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Comparative genomic analysis of Pseudomonas amygdali pv. lachrymans NM002: Insights into its potential virulence genes and putative invasion determinants

Li, Lei, Yuan, Lifang, Shi, Yanxia, Xie, Xuewen, Chai, Ali, Wang, Qi, Li, Baoju
Genomics 2019 v.111 no.6 pp. 1493-1503
Cucumis sativus, Pseudomonas amygdali, Pseudomonas syringae, chemotaxis, cucumbers, flagellum, genes, genomics, leaf spot, lipopolysaccharides, pathogenesis, pathovars, phaseolotoxin, phyllosphere, plant pathogenic bacteria, quorum sensing, virulence
Pseudomonas amygdali pv. lachrymans is currently of important plant pathogenic bacteria that causes cucumber angular leaf spot worldwide. The pathogen has been studied for its roles in pathogenicity and plant inheritance resistance. To further delineate traits critical to virulence, invasion and survival in the phyllosphere, we reported the first complete genome of P. amygdali pv. lachrymans NM002. Analysis of the whole genome in comparison with three closely-related representative pathovars of P. syringae identified the conservation of virulence genes, including flagella and chemotaxis, quorum-sensing systems, two-component systems, and lipopolysaccharide and antiphagocytosis. It also revealed differences of invasion determinants, such as type III effectors, phytotoxin (coronatine, syringomycin and phaseolotoxin) and cell wall-degrading enzyme, which may contribute to infectivity. The aim of this study was to derive genomic information that would reveal the probable molecular mechanisms underlying the virulence, infectivity and provide a better understanding of the pathogenesis of the P. syringae pathovars.