Aspergillus section Candidi historically included a single white-spored species, A. candidus. Later studies clarified that other species may also belong to this section. In this study, we examined isolates of species tentatively assigned to section Candidi using a polyphasic approach. The characters examined include sequence analysis of partial beta-tubulin, calmodulin and ITS sequences of the isolates, morphological and physiological tests, and examination of the extrolite profiles. Our data indicate that the revised section Candidi includes 4 species: A. candidus, A. campestris, A. taichungensis and A. tritici. This is strongly supported by all the morphological characteristics that are characteristic of section Candidi: slow growing colonies with globose conidial heads having white to yellowish conidia, conidiophores smooth, small conidiophores common, metulae present and covering the entire vesicle, some large Aspergillus heads with large metulae, presence of diminutive heads in all species, conidia smooth or nearly so with a subglobose to ovoid shape, and the presence of sclerotia in three species (A. candidus, A. taichungensis and A. tritici). Aspergillus tritici has been suggested to be the synonym of A. candidus previously, however, sequence data indicate that this is a valid species and includes isolates came from soil, wheat grain, flour and drums from India, Ghana, Sweden, The Netherlands and Hungary, making it a relatively widespread species. All species produce terphenyllins and candidusins and three species (A. candidus, A. campestris and A. tritici) produce chlorflavonins. Xanthoascins have only been found in A. candidus. Each of the species in section Candidi produce several other species specific extrolites, and none of these have been found in any other Aspergillus species. A. candidus has often been listed as a human pathogenic species, but this is unlikely as this species cannot grow at 37 degrees C. The pathogenic species may be A. tritici or white mutants of Aspergillus flavus.

中文翻译：

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基于分子、形态和生理数据的念珠菌曲霉多相分类学。

曲霉属部分 Candidi 历史上包括一个单一的白色孢子物种，A. candidus。后来的研究澄清了其他物种也可能属于这一部分。在这项研究中，我们使用多相方法检查了暂时分配到 Candidi 部分的物种分离株。检查的特征包括分离株的部分β-微管蛋白、钙调蛋白和ITS 序列的序列分析、形态学和生理学测试以及extrolite 谱的检查。我们的数据表明，修订后的 Candidi 包括 4 个物种：A. candidus、A. campestris、A. taichungensis 和 A. tritici。这是 Candidi 部分特征的所有形态特征的有力支持：缓慢生长的菌落，球状分生孢子头具有白色至淡黄色的分生孢子，分生孢子梗光滑，小分生孢子梗常见，分生孢子梗存在并覆盖整个囊泡，一些大曲霉头带有大的分生孢子，所有物种都存在小头，分生孢子光滑或几乎如此，呈近球形至卵球形，三个物种中存在菌核（A . candidus、A. taichungensis 和 A. tritici)。Aspergillus tritici 之前曾被认为是 A. candidus 的同义词，然而，序列数据表明这是一个有效的物种，包括来自印度、加纳、瑞典、荷兰和匈牙利的土壤、小麦籽粒、面粉和鼓的分离物，使其成为一个相对广泛的物种。所有物种都产生三联苯和念珠菌素，三个物种（A. candidus、A. campestris 和 A. tritici）产生氯黄酮。仅在 A. candidus 中发现了黄黄素。Candidi 部分中的每个物种都会产生几种其他物种特异性的分泌物，而这些都没有在任何其他曲霉属物种中发现。A. candidus 通常被列为人类致病物种，但这不太可能，因为该物种不能在 37 摄氏度下生长。致病物种可能是 A. tritici 或黄曲霉的白色突变体。