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Int J Syst Evol Microbiol 54 (2004), 107-113; DOI  10.1099/ijs.0.02718-0
© 2004 International Union of Microbiological Societies

Erwinia papayae sp. nov., a pathogen of papaya (Carica papaya)

Louis Gardan1, Richard Christen2, Wafa Achouak3 and Philippe Prior4

1 UMR de Pathologie Végétale INRA-INH-UNIVERSITE, BP 57, 42 rue G. Morel, 49071 Beaucouzé, France
2 UMR 6543 CNRS and Université de Nice Sophia Antipolis, Centre de biochimie, Parc Valrose, 06108 Nice cedex 2, France
3 CEA/Cadarache, DSV-DEVM, LEMIR, UMR 163 CNRS-CEA-Univ. Méditerranée, Saint Paul-lez-Durance, France
4 INRA, Station de Pathologie Végétale, Domaine St Maurice, BP 94, 84143, Montfavet, France

Correspondence
Louis Gardan
gardan{at}angers.inra.fr

Bacterial canker of papaya (Carica papaya) emerged during the 1980s in different islands of the Caribbean. Nineteen strains of Gram-negative, rod-shaped, non-spore-forming bacteria isolated from papaya were compared to 38 reference and type strains of phytopathogenic Enterobacteriaceae and related bacteria. Phylogenetic analysis of 16S rRNA gene sequences showed that the papaya strains belonged to the genus Erwinia. The DNA G+C content of strain CFBP 5189T, 52·5 mol%, is in the range of the genus Erwinia. The 19 papaya strains were all pathogenic to papaya and were differentiated clearly from type or reference strains of phytopathogenic enterobacteria and related bacteria by phenotypic tests. The papaya strains constituted a discrete DNA hybridization group, indicating that they belonged to a unique genomic species. Thus, strains pathogenic to papaya belong to a novel species for which the name Erwinia papayae sp. nov. is proposed, with the type strain CFBP 5189T (=NCPPB 4294T).

Abbreviations: ML, maximum-parsimony; ML, maximum-likelihood; NJ, neighbour-joining

Published online ahead of print on 4 July 2003 as DOI 10.1099/ijs.0.02718-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of CFBP 5189T is AY131237.

A full phylogenetic tree is available as supplementary material in IJSEM Online.






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