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Pseudomonas pachastrellae sp. nov., isolated from a marine sponge
Lyudmila A Romanenko1, Masataka Uchino2, Enevold Falsen3
1Pacific Institute of Bioorganic Chemistry, Far-Eastern Branch, Russian Academy of Sciences, 690022 Vladivostok, Prospect 100 Let Vladivostoku, 159, Russia.
Summary
Two novel marine bacteria, Pseudomonas pachastrellae, were discovered in a deep-sea sponge. These non-fermentative, non-denitrifying bacteria represent a new species within the Pseudomonas genus.
Area of Science:
- Microbiology
- Bacteriology
- Marine Biology
Background:
- Deep-sea environments harbor unique microbial diversity.
- Marine sponges are known to host symbiotic bacteria.
- Taxonomic classification of novel bacteria is crucial for understanding microbial ecosystems.
Purpose of the Study:
- To taxonomically classify two novel bacterial isolates from a deep-sea sponge.
- To determine the phylogenetic and phenotypic characteristics of the new isolates.
- To propose a new species within the genus Pseudomonas.
Main Methods:
- Polyphasic taxonomic study including 16S rRNA gene sequencing and DNA-DNA relatedness.
- Phylogenetic analysis to determine evolutionary relationships.
- Phenotypic characterization including salt tolerance, pigment production, denitrification, and carbohydrate utilization.
Main Results:
- Two Gram-negative, non-fermentative, rod-shaped bacteria, strains KMM 330(T) and KMM 331, were isolated.
- 16S rRNA gene sequence similarity of 99.9% and DNA-DNA relatedness of 82% between isolates.
- Phylogenetic analysis placed strains within the genus Pseudomonas, forming an independent clade.
- Unique phenotypic characteristics distinguished the isolates from known Pseudomonas species.
- Proposed classification as a new species, Pseudomonas pachastrellae sp. nov.
Conclusions:
- Strains KMM 330(T) and KMM 331 represent a novel species, Pseudomonas pachastrellae, within the genus Pseudomonas.
- The discovery expands the known diversity of marine bacteria associated with sponges.
- Pseudomonas pachastrellae exhibits unique physiological traits adapted to its marine environment.