4.6 Article

Complete Genome Sequence of Xylella taiwanensis and Comparative Analysis of Virulence Gene Content With Xylella fastidiosa

期刊

FRONTIERS IN MICROBIOLOGY
卷 12, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fmicb.2021.684092

关键词

Xylella; Xanthomonadaceae; plant pathogens; pear leaf scorch; genome; virulence

资金

  1. Ministry of Science and Technology of Taiwan [MOST 106-2923-B-002-005-MY3]
  2. Academia Sinica

向作者/读者索取更多资源

The Xylella genus contains plant pathogens that are major threats to agriculture in America and Europe. Extensive research has been conducted on different subspecies of Xylella fastidiosa (Xf), but comparative analysis at above-species levels was lacking due to the unavailability of appropriate data sets. A new Xylella species causing pear leaf scorch in Taiwan was recently described, and the complete genome sequence of this species was reported in this study. The study contributed to understanding the phylogeny, genomic divergence, and gene content of various Xylella representatives.
The bacterial genus Xylella contains plant pathogens that are major threats to agriculture in America and Europe. Although extensive research was conducted to characterize different subspecies of Xylella fastidiosa (Xf), comparative analysis at above-species levels was lacking due to the unavailability of appropriate data sets. Recently, a bacterium that causes pear leaf scorch (PLS) in Taiwan was described as the second Xylella species (i.e., Xylella taiwanensis; Xt). In this work, we report the complete genome sequence of Xt type strain PLS229(T). The genome-scale phylogeny provided strong support that Xf subspecies pauca (Xfp) is the basal lineage of this species and Xylella was derived from the paraphyletic genus Xanthomonas. Quantification of genomic divergence indicated that different Xf subspecies share similar to 87-95% of their chromosomal segments, while the two Xylella species share only similar to 66-70%. Analysis of overall gene content suggested that Xt is most similar to Xf subspecies sandyi (Xfs). Based on the existing knowledge of Xf virulence genes, the homolog distribution among 28 Xylella representatives was examined. Among the 11 functional categories, those involved in secretion and metabolism are the most conserved ones with no copy number variation. In contrast, several genes related to adhesins, hydrolytic enzymes, and toxin-antitoxin systems are highly variable in their copy numbers. Those virulence genes with high levels of conservation or variation may be promising candidates for future studies. In summary, the new genome sequence and analysis reported in this work contributed to the study of several important pathogens in the family Xanthomonadaceae.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据