China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China.
State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
J Eukaryot Microbiol. 2021 May;68(3):e12840. doi: 10.1111/jeu.12840. Epub 2021 Feb 9.
A novel genus and species within the order Glissmonadida (Cercozoa, Rhizaria), Saccharomycomorpha psychra n. g., n. sp., is described from lichen in the Ny-Ålesund region (High Arctic) and moss in the Fildes peninsula of King George Island (Maritime Antarctica). Cells were spherical and did not appear to present flagella in organic-rich Potato Dextrose Agar medium where they were able to feed osmotrophically. Molecular phylogenetic analyses based on 18S rRNA gene sequence demonstrated that Saccharomycomorpha psychra belong to "clade T" within the order Glissmonadida (Cercozoa, Rhizaria). All three investigated strains could grow at 4 °C and had an optimum growth temperature of 12 °C, 20 °C, and 20 °C, while a maximum growth temperature of 20 °C, 20 °C, and 25 °C, respectively. In conclusion, we established the phenotypic identity of "clade T," which until now was exclusively detected by environmental sequences, and erect a new family Saccharomycomorphidae for "clade T." Nomenclatural, morphological and ecological aspects of this novel species are discussed.
描述了一个新属和种，即 Glissmonadida 目（Cercozoa，Rhizaria）内的 Saccharomycomorpha psychra n. g., n. sp.，该属种来自 Ny-Ålesund 地区（高北极）的地衣和 King George 岛 Fildes 半岛的苔藓（海洋南极洲）。细胞呈球形，在富含有机物质的马铃薯葡萄糖琼脂培养基中似乎没有呈现鞭毛，在那里它们能够通过渗透营养方式进食。基于 18S rRNA 基因序列的分子系统发育分析表明，Saccharomycomorpha psychra 属于 Glissmonadida 目（Cercozoa，Rhizaria）内的“T 类群”。三个被研究的菌株都能在 4°C 下生长，最适生长温度分别为 12°C、20°C 和 20°C，而最大生长温度分别为 20°C、20°C 和 25°C。总之，我们建立了“T 类群”的表型特征，到目前为止，“T 类群”仅通过环境序列检测到，并且为“T 类群”建立了一个新的科 Saccharomycomorphidae。讨论了这个新物种的命名、形态和生态方面。
