Hugouvieux-Cotte-Pattat Nicole, Pédron Jacques, Van Gijsegem Frédérique
Microbiologie Adaptation et Pathogénie, UMR 5240 CNRS, University Lyon, INSA Lyon, Villeurbanne, France.
Institute of Ecology and Environmental Sciences, Sorbonne University, CNRS, INRAE, Paris, France.
Front Plant Sci. 2023 Jun 20;14:1168480. doi: 10.3389/fpls.2023.1168480. eCollection 2023.
The genus includes plant pathogenic bacteria attacking a wide range of crops and ornamentals as well as a few environmental isolates from water. Defined on the basis of six species in 2005, this genus now includes 12 recognized species. Despite the description of several new species in recent years, the diversity of the genus is not yet fully explored. Many strains have been analyzed for species causing diseases on economically important crops, such as for the potato pathogens and . In contrast, only a few strains have been characterized for species of environmental origin or isolated from plants in understudied countries. To gain insights in the diversity, recent extensive analyzes were performed on environmental isolates and poorly characterized strains from old collections. Phylogenetic and phenotypic analyzes led to the reclassification of (containing strains from tropical or subtropical regions) in the new genus, , the identification of three water species , and , the description of a new species including Australian strains isolated from grasses, and the characterization of the new species and , resulting from the subdivision of the species . Traits distinguishing each new species were identified from genomic and phenotypic comparisons. The high heterogeneity observed in some species, notably for , indicates that additional species still need to be defined. The objective of this study was to clarify the present taxonomy of the genus and to reassign the correct species to several strains isolated before the current classification.
该属包括攻击多种农作物和观赏植物的植物病原细菌以及一些从水中分离出的环境菌株。2005年基于六个物种定义了该属，目前该属包括12个公认的物种。尽管近年来描述了几个新物种，但该属的多样性尚未得到充分探索。已经对许多导致经济上重要作物患病的物种的菌株进行了分析，例如马铃薯病原菌和。相比之下，仅对少数来自环境或在研究不足的国家从植物中分离出的菌株进行了特征描述。为了深入了解该属的多样性，最近对环境分离株和旧收藏中特征不明确的菌株进行了广泛分析。系统发育和表型分析导致将（包含来自热带或亚热带地区的菌株）重新分类到新属中，鉴定出三个水生物种、和，描述了一个新物种，包括从草中分离出的澳大利亚菌株，以及新物种和的特征描述，这是由物种细分产生的。通过基因组和表型比较确定了区分每个新物种的特征。在一些物种中观察到的高度异质性，特别是对于，表明仍需要定义更多物种。本研究的目的是澄清该属目前的分类，并将正确的物种重新分配给在当前分类之前分离的几个菌株。
