Phytopathology. 2006 Apr;96(4):369-77. doi: 10.1094/PHYTO-96-0369.
ABSTRACT Eutypa dieback is a vascular disease of several cultivated crops and trees worldwide. The attribution of the name to the agent responsible for branch dieback is ambiguous. Pathogenicity of Eutypa sp. first was reported on apricot and the causal agent was named E. armeniacae. However, no morphological differences were reported with the previously described E. lata, and some authors considered both species synonymous. Others regarded them as distinct species on the basis of pathogenesis and molecular analysis. We further investigated the relatedness of both species by phylogenetic analyses of the internal transcribed spacer region and beta-tubulin gene. These analyses included several other taxa placed in the same family (Diatrypaceae), and yielded three groups. The isolates referred to as E. lata in previous work clustered with Diatrype stigma in one group. Isolates of E. armeniacae and E. lata clustered in a second group, supporting the synonymy of these species. The third group included other Eutypa spp. supporting the polyphyletic origin of this genus. Measurements of conidia length and secondary metabolite production of isolates supported the phylogenetic analyses. Secondary metabolites appeared to be a synapomorphic character shared by several taxa including E. lata, E. armeniacae, E. laevata, and E. petrakii var. petrakii.
摘要 欧洲栓疫病是一种世界性的栽培作物和树木的维管束病害。将该病名赋予导致枝条枯死的病原体是模棱两可的。最初在杏树上报道了胶孢炭疽菌引起欧洲栓疫病，该病原体被命名为 E. armeniacae。然而，与先前描述的 E. lata 没有报道形态差异，一些作者认为这两个种是同义的。另一些作者则根据致病性和分子分析将它们视为不同的种。我们通过对内部转录间隔区和β-微管蛋白基因的系统发育分析，进一步研究了这两个种的亲缘关系。这些分析包括其他几个科（肉座菌科）的分类群，产生了三个组。以前工作中被称为 E. lata 的分离物与 Diatrype stigma 在一组中聚类。E. armeniacae 和 E. lata 的分离物在第二组中聚类，支持这些种的同义。第三组包括其他欧洲栓菌种，支持该属的多系起源。分离物的分生孢子长度和次生代谢产物的测量结果支持系统发育分析。次生代谢产物似乎是包括 E. lata、E. armeniacae、E. laevata 和 E. petrakii var. petrakii 在内的几个分类群的共同特征。
