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Abstract
AbstractYeasts, usually defined as unicellular fungi, occur in various fungal lineages. Hence, they are not a taxonomic unit, but rather represent a fungal lifestyle shared by several unrelated lineages. Although the discovery of new yeast species occurs at an increasing speed, at the current rate it will likely take hundreds of years, if ever, before they will all be documented. Many parts of the earth, including many threatened habitats, remain unsampled for yeasts and many others are only superficially studied. Cold habitats, such as glaciers, are home to a specific community of cold-adapted yeasts, and, hence, there is some urgency to study such environments at locations where they might disappear soon due to anthropogenic climate change. The same is true for yeast communities in various natural forests that are impacted by deforestation and forest conversion. Many countries of the so-called Global South have not been sampled for yeasts, despite their economic promise. However, extensive research activity in Asia, especially China, has yielded many taxonomic novelties. Comparative genomics studies have demonstrated the presence of yeast species with a hybrid origin, many of them isolated from clinical or industrial environments. DNA-metabarcoding studies have demonstrated the prevalence, and in some cases dominance, of yeast species in soils and marine waters worldwide, including some surprising distributions, such as the unexpected and likely common presence of Malassezia yeasts in marine habitats.
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Wang GS, Zhou Y, Xue L, Li AH, Wangmu, Wang QM. Teunia rosae sp. nov. and Teunia rudbeckiae sp. nov. (Cryptococcaceae, Tremellales), two novel basidiomycetous yeast species isolated from flowers. Int J Syst Evol Microbiol 2020; 70:5394-5400. [PMID: 33275546 DOI: 10.1099/ijsem.0.004423] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Three yeast strains isolated from three flower samples were identified as representing two novel species of Teunia based on molecular phylogenetic analysis and phenotypic comparisons. Strains 12A8 and 21S4 with pink cream colonies and subglobose to globose cells had identical sequences in the ITS and LSU D1/D2 regions, which differed from strain X54 with cream colonies and ovoid to ellipsoidal cells by 6 nt substitutions (1 %) and 9 nt mismatches (1.5 %) in the D1/D2 domains and ITS region, respectively. They could also be distinguished from each other in assimilation of glucitol and salicin, growth at 28 °C and cell fibrillar appendages under scanning electron microscopy. The three strains differed from known species of Teunia by more than 8 nt (1.3 %) and 30 nt (5 %) in the D1/D2 domains and ITS region, respectively. Therefore, the names Teunia rudbeckiae sp. nov. (Holotype CGMCC 2.5840, Mycobank MB 835892) and Teunia rosae sp. nov. (Holotype CGMCC 2.5830, MycoBank MB 835891) are proposed to accommodate strain X54, and strains 12A8 and 21S4, respectively.
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Affiliation(s)
- Gui-Shuang Wang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Science, Beijing 100101, PR China.,Tibet Agricultural and Animal Husbandry University, Nyingchi 860000, Tibet, PR China.,Key Laboratory of Microbial Diversity Research and Application of Hebei Province, College of Life Sciences, Institute of Life Sciences and Green Development, Hebei University, Baoding 071002, Hebei, PR China
| | - Yu Zhou
- School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, PR China
| | - Lu Xue
- School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, PR China
| | - Ai-Hua Li
- China General Microbiological Culture Collection Center and State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Wangmu
- Tibet Agricultural and Animal Husbandry University, Nyingchi 860000, Tibet, PR China
| | - Qi-Ming Wang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Science, Beijing 100101, PR China.,Key Laboratory of Microbial Diversity Research and Application of Hebei Province, College of Life Sciences, Institute of Life Sciences and Green Development, Hebei University, Baoding 071002, Hebei, PR China
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