Journal of Microbiology

Research Support, Non-U.S. Gov'ts

Rhodopirellula rosea sp. nov., a Novel Bacterium Isolated from an Ark Clam Scapharca broughtonii: Seong Woon Roh , Hae-Won Lee , Kyung June Yim , Na-Ri Shin , Jina Lee , Tae Woong Whon , Na-Lae Lim , Daekyung Kim , Jin-Woo Bae; J. Microbiol. 2013;51(3):301-304. Published online June 28, 2013; DOI: https://doi.org/10.1007/s12275-013-3210-x

Abstract: A novel Gram-negative, motile, and ovoid-shaped strain, LHWP3T, which belonged to the family Planctomycetaceae in the phylum Planctomycetes, was isolated from a dead ark clam Scapharca broughtonii collected during a mass mortality event on the south coast of Korea. Phylogenetic analysis based on the 16S rRNA gene sequences indicated that the isolate was most closely related to the type strain of Rhodopirellula baltica, with a shared 16S rRNA gene sequence similarity of 94.8%. The isolate grew optimally at 30°C in 4–6% (w/v) NaCl, and at pH 7. The major isoprenoid quinone was menaquinone-6 (MK-6). The dominant polar lipids were phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine, and unidentified polar lipids. The predominant cellular fatty acids were C16:0, C18:1 ω9c, and C18:0. The genomic DNA G+C content of strain LHWP3T was 53.0 mol%. Based on polyphasic taxonomic analyses, strain LHWP3T should be classified as a novel species in the genus Rhodopirellula in the family Planctomycetaceae, for which the name Rhodopirellula rosea sp. nov. is proposed. The type strain is LHWP3T (=KACC 15560T =JCM 17759T).

Paenibacillus marinisediminis sp. nov., a Bacterium Isolated from Marine Sediment: Hae-Won Lee , Seong Woon Roh , Kyung June Yim , Na-Ri Shin , Jina Lee , Tae Woong Whon , Joon Yong Kim , Dong-Wook Hyun , Daekyung Kim , Jin-Woo Bae; J. Microbiol. 2013;51(3):312-317. Published online June 28, 2013; DOI: https://doi.org/10.1007/s12275-013-3198-2

Abstract: A Gram-negative, nonmotile, endospore-forming, rod-shaped bacterial strain LHW35T, which belonged to the genus Paenibacillus, was isolated from marine sediment collected from the south coast of the Republic of Korea. A phylogenetic analysis of 16S rRNA gene sequences indicated that strain LHW35T was most closely related to Paenibacillus taiwanensis G-soil-2-3T (97.2% similarity). The optimal growth conditions for strain LHW35T were 37°C, pH 6.0, and 0% (w/v) NaCl. The main isoprenoid quinone was menaquinone-7 (MK-7) and the major polyamine was spermidine. The diamino acid present in the cell-wall peptidoglycan was meso-diaminopimelic acid. The major fatty acids were anteiso-C15:0 and C16:0. The polar lipids were phosphatidylethanolamine, phosphatidylglycerol, unidentified aminohospholipids, unidentified phospholipids, and unidentified polar lipids. A DNA-DNA hybridization experiment using the type strain of P. taiwanensis indicated <40% relatedness. The DNA G+C content was 45.0 mol%. Based on these phylogenetic, genomic, and phenotypic analyses, strain LHW35T should be classified as a novel species within the genus Paenibacillus, for which the name Paenibacillus marinisediminis sp. nov. is proposed. The type strain is LHW35T (=KACC 16317T =JCM 17886T).

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