Childress Mary K, Dragone Nicholas B, Young Benjamin D, Adams Byron J, Fierer Noah, Quandt C Alisha
Department of Ecology and Evolutionary Biology, University of Colorado Boulder, Boulder, CO, USA.
Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA.
IMA Fungus. 2025 Mar 21;16:e142219. doi: 10.3897/imafungus.16.e142219. eCollection 2025.
The genus includes several species frequently isolated from extreme environments worldwide, including cold environments such as Antarctica. This study describes three new species of - , , and -isolated from Antarctic soils. These species represent the first taxa to be formally described from Antarctic soil samples, expanding our understanding of fungal biodiversity in this extreme environment. Microscopic descriptions of asexual structures from living cultures, along with measurements of cultural characteristics and growth on various media types at different temperatures, identify three distinct new species. In addition, phylogenetic analyses based on five gene regions (ITS, LSU, MCM7, RPB2, TEF1) and whole-genome proteomes place these new species within three distinct previously described clades: in clade K, in clade Q, and in clade B. These results provide further evidence of the extensive undescribed diversity of in high-latitude soils. This study contributes to the growing body of knowledge on Antarctic mycology and the broader ecology of psychrophilic and psychrotolerant fungi.
该属包括几个经常从世界各地极端环境中分离出来的物种，包括南极洲等寒冷环境。本研究描述了从南极土壤中分离出的-、-和-三个新物种。这些物种代表了首批从南极土壤样本中正式描述的类群，扩展了我们对这种极端环境中真菌生物多样性的认识。对活体培养物无性结构的显微镜描述，以及对不同温度下各种培养基类型上的培养特征和生长情况的测量，确定了三个不同的新物种。此外，基于五个基因区域（ITS、LSU、MCM7、RPB2、TEF1）和全基因组蛋白质组的系统发育分析将这些新物种置于三个不同的先前描述的进化枝中：进化枝K中的，进化枝Q中的，以及进化枝B中的。这些结果进一步证明了高纬度土壤中广泛存在未描述的多样性。本研究为南极真菌学以及嗜冷和耐冷真菌更广泛的生态学方面不断增长的知识体系做出了贡献。
