Taxonomy and phylogeny of Cryptocoryneum (Pleosporales, Dothideomycetes)
Taxonomy and phylogeny of Cryptocoryneum (Pleosporales, Dothideomycetes)
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DOI：
10.1007/s11557-016-1186-8
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发表时间：
2016-05-01
影响因子：
2.4
通讯作者：
Tanaka, Kazuaki
中科院分区：
文献类型：
--
作者：
Hashimoto, Akira;Matsumura, Misato;Tanaka, Kazuaki
根据形态观察和分子系统发育分析结果，对隐棒菌属的物种进行了分类学重新评估。利用核rDNA内转录间隔区（ITS）序列和翻译延伸因子1a基因（TEF1）的部分序列，对18个隐棒孢属（Cryptocoryneum）种（2个来自非洲，3个来自欧洲，13个来自日本）的分离株进行了遗传学分析。系统发育分析表明，隐棒孢属隐对C. fasciculatum，C. hysterioides和单孢圆酵母（Torula uniformis），并认为这3个种是同一种，C.歇斯底里症优先。虽然C. hysterioides一直被认为是C. condensatum，我们认为C. hysterioides是一个独特的物种内属。我们发现了几种形态上与C. Condensatum sensu lato，但可以根据分生孢子大小和分生孢子的数量以及分生孢子隔膜来区分，这些特征似乎对隐棒孢属内的物种划分有重要意义。共发现7个新种，即C. akitaense、赤眼蜂C. brevicondensatum、短颈弯角藻C. congregatum，密花隐翅虫C. japonicum、日本刺蛾C. longcondensatum、长颈弯角藻C. paracondensatum和C.描述并示出了伪地震。提供了隐棒孢属的种检索表。
Species of Cryptocoryneum were taxonomically reassessed on the basis of morphological observations and the results of molecular phylogenetic analysis. Eighteen isolates of Cryptocoryneum species, namely two strains from Africa, three from Europe, and 13 from Japan, were phylogenetically analysed using sequences of nuclear rDNA internal transcribed spacers (ITS) and the partial sequence of the translation elongation factor 1a gene (TEF1). The phylogenetic analysis indicated that Cryptocoryneum species formed amonophyletic clade and were closely related to Lophiotrema (Lophiotremataceae) and Aquasubmersa (incertae sedis) in the Pleosporales (Dothideomycetes). We examined holotype specimens of C. fasciculatum, C. hysterioides, and Torula uniformis and concluded that these species are conspecific, with C. hysterioides having priority. Although C. hysterioides has long been regarded as a synonymof C. condensatum, we consider C. hysterioides to be a distinct species within the genus. We found several cryptic species that were morphologically similar to C. condensatum sensu lato, but that could be separated on the basis of conidial size andthenumber of conidialarms and conidial septa, characters that seem to be informative for species delimitation within Cryptocoryneum. A total of seven new species, namely C. akitaense, C. brevicondensatum, C. congregatum, C. japonicum, C. longicondensatum, C. paracondensatum, and C. pseudorilstonei, are described and illustrated. A key to species accepted in Cryptocoryneum is provided.