title: Phylogenetic interrelationships of members of the genera Aeromonas and Plesiomonas as determined by 16S ribosomal DNA sequencing: lack of congruence with results of DNA-DNA hybridizations.
abstract: The phylogenetic interrelationships of members of the genera Aeromonas and Plesiomonas were investigated by using small-subunit ribosomal DNA (rDNA) sequencing. Members of the genus Aeromonas formed a distinct line within the gamma subclass of the Proteobacteria. Plesiomonas shigelloides also clustered within the confines of the gamma subclass of the Proteobacteria but exhibited a closer association with members of the family Enterobacteriaceae than with members of the family Aeromonadaceae. Species of the genus Aeromonas exhibited very high levels of overall sequence similarity (ca. 98 to 100%) with each other. Several of the relationships derived from an analysis of the rDNA sequence data were in marked disagreement with the results of chromosomal DNA-DNA pairing experiments. Diagnostic rDNA signatures that have possible value for differentiating most Aeromonas species were discerned.
authors.affiliation: Department of Microbiology, AFRC Institute of Food Research, Earley Gate, Reading, United Kingdom.
authors.forename: A J
authors.initials: AJ
authors.lastname: Martinez-Murcia
authors.forename: S
authors.initials: S
authors.lastname: Benlloch
authors.forename: M D
authors.initials: MD
authors.lastname: Collins
mesh_terms: D000333:Aeromonas / Q000145:classification* / Q000235:genetics; D001483:Base Sequence; D004269:DNA, Bacterial / Q000737:chemistry* / Q000302:isolation & purification; D004275:DNA, Ribosomal / Q000737:chemistry* / Q000302:isolation & purification; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010802:Phylogeny; D016981:Plesiomonas / Q000145:classification* / Q000235:genetics; D016133:Polymerase Chain Reaction; D012329:RNA, Bacterial / Q000737:chemistry / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000737:chemistry / Q000235:genetics*; D012689:Sequence Homology, Nucleic Acid
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S