Department of Applied and Industrial Mycology, CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT, Utrecht, The Netherlands.
Antonie Van Leeuwenhoek. 2012 Feb;101(2):403-21. doi: 10.1007/s10482-011-9647-1. Epub 2011 Oct 2.
The phylogenetic relationship among Geosmithia argillacea, Talaromyces emersonii, Talaromyces byssochlamydoides and other members of the Trichocomaceae was studied using partial RPB2 (RNA polymerase II gene, encoding the second largest protein subunit), Tsr1 (putative ribosome biogenesis protein) and Cct8 (putative chaperonin complex component TCP-1) gene sequences. The results showed that these species form a distinct clade within the Trichocomaceae and Trichocoma paradoxa is phylogenetically most closely related. Based on phenotypic and physiological characters and molecular data, we propose Rasamsonia gen. nov. to accommodate these species. This new genus is distinct from other genera of the Trichocomaceae in being thermotolerant or thermophilic and having conidiophores with distinctly rough walled stipes, olive-brown conidia and ascomata, if present, with a scanty covering. Species within the genus Rasamsonia were distinguished using a combination of phenotypic characters, extrolite patterns, ITS and partial calmodulin and β-tubulin sequences. Rasamsonia brevistipitata sp. nov. is described and five new combinations are proposed.
使用部分 RPB2（RNA 聚合酶 II 基因，编码第二大亚基）、Tsr1（假定核糖体生物发生蛋白）和 Cct8（假定伴侣蛋白复合物成分 TCP-1）基因序列研究了 Geosmithia argillacea、Talaromyces emersonii、Talaromyces byssochlamydoides 和其他 Trichocomaceae 成员之间的系统发育关系。结果表明，这些物种在 Trichocomaceae 中形成一个独特的分支，而 Trichocoma paradoxa 在系统发育上与它们最为密切相关。基于表型和生理特征以及分子数据，我们提出了 Rasamsonia 属。这个新属与 Trichocomaceae 中的其他属不同，它是耐热或嗜热的，并且具有具有明显粗糙壁梗的分生孢子梗、橄榄棕色的分生孢子和如果存在的话，具有稀疏覆盖物的子囊果。使用表型特征、外生代谢产物模式、ITS 以及部分钙调蛋白和β-微管蛋白序列的组合来区分 Rasamsonia 属内的物种。描述了 Rasamsonia brevistipitata sp. nov.，并提出了五个新的组合。
