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首页> 外文期刊>Mycologia >Differentiation of species of Elsinoe associated with scab disease ofProteaceae based on morphology, symptomatology, and ITS sequence phylogeny
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Differentiation of species of Elsinoe associated with scab disease ofProteaceae based on morphology, symptomatology, and ITS sequence phylogeny

机译：基于形态学，症状学和ITS序列系统发育的与Proteaceae sc疮相关的Elsinoe物种的区分

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摘要

Scab disease of Proteaceae, which was initially observed on Leucospermum in South Africa in 1981, has subsequently been reported on this host from Australia and Hawaii. The disease, commonly known as corky bark or scab, is associated with severe losses of commercial plantings of Leucospermum in South Africa, and has also been collected from species of Leucadendron, Protea and Serruria in South Africa, from Banksia, Leucadendron, Mimetes, Protea and Serruria in Australia, and from Leucospermum and Protea in California and Zimbabwe. The causal agent was determined to be a species of Elsinoe which has not been formally described. The aim of the present study was to elucidate the taxonomy of the species of Elsinoe associated with scab disease of Proteaceae in these countries. Morphology, symptomatology and DNA sequence analysis of the 5.8S rDNA gene and its flanking ITS1 and ITS2 regions were used. Anamorph and teleomorph characteristics of isolates from Leucospermum, Protea and Banksia suggest that there are at least four distinct species involved. These findings are strongly supported by the phylogenetic tree inferred from DNA sequence data. Furthermore, these results also show that the Elsinoe isolates from Leucadendron, Leucospermum and Serruria in South Africa and Australia, and the isolates from Leucospermum in California and Zimbabwe are representative of the same species.
机译：Proteaceae的ab疮病最初是在1981年在南非的Leucospermum上观察到的，随后在澳大利亚和夏威夷的该寄主中得到了报道。该病通常被称为软木树皮或结ab，与南非商业上的白精的严重损失有关，并且还从南非的Leucadendron，Protea和Serruria物种，Banksia，Leucadendron，Mimetes，Protea的物种中收集到。澳大利亚的Serruria以及加利福尼亚州和津巴布韦的Leucospermum和Protea。确定该病原体是尚未正式描述的Elsinoe物种。本研究的目的是阐明在这些国家中与Proteaceae sc疮相关的Elsinoe物种的分类。使用了5.8S rDNA基因及其ITS1和ITS2侧翼的形态，症状和DNA序列分析。来自白僵菌，普罗梯亚木和山龙眼的分离株的无性型和异形体特征表明至少涉及四个不同的物种。从DNA序列数据推断出的系统发育树强烈支持这些发现。此外，这些结果还表明，来自南非和澳大利亚的白花杜鹃，白皮菊和Serruria的Elsinoe分离株，以及在加利福尼亚和津巴布韦的白粉蝶的分离株是同一物种的代表。

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