|Jones, Jeffrey - UNIV FLORIDA|
|Lacy, George - VPI & SU, BLACKSBURG, VA|
|Bouzar, Hacene - SAKATA SEED AMERICA, INC.|
|Stall, Robert - UNIV FLORIDA|
Submitted to: Systematic and Applied Microbiology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: June 4, 2004
Publication Date: November 4, 2004
Citation: System. Appl. Microbiology 27:755-762 Interpretive Summary: Four different groups of xanthomonad bacteria have been identified as pathogenic to either pepper or tomato alone or to both. These include Groups A and C which are found in Xanthomonas axonopodis pv. vesicatoria; Group B and Group D found in X. vesicatoria. We present DNA:DNA hybridization data showing Group A, B, C, and D strains all have less than 70% DNA similarity with each other and with the type strain of X. axonopodis (the currently classified species of Xanthomonas containing all the above). We propose Group A strains be designated X. euvesicatoria. We further propose Group B be renamed as X. exitiosa as originally proposed by Gardner and Kendrick in1921. Use of the 'vesicatoria' name should be reserved for strains identified by Doidge in 1921 in her original description when she referred to those strains as being weak starch hydrolyzers. The name X. perforator sp. nov. is proposed for the C group of strains previously designated as X. axonopodis pv. vesicatoria and X. gardneri is proposed for Group D strains.
Technical Abstract: Four phenotypic xanthomonad groups have been identified that are pathogenic to pepper, tomato, or both hosts. These include groups A and C which are found in Xanthomonas axonopodis pv. vesicatoria, group B and D found in X. vesicatoria. We present DNA:DNA hybridization data in which X. axonopodis pv. vesicatoria group A and C strains have less than 70% DNA relatedness with each other, with the type strain of X. axonopodis, and with the currently classified species within Xanthomonas and, therefore, should be removed from this species and given species status. We present information that the A strains most closely resemble the strains originally isolated by Doidge in 1921. In an attempt to avoid confusion in nomenclature as stated in Principle 1 of the Bacteriological Code, we propose that the A strains of X. axonopodis pv. vesicatoria be renamed as X. euvesicatoria (ATCC11633T ). Use of the euvesicatoria epithet should be reserved for strains originally identified by Doidge, which she designated Bacterium vesicatorium in the original description when she referred to those strains as being feebly amylolytic. The name X. perforans sp. nov. is proposed for the C group of strains previously designated as X. axonopodis pv. vesicatoria (ATCC BAA-983T). We also propose that 'X. gardneri', which has less than 70% DNA relatedness with any of the Xanthomonas species and which has never had taxonomic status, be named X. gardneri (ATCC 19865T) to reflect the specific epithet proposed by Sutic in 1957.