dc.contributor.advisor | Krumholz, Lee R., | en_US |
dc.contributor.author | Castaneda Carrion, Irma Nydia. | en_US |
dc.date.accessioned | 2013-08-16T12:20:56Z | |
dc.date.available | 2013-08-16T12:20:56Z | |
dc.date.issued | 2007 | en_US |
dc.identifier.uri | https://hdl.handle.net/11244/1276 | |
dc.description.abstract | These results suggest that these strains have different genomic organization. The presence of plasmid DNA was only detected in Desulfovibrio SR-1. On the basis of distinct phenotypic and genotypic characteristics, strain Desulfovibrio SR-1 represents a novel subspecies of D. africanus . | en_US |
dc.description.abstract | Molecular techniques applied to microbial taxonomy were used for the discrimination between Desulfovibrio SR-1 and Desulfovibrio africanus. Desulfovibrio SR-1 has a single polar flagellum and ferments pyruvate. D. africanus has lophotrichus flagella and pyruvate does not support its growth in sulfate-free media. The 16S rRNA gene and the ITS sequence analyses showed the same phylogenetic affiliation for both strains. The DNA sequences of the ITS region of Desulfovibrio SR-1 and D. africanus contain two transfer RNA genes (tRNAIle, tRNAAla), and they are 300 and 299 bases in length, respectively. The analysis of dsrAB sequences showed a better discrimination power than the 16S rRNA sequences in defining their phylogenetic affiliation. The 72% DNA-DNA similarity value did not conclusively resolve whether these strains should be considered as members of one species. The 62.4 mol% G+C content of Desulfovibrio SR-1 differs from the 63.1 mol% G+C of D. africanus. Significant differences in the genomic fingerprints (16S rDNA, PmeI-PFGE and BOX-PCR) between both strains were observed. | en_US |
dc.format.extent | xi, 111 leaves : | en_US |
dc.subject | Desulfovibrio. | en_US |
dc.subject | Biology, Microbiology. | en_US |
dc.subject | Genetic engineering. | en_US |
dc.subject | Plasmids. | en_US |
dc.title | Isolation and characterization of small naturally occurring plasmids from Desulfovibrio spp. | en_US |
dc.type | Thesis | en_US |
dc.thesis.degree | Ph.D. | en_US |
dc.thesis.degreeDiscipline | Department of Microbiology and Plant Biology | en_US |
dc.note | Adviser: Lee R. Krumholz. | en_US |
dc.note | Source: Dissertation Abstracts International, Volume: 68-12, Section: B, page: 7792. | en_US |
ou.identifier | (UMI)AAI3291053 | en_US |
ou.group | College of Arts and Sciences::Department of Microbiology and Plant Biology | |