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首页> 外文期刊>Journal of bacteriology >Comparative Genomic Analysis of Xanthomonas axonopodis pv. citrumelo F1, Which Causes Citrus Bacterial Spot Disease, and Related Strains Provides Insights into Virulence and Host Specificity
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Comparative Genomic Analysis of Xanthomonas axonopodis pv. citrumelo F1, Which Causes Citrus Bacterial Spot Disease, and Related Strains Provides Insights into Virulence and Host Specificity

机译：Xanthomonas axonopodis pv的比较基因组分析。导致柑橘细菌性斑病的citrumelo F1和相关菌株提供对毒力和宿主特异性的见解

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Xanthomonas axonopodis pv. citrumelo is a citrus pathogen causing citrus bacterial spot disease that is geographically restricted within the state of Florida. Illumina, 454 sequencing, and optical mapping were used to obtain a complete genome sequence of X. axonopodis pv. citrumelo strain F1, 4.9 Mb in size. The strain lacks plasmids, in contrast to other citrus Xanthomonas pathogens. Phylogenetic analysis revealed that this pathogen is very close to the tomato bacterial spot pathogen X. campestris pv. vesicatoria 85-10, with a completely different host range. We also compared X. axonopodis pv. citrumelo to the genome of citrus canker pathogen X. axonopodis pv. citri 306. Comparative genomic analysis showed differences in several gene clusters, like those for type III effectors, the type IV secretion system, lipopolysaccharide synthesis, and others. In addition to pthA, effectors such as xopE3, xopAI, and hrpW were absent from X. axonopodis pv. citrumelo while present in X. axonopodis pv. citri. These effectors might be responsible for survival and the low virulence of this pathogen on citrus compared to that of X. axonopodis pv. citri. We also identified unique effectors in X. axonopodis pv. citrumelo that may be related to the different host range as compared to that of X. axonopodis pv. citri. X. axonopodis pv. citrumelo also lacks various genes, such as syrE1, syrE2, and RTX toxin family genes, which were present in X. axonopodis pv. citri. These may be associated with the distinct virulences of X. axonopodis pv. citrumelo and X. axonopodis pv. citri. Comparison of the complete genome sequence of X. axonopodis pv. citrumelo to those of X. axonopodis pv. citri and X. campestris pv. vesicatoria provides valuable insights into the mechanism of bacterial virulence and host specificity.
机译：Xanthomonas axonopodis pv。 citrumelo是引起柑橘细菌性斑点病的柑橘病原体，其在佛罗里达州范围内受到地理限制。使用Illumina，454测序和光学作图来获得X. axonopodis pv的完整基因组序列。柑橘菌F1，大小4.9 Mb。与其他柑橘类黄单胞菌病原体相比，该菌株缺少质粒。系统发育分析表明，该病原体非常接近番茄细菌斑病原体X. campestris pv。 vesicatoria 85-10，宿主范围完全不同。我们还比较了X. axonopodis pv。柑橘溃疡病病原体X. axonopodis pv。柠檬306.比较基因组分析显示了几个基因簇的差异，如III型效应子，IV型分泌系统，脂多糖合成等。除 pthA 外，X。axonopodis pv还没有诸如 xopE3，xopAI 和 hrpW 的效应子。 citrumelo，同时存在于X. axonopodis pv中。柠檬与X. axonopodis pv相比，这些效应子可能是造成这种病原体在柑橘上存活和低毒力的原因。柠檬我们还确定了X. axonopodis pv中的独特效应子。与X. axonopodis pv的宿主范围不同可能相关的citrumelo。柠檬X.轴突PV。柑桔还缺乏轴突X. axonopodis pv中存在的各种基因，例如 syrE1，syrE2 和RTX毒素家族基因。柠檬这些可能与X. axonopodis pv的独特毒力有关。 citrumelo和X.axonopodis pv。柠檬X. axonopodis pv。的完整基因组序列比较。 citrumelo与X. axonopodis pv。柠檬和X.campestris pv。 vesicatoria提供了有关细菌毒力和宿主特异性机制的宝贵见解。

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