Mycosphaerellaceae – Chaos or clarity?

IF 14.1 1区生物学 Q1 MYCOLOGY Studies in Mycology Pub Date : 2017-06-01 DOI:10.1016/j.simyco.2017.09.003

S.I.R. Videira , J.Z. Groenewald , C. Nakashima , U. Braun , R.W. Barreto , P.J.G.M. de Wit , P.W. Crous

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引用次数: 109

Abstract

The Mycosphaerellaceae represent thousands of fungal species that are associated with diseases on a wide range of plant hosts. Understanding and stabilising the taxonomy of genera and species of Mycosphaerellaceae is therefore of the utmost importance given their impact on agriculture, horticulture and forestry. Based on previous molecular studies, several phylogenetic and morphologically distinct genera within the Mycosphaerellaceae have been delimited. In this study a multigene phylogenetic analysis (LSU, ITS and rpb2) was performed based on 415 isolates representing 297 taxa and incorporating ex-type strains where available. The main aim of this study was to resolve the phylogenetic relationships among the genera currently recognised within the family, and to clarify the position of the cercosporoid fungi among them. Based on these results many well-known genera are shown to be paraphyletic, with several synapomorphic characters that have evolved more than once within the family. As a consequence, several old generic names including Cercosporidium, Fulvia, Mycovellosiella, Phaeoramularia and Raghnildiana are resurrected, and 32 additional genera are described as new. Based on phylogenetic data 120 genera are now accepted within the family, but many currently accepted cercosporoid genera still remain unresolved pending fresh collections and DNA data. The present study provides a phylogenetic framework for future taxonomic work within the Mycosphaerellaceae.

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真菌科——混乱还是清晰?

Mycosphaerellaceae代表了数千种真菌，它们与广泛的植物宿主上的疾病有关。鉴于真菌科植物对农业、园艺和林业的影响，了解和稳定真菌科属和种的分类是至关重要的。基于以往的分子研究，在真菌菌科中划分了几个系统发育和形态上不同的属。本研究采用多基因系统发育分析(LSU、ITS和rpb2)对来自297个分类群的415株分离株进行了系统发育分析，并在可能的情况下纳入前型菌株。本研究的主要目的是解决目前在科内公认的属之间的系统发育关系，并澄清在其中的地位。基于这些结果，许多已知的属被证明是副属，具有几个在家族内进化不止一次的突触性特征。结果，包括Cercosporidium、Fulvia、Mycovellosiella、Phaeoramularia和Raghnildiana在内的几个旧的属被复活，另外32个属被描述为新属。根据系统发育数据，目前在该科中有120个属被接受，但许多目前被接受的类麻虫属仍未得到解决，有待于新的收集和DNA数据。本研究为今后真菌科的分类工作提供了系统发育框架。

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来源期刊

Studies in Mycology 生物-真菌学

CiteScore

35.60

自引率

3.00%

发文量

期刊介绍： The international journal Studies in Mycology focuses on advancing the understanding of filamentous fungi, yeasts, and various aspects of mycology. It publishes comprehensive systematic monographs as well as topical issues covering a wide range of subjects including biotechnology, ecology, molecular biology, pathology, and systematics. This Open-Access journal offers unrestricted access to its content. Each issue of Studies in Mycology consists of around 5 to 6 papers, either in the form of monographs or special focused topics. Unlike traditional length restrictions, the journal encourages submissions of manuscripts with a minimum of 50 A4 pages in print. This ensures a thorough exploration and presentation of the research findings, maximizing the depth of the published work.