Fehrer J, Réblová M, Bambasová V, Vohník M
Institute of Botany, Czech Academy of Sciences, 252 43 Průhonice, Czech Republic.
Department of Plant Experimental Biology, Faculty of Science, Charles University, 128 44 Prague, Czech Republic.
Stud Mycol. 2018 Oct 11;92:195-225. doi: 10.1016/j.simyco.2018.10.004. eCollection 2019 Mar.
Data mining for a phylogenetic study including the prominent ericoid mycorrhizal fungus revealed nearly identical ITS sequences of the bryophilous suggesting they are conspecific. Additional genetic markers and a broader taxonomic sampling furthermore suggested that the sexual and the asexual may be congeneric. In order to further elucidate these issues, type strains of all species traditionally treated as members of the aggregate (REA) and related taxa were subjected to phylogenetic analyses based on ITS, nrLSU, mtSSU, and 2 markers to produce comparable datasets while an re-synthesis experiment was conducted to examine the root-symbiotic potential of in the . Phylogenetic evidence demonstrates that sterile root-associated , sexual and , based on , are indeed congeneric. To this monophylum also belongs the phialidic dematiaceous hyphomycetes and . We provide a taxonomic revision of the REA; and are reduced to synonymy under . , typified by , an asexual morph of which is a core member of , is also transferred to the synonymy of the latter genus. is introduced as a new root-symbiotic species from Central Europe. and are confirmed conspecific, and four new combinations in are proposed. Based on phylogenetic analyses, some sexually reproducing species can be attributed to their asexual counterparts for the first time whereas the majority is so far known only in the sexual or asexual state. sporulating is reported for the first time. Surprisingly, the mycological and mycorrhizal sides of the same coin have never been formally associated, mainly because the sexual and asexual morphs of these fungi have been studied in isolation by different research communities. Evaluating all these aspects allowed us to stabilize the taxonomy of a widespread and ecologically well-studied group of root-associated fungi and to link their various life-styles including saprobes, bryophilous fungi, root endophytes as well as fungi forming ericoid mycorrhizae and ectomycorrhizae.
一项包括著名的石楠状菌根真菌在内的系统发育研究的数据挖掘显示，嗜苔藓类的内转录间隔区（ITS）序列几乎相同，这表明它们是同种的。此外，额外的遗传标记和更广泛的分类采样表明，有性型和无性型可能是同属的。为了进一步阐明这些问题，对所有传统上被视为聚合体（REA）成员的物种以及相关分类群的模式菌株进行了基于ITS、nrLSU、mtSSU和两个标记的系统发育分析，以生成可比数据集，同时进行了再合成实验，以检验在[具体环境]中[真菌名称]的根共生潜力。系统发育证据表明，基于[具体依据]，无菌的根相关真菌、有性型[真菌名称]和[真菌名称]确实是同属的。这个单系类群还包括瓶梗状暗梗丝孢菌[真菌名称]和[真菌名称]。我们对REA进行了分类修订；[真菌名称]和[真菌名称]被归为[真菌名称]的同义词。以[真菌名称]为模式的[真菌名称]，它是[真菌名称]的无性形态，也是[真菌名称]的核心成员，也被归为后一个属的同义词。[真菌名称]被作为一种来自中欧的新的根共生物种引入。[真菌名称]和[真菌名称]被确认为同种，并提出了[真菌名称]属中的四个新组合。基于系统发育分析，一些有性繁殖物种首次可以归为其无性对应物，而大多数物种目前仅在有性或无性状态下为人所知。首次报道了[真菌名称]产孢情况。令人惊讶的是，同一类真菌的真菌学和菌根方面从未正式关联过，主要是因为这些真菌的有性和无性形态一直由不同的研究群体分别进行研究。评估所有这些方面使我们能够稳定一个广泛且在生态方面得到充分研究的根相关真菌类群的分类，并将它们的各种生活方式联系起来，包括腐生菌、嗜苔藓真菌、根内生菌以及形成石楠状菌根和外生菌根的真菌。
