title: Occurrence and antagonistic potential of Stenotrophomonas strains isolated from deep-sea invertebrates.
abstract: Stenotrophomonas maltophilia is known to be of significance as opportunistic pathogen as well as a source of biocontrol and bioremediation activities. S. maltophilia strains have been isolated from rhizospheres, soil, clinical material, aquatic habitats, but little is known about Stenotrophomonas strains recovered from marine environments. During a survey of the biodiversity of Pseudomonas-like bacteria associated with deep-sea invertebrates six Stenotrophomonas strains were isolated from sponge, sea urchin, and ophiura specimens collected from differing Pacific areas, including the Philippine Sea, the Fiji Sea and the Bering Sea. 16S rRNA gene sequence analysis confirmed an assignment of marine isolates to the genus Stenotrophomonas as it placed four strains into the S. maltophilia CIP 60.77T cluster and two related to the S. rhizophila DSM 14405T. Together with a number of common characteristics typical of S. maltophilia and S. rhizophila marine isolates exhibited differences in pigmentation, a NaCl tolerance, a range of temperatures, which supported their growth, substrate utilization pattern, and antibiotics resistance. Strains displayed hemolytic and remarkable inhibitory activity against a number of fungal cultures and Gram-positive microorganisms, but very weak or none against Candida albicans. This is the first report on isolation, taxonomic characterization and antimicrobial activity of Stenotrophomonas strains isolated from deep-sea invertebrates.
authors.affiliation: Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch, Russian Academy of Sciences, 690022 Vladivostok, Prospect 100 Let Vladivostoku, 159, Russia. romanenko1@yahoo.com
authors.forename: Lyudmila A
authors.initials: LA
authors.lastname: Romanenko
authors.forename: Masataka
authors.initials: M
authors.lastname: Uchino
authors.forename: Naoto
authors.initials: N
authors.lastname: Tanaka
authors.forename: Galina M
authors.initials: GM
authors.lastname: Frolova
authors.forename: Natalia N
authors.initials: NN
authors.lastname: Slinkina
authors.forename: Valery V
authors.initials: VV
authors.lastname: Mikhailov
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000378:metabolism / Q000494:pharmacology; D000898:Antibiosis; D000935:Antifungal Agents / Q000378:metabolism / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D018407:Bacterial Physiological Phenomena; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D024881:Drug Resistance, Bacterial; D005227:Fatty Acids / Q000737:chemistry / Q000378:metabolism; D005658:Fungi / Q000187:drug effects / Q000502:physiology; D007448:Invertebrates / Q000382:microbiology*; D008969:Molecular Sequence Data; D010140:Pacific Ocean; D010641:Phenotype; D010802:Phylogeny; D010860:Pigments, Biological / Q000737:chemistry / Q000378:metabolism; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012623:Seawater / Q000382:microbiology*; D017422:Sequence Analysis, DNA; D020588:Stenotrophomonas / Q000737:chemistry / Q000145:classification / Q000302:isolation & purification* / Q000502:physiology*
chemical_list: D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D010860:Pigments, Biological; D012336:RNA, Ribosomal, 16S