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Familial Reclassification Within Order Lysobacterales and Proposal of Four Novel Species

文献类型： 外文期刊

作者： Ma, Tengfei 1 ; Liu, Haijiao 1 ; Chen, Yafei 1 ; Liu, Juan 1 ; Piao, Chungen 2 ; Xue, Han 2 ; Xu, Risheng 1 ; Li, Yong 2 ;

作者机构： 1.Henan Acad Agr Sci, Peanut Res Inst, Zhengzhou 450002, Peoples R China

2.Chinese Acad Forestry, Ecol & Nat Conservat Inst, Key Lab Biodivers Conservat Natl Forestry & Grassl, Beijing 100091, Peoples R China

关键词： Lysobacterales; phylogenomic; reannotation taxonomy; bacterial core genes

期刊名称：MICROORGANISMS （ 影响因子：4.2； 五年影响因子：4.6 ）

ISSN：

年卷期： 2025 年 13 卷 6 期

页码：

收录情况： SCI

摘要： The order Lysobacterales consists of three families (Rhodanobacteraceae, Lysobacteraceae and Marinicellaceae), many members of which are important pathogenic and beneficial bacteria. Previous classifications of members within order Lysobacterales have relied heavily on 16S rRNA gene sequences, leading to taxonomic ambiguities at the familial level. With the advancement of sequencing technologies, an increasing number of whole-genome sequences have been available, providing an opportunity to revisit the taxonomy of families in Lysobacterales. In this study, we revisited the taxonomy of Lysobacterales by focusing on family-level reclassification based on phylogenomic frameworks. A total of 218 genome sequences, including 217 strains from Lysobacterales and 1 from Nevskiales (used as an outgroup), were collected for phylogenetic analysis. Phylogenetic relationships were inferred based on UBCG (up-to-date bacterial core gene) approach using 92 core genes and a concatenated protein phylogeney based on 227 single-copy orthologous proteins. Additionally, genomic similarity metrics, including average nucleotide identity (ANI), digital DNA-DNA hybridization (dDDH), average amino acid identity (AAI) and core-proteome average amino acid identity (cpAAI), were employed to assess the taxonomy of order Lysobacterales. Our results support the proposal of one novel family and the reassignment of six genera across different families within Lysobacterales, emphasizing the need for a refined family-level taxonomy. In addition, four novel species belonging to the family Lysobacteraceae were also confirmed. This study provides an updated familial framework for Lysobacterales, laying a robust foundation for future detailed taxonomic revisions at the genus and species levels.

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