Xanthomonas citri pv. citri pathotypes: LPS structure and function as microbe-associated molecular patterns

Di Lorenzo Flaviana, Silipo Alba, Andersen Gersby Lotte Bettina, Palmigiano Angelo, Lanzetta Rosa, Garozzo Domenico, Boyer Claudine, Pruvost Olivier, Newman Mari-Anne, Molinaro Antonio. 2017. Xanthomonas citri pv. citri pathotypes: LPS structure and function as microbe-associated molecular patterns. ChemBioChem, 18 (8) : 772-781.

https://doi.org/10.1002/cbic.201600671

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Quartile : Q2, Sujet : CHEMISTRY, MEDICINAL / Quartile : Q3, Sujet : BIOCHEMISTRY & MOLECULAR BIOLOGY

Résumé : Xanthomonas citri pv. citri is the pathogen responsible for Asiatic citrus canker, one of the most serious citrus diseases worldwide. The lipopolysaccharide (LPS) molecule has been demonstrated to be involved in X. citri pv. citri virulence. Despite enormous progress in investigations of the molecular mechanisms for bacterial pathogenicity, determination of the detailed LPS structure–activity relationship is limited, as the current knowledge is mainly based on structural determination of one X. citri pv. citri strain. As X. citri pv. citri strains are distinguished into three main pathogenicity groups, we characterized the full structure of the LPS from two pathotypes that differ in their host-range specificity. This revealed an intriguing difference in LPS O-chain structure. We also tested the LPSs and isolated lipid A moieties for their ability to act as microbe-associated molecular patterns in Arabidopsis thaliana. Both LPS/lipid As induced ROS accumulation, but no difference was observed between the two pathotypes.

Mots-clés Agrovoc : Xanthomonas campestris citri, Citrus, pathotype, pouvoir pathogène, interactions biologiques, lipopolysaccharide, structure chimique

Mots-clés complémentaires : Xanthomonas citri pv citri

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

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