Fungal diversity in deep-sea sediments - the presence of novel fungal groups
Fungal diversity in deep-sea sediments - the presence of novel fungal groups
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DOI：
10.1016/j.funeco.2010.01.002
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发表时间：
2010-11-01
期刊：
影响因子：
2.9
通讯作者：
Horikoshi, Koki
中科院分区：
文献类型：
--
作者：
Nagano, Yuriko;Nagahama, Takahiko;Horikoshi, Koki
我们调查了10个不同的深海沉积物样品中的真菌群落的多样性PCR介导的内转录间隔区（ITS）的rRNA基因克隆分析。虽然一些扩增的序列被鉴定为常见的陆生真菌物种，但大多数是与先前在公共数据库中鉴定的真菌ITS序列不密切相关的新序列。系统发育分析还表明，子囊菌门内一组主要的深海真菌类型的新的系统发育关系。这些沉积物类型在全球深海沉积物中可能分布广泛。另一个新的壶菌类型被放置在深层分支壶菌门与Rozella属。作为最接近的生物体。这项研究揭示了在深海沉积生境的不同深度和地点可能存在以前未知的真菌成分。有人建议，深海环境的栖息地托管以前未开发的真菌，这可能会提供关键的见解真菌的早期进化及其生态和生理意义。(C)2010 Elsevier Ltd和英国真菌学会。All rights reserved.
We investigated the diversity of fungal communities in 10 different deep-sea sediment samples by PCR-mediated internal transcribed spacer (ITS) regions of rRNA gene clone analysis. Although some of the amplified sequences were identified as common terrestrial fungal species, the majority were novel sequences that were not closely related to previously identified fungal ITS sequences in public databases. Phylogenetic analysis also suggested the novel phylogenetic affiliation of a group of predominant deep-sea phylotypes within the phylum Ascomycota. These phylotypes may be distributed widely in global deep-sea sediments. Another novel phylotype was placed in deep branches within the phylum Chytridiomycota with Rozella spp. as the closest related organisms. This study revealed the possible existence of previously unknown fungal components in various depths and sites of deep-sea sedimentary habitats. It is suggested that deep-sea environments are habitats hosting previously unexplored fungi, which may provide key insights into the early evolution of fungi and their ecological and physiological significance. (C) 2010 Elsevier Ltd and The British Mycological Society. All rights reserved.