Didymellaceae revisited.
Didymellaceae revisited.
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重温二甲藻科
DOI：
10.1016/j.simyco.2017.06.002
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发表时间：
2017-06
影响因子：
16.5
通讯作者：
Cai L
中科院分区：
文献类型：
--
作者：
Chen Q;Hou LW;Duan WJ;Crous PW;Cai L
Didymellaceae是真菌王国中物种最丰富的家族之一，包括栖息在广泛生态系统中的物种。根据多基因座DNA序列数据，最近对Didymellaceae的分类进行了修订。在本研究中，我们调查了来自阿根廷，澳大利亚，加拿大，中国，匈牙利，以色列，意大利，日本，南非，荷兰，美国和前南斯拉夫的27个植物科，40种寄主植物和各种基质的洞穴，包括空气，水和碳酸盐岩，新获得的108 Didymellaceae分离物。其中，代表32个新分类群的68个分离物是基于多位点的同源性使用的LSU，ITS，rpb 2和tub2序列，和形态差异识别。在Didymellaceae内，有五个属似乎仅限于特定的宿主科，其他属具有更广泛的宿主范围。该科共有19个属，其中Heracleicola被简化为Ascochyta下的同义词。本研究为进一步了解杜蕨科植物的分布和生物多样性提供了重要的资料，但仍有几个属的归属尚待明确。
The Didymellaceae is one of the most species-rich families in the fungal kingdom, and includes species that inhabit a wide range of ecosystems. The taxonomy of Didymellaceae has recently been revised on the basis of multi-locus DNA sequence data. In the present study, we investigated 108 Didymellaceae isolates newly obtained from 40 host plant species in 27 plant families, and various substrates from caves, including air, water and carbonatite, originating from Argentina, Australia, Canada, China, Hungary, Israel, Italy, Japan, South Africa, the Netherlands, the USA and former Yugoslavia. Among these, 68 isolates representing 32 new taxa are recognised based on the multi-locus phylogeny using sequences of LSU, ITS, rpb2 and tub2, and morphological differences. Within the Didymellaceae, five genera appeared to be limited to specific host families, with other genera having broader host ranges. In total 19 genera are recognised in the family, with Heracleicola being reduced to synonymy under Ascochyta. This study has significantly improved our understanding on the distribution and biodiversity of Didymellaceae, although the placement of several genera still need to be clarified.