The DNA Homology Matrix and Non-Random Variation Concepts as the Basis for the Taxonomic Treatment of Plant Pathogenic and Other Bacteria

Hildebrand, D. C.; Schroth, and M N; Huisman, O. C.

doi:10.1146/annurev.py.20.090182.001315

Cited by 30 publications

(18 citation statements)

References 20 publications

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“…The construction of a three-dimensional model for the DNA homology values was performed with the program 3 ; this calculated threedimensional co-ordinates by using the DNA homology value (Hildebrand et al, 1982). The accuracy, limitations and predictability of the program have been reported elsewhere (Hildebrand et al, 1984).…”

Section: Methodsmentioning

confidence: 99%

Characterization of halobenzoate-degrading, denitrifying Azoarcus and Thauera isolates and description of Thauera chlorobenzoica sp. nov.

Song¹,

Palleroni²,

Kerkhof³

et al. 2001

International Journal of Systematic and Evolutionary Microbiology

105

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The taxonomic relationships of Azoarcus and Thauera isolates in the β-subclass of the Proteobacteria capable of degrading fluoro-, chloro-or bromobenzoate under denitrifying conditions were analysed. A detailed classification of these strains was performed using a polyphasic approach, which included studies on morphology, phenotypic characterization, fatty acid analysis, 16S rRNA gene sequence analysis, 16S rRNA gene mapping (

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Section: Methodsmentioning

confidence: 99%

Characterization of halobenzoate-degrading, denitrifying Azoarcus and Thauera isolates and description of Thauera chlorobenzoica sp. nov.

Song¹,

Palleroni²,

Kerkhof³

et al. 2001

International Journal of Systematic and Evolutionary Microbiology

105

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show abstract

“…DNA homology value transformation. The construction of a three-dimensional model for the DNA homology values was performed with the 3D program calculating a threedimensional coordinate using the DNA homology value (HOM) (Hildebrand et al, 1982). The accuracy, limitations and predictability of the program are reported elsewhere (Hildebrand et al, 1984).…”

Section: Methodsmentioning

confidence: 99%

Taxonomic characterization of denitrifying bacteria that degrade aromatic compounds and description of Azoarcus toluvorans sp. nov. and Azoarcus toluclasticus sp. nov.

Song

Häggblom

Zhou

et al. 1999

International Journal of Systematic and Evolutionary Microbiology

100

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A taxonomic characterization of twenty-one strains capable of degrading aromatic compounds under denitrifying conditions, isolated from ten different geographical locations, was performed on the basis of general morphological and physiological characteristics, cellular fatty acids, DNA base composition, small ribosomal (165) subunit DNA sequences, whole-cell protein patterns and genomic DNA fragmentation analysis, in addition to DNA similarity estimations using hybridization methods. The collection of strains was subdivided into a number of different groups. A first group, consisting of four strains, could be assigned to the previously described species Azoarcus tolulyticus. A second group (five strains) had DNA which reannealed highly to that of strains of the first group, and it is considered to represent a genomovar of A. tolulyticus. The third and fourth groups, composed of a total of five strains, represent a new species of Azoarcus, Azoarcus toluclasticus (group 3 ) and a genomovar of this species (group 4), respectively. Finally, the fifth group, with two strains, corresponds to another new species of the genus Azoarcus, Azoarcus toluvorans. In addition to these five groups, the collection includes five individual strains perhaps representing as many different new species, The above classification is partially consistent with the results of approaches other than DNA-DNA hybridization (electrophoretic patterns of whole-cell proteins and of the fragments obtained after digestion of total DNA with infrequently cutting restriction enzymes). On the other hand, no correlation of these groupings was found in terms of the cellular fatty acid composition. It is also unfortunate that no simple sets of easily determinable phenotypic properties could be defined as being characteristic of each of the groups.

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“…Specific pathogenicity and resistance genes (158) may represent a small proportion of the genome, and they may not always give expression to large enough differences in the phenotype to justify species (94) . The relative ly small number of nutritional differences between closely related pathogens may be coincidental to underlying pathogenicity factors, or they may be evolutionary adaptations favoring the specific host-pathogen interaction (74).…”

Section: Pathogenic Speciation and Environmental Adaptationmentioning

confidence: 99%

“…For instance, the production of phytotoxins, syringomycin, coronatine, phaseolo toxin, and tabtoxin (l12a) form parts of the circumscriptions of these patho vars , as may other associated characters , and could be used for identification. The identification of pathovars is also easier if account is taken of other characters associated with pathogenicity (74,199). Probe methods (55,64,66,100,112,125,134,154) may offer simpler approaches to diagnosis if their specificity to a population's pathogenicity characteristics is proved.…”

Section: Pathovarsmentioning

confidence: 99%

Changing Concepts in the Taxonomy of Plant Pathogenic Bacteria

Young¹,

Takikawa²,

Gardan³

et al. 1992

Annu. Rev. Phytopathol.

104

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The DNA Homology Matrix and Non-Random Variation Concepts as the Basis for the Taxonomic Treatment of Plant Pathogenic and Other Bacteria

Cited by 30 publications

References 20 publications

Characterization of halobenzoate-degrading, denitrifying Azoarcus and Thauera isolates and description of Thauera chlorobenzoica sp. nov.

Characterization of halobenzoate-degrading, denitrifying Azoarcus and Thauera isolates and description of Thauera chlorobenzoica sp. nov.

Taxonomic characterization of denitrifying bacteria that degrade aromatic compounds and description of Azoarcus toluvorans sp. nov. and Azoarcus toluclasticus sp. nov.

Changing Concepts in the Taxonomy of Plant Pathogenic Bacteria

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