Diversity and geographical structure of Xanthomonas citri pv. citri on citrus in the South West Indian Ocean Region

Pruvost Olivier, Richard Damien, Boyer Karine, Javegny Stéphanie, Boyer Claudine, Chiroleu Frédéric, Grygiel Pierre, Parvedy Evelyne, Robène Isabelle, Maillot-Lebon Véronique, Hamza Abdou Azali, Lobin Kanta Kumar, Naiken Marc, Vernière Christian. 2021. Diversity and geographical structure of Xanthomonas citri pv. citri on citrus in the South West Indian Ocean Region. Microorganisms, 9 (5):945, 15 p.

https://doi.org/10.3390/microorganisms9050945

Article de revue ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total

Prévisualisation

Version publiée - Anglais
Sous licence

.
Pruvost_2021_microorganisms-Diversity Xcc SWIO.pdf
Télécharger (5MB) | Prévisualisation

Quartile : Q2, Sujet : MICROBIOLOGY

Résumé : A thorough knowledge of genotypic and phenotypic variations (e.g., virulence, resistance to antimicrobial compounds) in bacteria causing plant disease outbreaks is key for optimizing disease surveillance and management. Using a comprehensive strain collection, tandem repeat-based genotyping techniques and pathogenicity assays, we characterized the diversity of X. citri pv. citri from the South West Indian Ocean (SWIO) region. Most strains belonged to the prevalent lineage 1 pathotype A that has a wide host range among rutaceous species. We report the first occurrence of genetically unrelated, nonepidemic lineage 4 pathotype A* (strains with a host range restricted to Mexican lime and related species) in Mauritius, Moheli and Réunion. Microsatellite data revealed that strains from the Seychelles were diverse, grouped in three different clusters not detected in the Comoros and the Mascarenes. Pathogenicity data suggested a higher aggressiveness of strains of one of these clusters on citron (Citrus medica). With the noticeable exception of the Comoros, there was no sign of recent interisland movement of the pathogen. Consistent with this finding, the copL gene, a marker for the plasmid-borne copLAB copper resistance that was recently identified in Réunion, was not detected in 568 strains from any islands in the SWIO region apart from Réunion.

Mots-clés Agrovoc : pathologie végétale, bactérie pathogène, épidémiologie, surveillance épidémiologique, variation génétique, variation phénotypique, Citrus medica, Xanthomonas campestris citri

Mots-clés géographiques Agrovoc : Maurice, La Réunion, Comores, Seychelles, France

Mots-clés complémentaires : Xanthomonas citri pv citri

Mots-clés libres : Épidémiologie moléculaire, Agrumes, XANTHOMONAS, Chancre asiatique des agrumes, Océan Indien, Xanthomonas citri pv. citri

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Auteurs et affiliations