Identification and taxonomic position of two mucoralean endoparasites of Hysterangium (Basidiomycota) based on molecular and morphological data

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• 作者：Hermann Voglmayr ; Heinz Clémençon
• 关键词：Molecular phylogeny ; Mucorales ; Mycoparasitism ; Zygospore wall
• 刊名：Mycological Progress
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：15
• 期：1
• 全文大小：11,847 KB
• 参考文献：Benny GL (2013) Zygomycetes. Mucor. http://​zygomycetes.​org/​index.​php?​id=​84 . Accessed 10 Nov 2015
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• 作者单位：Hermann Voglmayr (1)
  Heinz Clémençon (2)
  
  1. Division of Systematic and Evolutionary Botany, Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, A-1030, Wien, Austria
  2. Musée Botanique Cantonal, Avenue de Cour 14b, CH-1007, Lausanne, Switzerland
  
• 刊物主题：Plant Sciences; Ecology; Microbiology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1861-8952

文摘

Based on morphological and SSU-ITS-LSU sequence data, two new mucoralean endoparasites, Mucor lilianae and M. rudolphii, are described from basidiomes of Hysterangium spp. originating from North America and Europe, respectively. Although no cultures could be obtained and no sporangial state is known, morphology of the zygospores as well as DNA sequences confirm their placement in the genus Mucor. Both species are indistinguishable by nuSSU-ITS-LSU rDNA sequence data, but the size and morphology of the zygospores of both species are highly distinct, justifying their status as vicariant distinct species. Ontogeny and morphology of zygospores are described and illustrated by detailed light and scanning electron microscope investigations. Zygospore wall consists of two separable layers, a dark brown, warty outer layer and a hyaline inner layer with parallel ridges showing fingerprint-like patterns. Zygospore morphology fits the genus Mucor, apart from the apposed suspensors which are exceptional for the genus. Within the genus Mucor, the two new species are remarkable and unique in their highly specialised ecological niche as endoparasites of superficially intact hypogeous basidiomes of Hysterangium spp., which is much in contrast to other mucoralean necrotrophic parasites of epigeous basidiomes which effect rapid decay of their host.