Ah-You Nathalie, Gagnevin Lionel, Grimont Patrick A. D., Brisse Sylvain, Nesme Xavier, Chiroleu Frédéric, Bui Thi Ngoc Lan, Jouen Emmanuel, Lefeuvre Pierre, Vernière Christian, Pruvost Olivier. 2008. Reclassification of Xanthomonads associated with anacardiaceae into two species and three pathovars. Journal of Plant Pathology, 90 (2), suppl., Résumé, S2.352 International Congress of Plant Pathology. 9, Turin, Italie, 24 Août 2008/29 Août 2008.
Résumé : Mango, cashew, Brazilian pepper and ambarella are host species of Xanthomonas strains which have a broad genetic and phenotypic diversity. Until now, it was not determined whether they should be classified as strains of a single pathovar with a broad host range or as several pathovars. A polyphasic approach was used to determine their respective taxonomie positions, their mutual relationships and their relationship to other Xanthomonas species. Pathogenicity tests and amplified fragment length polymorphism (AFLP) suggested the distinction of three pathovars presenting a host specialization: pv mangiferaeindicae on mango and Brazilian pepper, pv. anacardii on cashew and pv. spondiae on ambarella. AFLP and multilocus sequence analysis (MLSA) were congruent and showed that the three pathovars are related to X. axonopodis genetic groups 9.5, 9.6 and 9.4, respectively. DNADNA hybridization, AFLP and MLSA indicated that pvs. mangiferaeindicae, anacardii and citri (the causal agent of citrus canker) belong to a single species and that they should not be classified as X. axonopodis. Our results agree with the recent elevation of pv citri to, species level and propose to include pvs. mangiferaeindicae and anacardii in this species. Pathovar spondiae is genetically related to group 9.4, for which no reclassification has yet been proposed. (Texte intégral)
Mots-clés Agrovoc : Xanthomonas, Anacardiaceae, pathotype, taxonomie, classification, Xanthomonas axonopodis
Mots-clés complémentaires : Xanthomonas campestris pv. mangiferaeindicae, Xanthomonas axonopodis pv dieffenbachiae
Classification Agris : H20 - Maladies des plantes
Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique
Auteurs et affiliations
- Ah-You Nathalie, Université de la Réunion (REU)
- Gagnevin Lionel, CIRAD-BIOS-UMR PVBMT (REU)
- Grimont Patrick A. D., Institut Pasteur (FRA)
- Brisse Sylvain, Institut Pasteur (FRA)
- Nesme Xavier, CNRS (FRA)
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Chiroleu Frédéric, CIRAD-BIOS-UMR PVBMT (REU)
ORCID: 0000-0002-4874-5357
- Bui Thi Ngoc Lan, CIRAD-BIOS-UMR PVBMT (REU)
- Jouen Emmanuel, Université de la Réunion (REU)
- Lefeuvre Pierre, CIRAD-BIOS-UMR PVBMT (REU)
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Vernière Christian, CIRAD-BIOS-UMR PVBMT (REU) ORCID: 0000-0002-2312-2073
- Pruvost Olivier, CIRAD-BIOS-UMR PVBMT (REU)
Source : Cirad - Agritrop (https://agritrop.cirad.fr/547196/)
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