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首页> 外文期刊>Mycologia >Kohninia linnaeicola, a new genus and species of the Sclerotiniaceae pathogenic to Linnaea borealis
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Kohninia linnaeicola, a new genus and species of the Sclerotiniaceae pathogenic to Linnaea borealis

机译：Kohninia linnaeicola，一种对山毛榉木有致病性的菌核科的新属和种

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摘要

A new genus and species is described to accommodate a newly discovered fungus pathogenic to Linnaea borealis. The fungus forms true sclerotia on stems and leaves of its host and apothecia arise singly or gregariously on the Surface of ripe sclerotia. The new fungus was collected together with a stromatic conidiomal fungus that occurred on the same host. A putative teleomorph-anamorph connection of the observed taxa was ruled out by sequence comparison of the unclear ribosomal internal transcribed spacer DNA sequences (ITS rDNA). Based on morphology and pathogenicity, the new fungus belongs in the family Sclerotiniaceae, Helotiales, Ascomycota. A phylogenetic analysis of ITS rDNA sequences from 26 taxa of the family Sclerotiniaceae was performed to conclude on the systematic position of the new fungus. The small tuberoid sclerotia, brownish subsessile to substipitate apothecia, four-spored asci, ellipsoid to isthmoid ascospores, inability to grow on PDA Culture media and a number of ITS rDNA sequence autapomorphies characterize and distinguish the fungus from other taxa of the Sclerotiniaceae.
机译：描述了一种新的属和种，以容纳新发现的对菩提树有致病性的真菌。真菌在其寄主的茎和叶上形成真正的菌核，而在成熟菌核的表面上单性或合生性地出现了厌食症。收集新真菌以及在同一宿主中发生的间质分生孢子真菌。通过不清楚的核糖体内部转录间隔区DNA序列（ITS rDNA）的序列比较，排除了观察到的分类单元的推定的远胚体-变形体连接。基于形态和致病性，新真菌属于菌核科，Heletiales，子囊菌科。对来自菌核科的26个分类群的ITS rDNA序列进行系统进化分析，以推断新真菌的系统位置。小的管状菌核，褐色的近无柄的顶生的无营养，四孢子的asci，椭球的到类鳞茎的孢子孢子，不能在PDA培养基上生长，并且许多ITS rDNA序列的异形性将真菌与菌核菌科的其他类群区别开来。

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