Clarification of Taxonomic Status within the Pseudomonas syringae Species Group Based on a Phylogenomic Analysis
Clarification of Taxonomic Status within the Pseudomonas syringae Species Group Based on a Phylogenomic Analysis
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DOI：
10.3389/fmicb.2017.02422
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发表时间：
2017-12-07
影响因子：
5.2
通讯作者：
Lalucat, Jorge
中科院分区：
文献类型：
--
作者：
Gomila, Margarita;Busquets, Antonio;Lalucat, Jorge
假单胞菌系统发育组包括15个公认的细菌物种和60多个致病变种。菌株的分类和鉴定与实际原因有关，但也与了解这组植物病原菌的流行病学和生态学有关。基于基因组的分类学分析最近被引入来阐明整个属的分类。一组139个属于P.erichingae组的菌株的草图和完整的基因组序列在公共数据库中可用，连同作为外群的密切相关的物种的基因组一起被分析。比较基因组学的基础上的基因组序列的物种类型的菌株在组允许划定的基因组物种，并表明，高比例的菌株包括在研究中被错误分类。此外，至少有7个推定的新物种的代表进行了检测。此外，还证实了P. ficerectae、P. meliae和P. savastanoi是P. amygdali的后来的同义词，并且“P. coronafaciens”应该作为一个名种复活。
The Pseudomonas syringae phylogenetic group comprises 15 recognized bacterial species and more than 60 pathovars. The classification and identification of strains is relevant for practical reasons but also for understanding the epidemiology and ecology of this group of plant pathogenic bacteria. Genome-based taxonomic analyses have been introduced recently to clarify the taxonomy of the whole genus, A set of 139 draft and complete genome sequences of strains belonging to all species of the P. syringae group available in public databases were analyzed, together with the genomes of closely related species used as outgroups. Comparative genomics based on the genome sequences of the species type strains in the group allowed the delineation of phylogenomic species and demonstrated that a high proportion of strains included in the study are misclassified. Furthermore, representatives of at least 7 putative novel species were detected. It was also confirmed that P. ficuserectae, P. meliae, and P. savastanoi are later synonyms of P. amygdali and that "P. coronafaciens" should be revived as a nomenspecies.