Albu Sebastian, Toome Merje, Aime M Catherine
Department of Plant Pathology and Crop Physiology, Louisiana State University Agricultural Center, Baton Rouge, Louisiana 70803
Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana 47907.
Mycologia. 2015 Nov-Dec;107(6):1193-204. doi: 10.3852/14-260. Epub 2015 Aug 21.
Numerous strains of a novel yeast were isolated in Louisiana, USA, from the leaves of several palustrine plants, most frequently from the invasive aquatic ferns Salvinia minima and S. molesta. This fungus produced fast-growing colonies that were grayish violet to dark blue in culture and rapidly reproduced via production of copious ballistoconidia that germinated to form pseudohyphae. Colonies produced many two-celled yeasts that were distinctly hourglass-or peanut-shaped, and occurred singly or in chains. Phylogenetic analyses of translation elongation factor 1-α, β-tubulin and the nuc rDNA regions encompassing 28S D1-D2 domains, 18S and the internal transcribed spacers 1 and 2, including 5.8S, indicate this fungus is a member of Ustilaginomycetes but holds an isolated position, distinct from the two currently recognized orders, Ustilaginales and Urocystales. Here we describe Violaceomycetales ord. nov., Violaceomycetaceae fam. nov. and Violaceomyces palustris gen. et sp. nov. for this unusual fungus.
在美国路易斯安那州，从几种沼生植物的叶子中分离出了许多新型酵母菌株，其中最常见的是从入侵性水生蕨类植物小槐叶萍和南美槐叶萍中分离得到。这种真菌形成生长迅速的菌落，在培养物中呈灰紫色至深蓝色，并通过产生大量弹射孢子快速繁殖，这些孢子萌发形成假菌丝。菌落产生许多两细胞酵母，明显呈沙漏形或花生形，单个或成链状出现。对翻译延伸因子1-α、β-微管蛋白以及包含28S D1-D2结构域、18S以及包括5.8S的内部转录间隔区1和2的核rDNA区域进行系统发育分析，表明这种真菌是黑粉菌纲的成员，但处于一个孤立的位置，与目前公认的两个目——黑粉菌目和腥黑粉菌目不同。在此，我们为这种不寻常的真菌描述了新目——紫孢酵母目、新科——紫孢酵母科和新属新种——沼生紫孢酵母。
