Sistotrema subconfluens sp. nov. (Cantharellales, Basidiomycota) from Changbaishan Nature Reserve, northeastern China
Sistotrema subconfluens sp. nov. (Cantharellales, Basidiomycota) from Changbaishan Nature Reserve, northeastern China
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DOI：
10.1016/j.myc.2012.08.005
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发表时间：
2013-05
期刊：
影响因子：
1.4
通讯作者：
Li-Wei Zhou;W. Qin
中科院分区：
文献类型：
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作者：
Li-Wei Zhou;W. Qin
以S. confluens为代表的Sistotrema，其主要特征是其壶形担子，大部分具有6e8 sterigmata，以及单丝菌丝系统、富含油脂的菌丝和光滑的担子孢子。该属的物种具有不同的子实座构造和担子孢子形状。 2011年在一次实地考察中，在中国东北长白山自然保护区采集到了两个壶形担子标本。经过仔细的形态学和分子研究，它们被描述和说明为一个新物种，S. subconfluens。除了壶形担子外，该新种与 S. conluens 具有陆生习性、带柄担子果和孔状子实座。这些特征使这两个物种不同于所有其他在木材上具有反旋担子果的 Sistotrema 物种。 Sistotrema subconfluens 与该类型的不同之处在于具有较大的担子果、较短的担子孢子和一致的孔状子实座。从核大亚基 rDNA 推断的系统发育中，这两个物种是姊妹类群，但明显分开。两个物种之间的内部转录间隔序列差异为3.6%。© 2012 日本真菌学会。由 Elsevier BV 出版 保留所有权利。
Sistotrema, typified by S. confluens, is characterized mainly by its urniform basidia mostly with 6e8 sterigmata as well as by a monomitic hyphal system, oil rich hyphae and smooth basidiospores. The species of this genus have various hymenophore configurations and basidiospore shapes. During a field trip in 2011, two specimens with urniform basidia were collected from Changbaishan Nature Reserve, northeastern China. After careful morphological and molecular studies, they are described and illustrated here as a new species, S. subconfluens. The new species shares a terrestrial habit, stipitate basidiocarps and poroid hymenophores with S. confluens, besides urniform basidia. These characters make the two species different from all other species of Sistotrema with resupinate basidiocarps on wood. Sistotrema subconfluens differs from the type by having larger basidiocarps, shorter basidiospores and consistent poroid hymenophores. In phylogeny inferred from nuclear large subunit rDNA, the two species were sister taxa but clearly separated. The difference of internal transcribed spacer sequences between the two species was 3.6%.© 2012 The Mycological Society of Japan. Published by Elsevier BV All rights reserved.