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应怀疑专门病原体组中的广宿主范围物种——关于感染的案例研究。

Broad host range species in specialised pathogen groups should be treated with suspicion - a case study on infecting .

作者信息

Kruse J, Pia Tek M, Lutz M, Thines M

机构信息

Department of Biosciences, Institute of Ecology, Evolution and Diversity, Goethe University Frankfurt am Main, Max-von-Laue-Str. 9, D-60438 Frankfurt am Main, Germany.

Biodiversity and Climate Research Centre (BiK-F), Senckenberg Gesellschaft für Naturforschung, Senckenberganlage 25, D-60325 Frankfurt am Main, Germany.

出版信息

Persoonia. 2018 Dec;41:175-201. doi: 10.3767/persoonia.2018.41.09. Epub 2018 Jul 11.

DOI:10.3767/persoonia.2018.41.09
PMID:30728604
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6344810/
Abstract

Plant pathogenic smut fungi in the broader sense can be divided into the , which cause classical smut symptoms with masses of blackish spores being produced in a variety of angiosperms, and the , which are often less conspicuous, as many do not shed large amounts of blackish spores. The leaf-spot causing members of the genus (, ) belong to the latter group. Currently, 172 species that all infect eudicots are included in the genus. Vánky (2012) recognised five species on species of s.lat. Two have been reported only from s.lat, while three, , , , have been reported to have a broad host range, encompassing 30, 26, and 5 species of , respectively. This broad host range is in contrast to the generally high host specificity assumed for species of , indicating that they may represent complexes of specialised species. The aim of this study was to investigate on s.lat. using multigene phylogenies and morphological comparisons. Phylogenetic analyses on the basis of up to four loci (ITS, 2, 1, and ) showed a clustering of specimens according to host species. For some of these lineages, names not currently in use were available and reinstated. In addition, s.str. is neotypified. Six novel species are described in this study, namely, on , on , on , on subsp. (type host) and , on , and on . For all species diagnostic bases and morphological characteristics are provided. The results in this study once more highlight the importance of detailed re-investigation of broad host-range pathogens of otherwise specialised plant pathogen groups.

摘要

广义上的植物病原黑粉菌可分为两类,一类会引发典型的黑粉病症状,在多种被子植物中产生大量黑色孢子;另一类则通常不太明显,因为许多此类真菌不会释放大量黑色孢子。引起叶斑病的叶黑粉菌属(Entyloma)成员属于后者。目前,该属包含172个均感染双子叶植物的物种。万基(2012年)在广义叶黑粉菌属物种上识别出5个叶黑粉菌物种。其中两个仅在广义叶黑粉菌属中被报道过,而另外三个,即Entyloma ageratinae、Entyloma asterinum和Entyloma compositarum,据报道具有广泛的寄主范围,分别涵盖30种、26种和5种菊科植物。这种广泛的寄主范围与通常认为的叶黑粉菌属物种具有较高寄主特异性形成对比,表明它们可能代表了多个专化物种的复合体。本研究的目的是利用多基因系统发育和形态比较来研究广义叶黑粉菌属。基于多达四个基因座(ITS、RPB2、TEF1和TUB2)的系统发育分析表明,叶黑粉菌标本根据寄主物种聚类。对于其中一些叶黑粉菌谱系,有一些目前未使用的名称可供使用并恢复。此外,狭义叶黑粉菌属被指定了新模式。本研究描述了六个新物种,即Entyloma acaciae on Acacia、Entyloma artemisiae on Artemisia、Entyloma asteris on Aster、Entyloma compositarum on Asteraceae subsp. asteris(模式寄主)以及Entyloma erigeronis on Erigeron、Entyloma gaillardotii on Gaillardotia和Entyloma petasitis on Petasites。为所有物种提供了诊断依据和形态特征。本研究结果再次强调了对原本专化的植物病原菌群体中具有广泛寄主范围的病原体进行详细重新研究的重要性。

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