. Phenotypically,Bullera vrieseaesp. nov. can be distinguished from both species based on the assimilation ofmeso-erythritol, which was negative forB. vrieseaesp. nov. but positive for the others, assim...
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Bullera vrieseae sp. nov., a new tremellaceous yeast species isolated from bromeliads
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY, 2015
Two independent surveys of yeasts associated with different bromeliads in different Brazilian regions led to the proposal of a novel yeast species, Bullera vrieseae sp. nov., belonging to the Tremellales clade (Agaricomycotina, Basidiomycota). Analysis of the sequences in the internal transcribed spacer (ITS) region and D1/D2 domain of the LSU rRNA gene suggested affinity to a phylogenetic lineage that includes Bullera miyagiana and Bullera sakaeratica. Six isolates of the novel species were obtained from different bromeliads and regions in Brazil. Sequence analysis of the D1/D2 domains of the large subunit of the rRNA gene showed that the novel species differs from B. miyagiana and B. sakaeratica by 85 and 64 nt substitutions, respectively and by more than 75 nt substitutions in the ITS region. Phenotypically, Bullera vrieseae sp. nov. can be distinguished from both species based on the assimilation of meso-erythritol, which was negative for B. vrieseae sp. nov. but positive for th...
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