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Int J Syst Evol Microbiol 56 (2006), 2937-2943; DOI  10.1099/ijs.0.64032-0
© 2006 International Union of Microbiological Societies

Erwinia tasmaniensis sp. nov., a non-phytopathogenic bacterium from apple and pear trees

Klaus Geider1,{dagger}, Georg Auling2, Zhiqiang Du1, Vladimir Jakovljevic1, Susanne Jock1 and Beate Völksch3

1 Max-Planck-Institut für Zellbiologie, Rosenhof, 68526 Ladenburg, Germany
2 Universität Hannover, Institut für Mikrobiologie, Schneiderberg 50, 30167 Hannover, Germany
3 Friedrich-Schiller-Universität Jena, Institut für Mikrobiologie, Neugasse 25, 07743 Jena, Germany

Correspondence
Klaus Geider
K.Geider{at}bba.de

Bacteria were isolated from flowers and bark of apple and pear trees at three places in Australia. In Victoria, Tasmania and Queensland, strains with white colonies on nutrient agar were screened for dome-shaped colony morphology on agar with sucrose and were found to be closely related by several criteria. The isolates were not pathogenic on apples or pears. They were characterized by a polyphasic approach including microbiological and API assays as well as fatty acid methyl ester analysis, DNA–DNA hybridization and DNA sequencing. For molecular classification, the 16S rRNA cistron and the conserved genes gpd and recA of these bacteria were investigated. Together with other taxonomic criteria, the results of these studies indicate that the bacteria belong to a novel separate species, which we propose to name Erwinia tasmaniensis sp. nov., with the type strain Et1/99T (=DSM 17950T=NCPPB 4357T). From DNA–DNA hybridization kinetics, microbiological characteristics and nucleotide sequence analyses, this species is related to pathogenic Erwinia species, but also to the epiphytic species Erwinia billingiae.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene, gpd and recA sequences of strain Et1/99T are AM055716–AM055718.

Details of the fatty acid compositions of three of the novel strains and related strains and extended versions of the trees shown in Figs 1 and 2 are available as supplementary material in IJSEM Online.

{dagger}Present address: Biologische Bundesanstalt, Schwabenheimer Str. 101, D-69221 Dossenheim, Germany.




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