Effect of Light Regime on Puniceispirillum marinum IMCC1322 in Nutrient-Replete Conditions.

Previous studies showed no improvement in bacterial biomass for Puniceispirillum marinum IMCC1322 under light regimes. Nevertheless, in nutrient-replete cultures with higher inoculating cell densities, strain IMCC1322 exhibited proteorhodopsin photoheterotrophy. Increasing both inoculum size and the amino acid pool can eliminate quorum sensing and starvation responses in strain IMCC1322.

Phylosymbiosis in Seven Wild Fish Species Collected Off the Southern Coast of Korea: Skin Microbiome Most Strongly Reflects Evolutionary Pressures.

Phylosymbiosis is defined as the relationship in which the microbiome recapitulates the phylogeny of the host and has been demonstrated in a variety of terrestrial organisms, although it has been understudied in fish, the most phylogenetically diverse vertebrate. Given that the species-specificity of fish microbiomes was detected in multiple body parts and differed by body parts, we assumed that the phylogenetic reflection of the microbiome would differ across body parts. Thus, we analyze the difference of phylosymbiotic relationships in the microbial communities found in three body parts (skin, gills, and intestine) of seven wild fish species from four families (Labridae, Sebastidae, Sparidae, and Rajidae) via 16S rRNA gene amplicon sequencing.

Flavivirga spongiicola sp. nov. and Flavivirga abyssicola sp. nov., Isolated from Marine Environments.

Two novel Gram-stain-negative, strictly-aerobic, rod-shaped (1.2 ± 3.4 μm × 0.

Comparative Microbiome Analysis of Artemia spp. and Potential Role of Microbiota in Cyst Hatching.

Brine shrimp (Artemia spp.) is a significant factor in determining aquaculture production. Since the microbiota of Artemia can colonize the gut in larvae, various microorganisms transmitted from Artemia can affect host larval health.

Genomic potential and physiological characteristics of C1 metabolism in novel acetogenic bacteria.

Acetogenic bacteria can utilize C1 compounds, such as carbon monoxide (CO), formate, and methanol, via the Wood-Ljungdahl pathway (WLP) to produce biofuels and biochemicals. Two novel acetogenic bacteria of the family ES2 and ES3 were isolated from Eulsukdo, a delta island in South Korea. We conducted whole genome sequencing of the ES strains and comparative genome analysis on the core clusters of WLP with DSM1030 and ATCC8486.

sp. nov., an arginine biosynthesis archaeal species isolated from the Central Indian Ocean ridge.

A strictly anaerobic hyperthermophilic archaeon, designated strain IOH2, was isolated from a deep-sea hydrothermal vent (Onnuri vent field) area on the Central Indian Ocean Ridge. Strain IOH2 showed high 16S rRNA gene sequence similarity to MM 739 (99.42 %), DSM 10322 (99.

Description of Fervidibacillus gen. nov. with Two Species, Fervidibacillus albus sp. nov., and Fervidibacillus halotolerans sp. nov., Isolated from Tidal Flat Sediments and Emendation of Misclassificed Taxa in the Genus Caldibacillus.

Two Gram-stain-positive, motile, endospore-forming, facultatively anaerobic strains, designated MEBiC13591 and MEBiC13594, were isolated from tidal flat sediment of the Incheon City on the west coast of Korea. Growth of both novel strains was observed at pH 5-9 (optimum, pH 7-7.5), and in 0-8% NaCl (optimum, 2% for MEBiC13591 and 3% for MEBiC13594).

Probiotic effects of Pseudoalteromonas ruthenica: Antibacterial, immune stimulation and modulation of gut microbiota composition.

This study aimed to characterise and evaluate the probiotic properties of a newly isolated marine bacterium, strain S6031. The isolated strain was identified as Pseudoalteromonas ruthenica. In vivo experiments were conducted with P.

The complete mitochondrial genome of the sand dollar (Verrill, 1867) (Echinoidea: Astriclypeidae) in the subtidal sand flat in Jeju Island off the south coast of Korea.

We sequenced the complete mitochondrial genome of sand dollar (Verrill 1867) (Echinoidea: Astriclypeidae) occurring in the subtidal sand flat in Jeju Island off the south coast of Korea. The mitochondrial genome was 15,744 bp in length and contained 13 protein-coding genes (PCGs), 22 transfer RNAs, two ribosomal RNAs, and 140 nucleotides representing the putative control region. We reconstructed the concatenated phylogenetic tree based on 13 PCGs of 18 echinoderms, including .

sp. nov., a CO-utilizing bacterium isolated from tidal flat sediment, and emended description of the genus .

A novel anaerobic, rod-shaped, non-motile bacterium, designated strain ES005, was isolated from tidal flat sediments near the rhizosphere of at Eulsukdo Island, Republic of Korea. A polyphasic approach revealed that cells of the strain were Gram-stain-positive, catalase- and oxidase-negative, non-spore-forming rods. Phylogenetic analyses based on 16S rRNA gene sequences revealed that strain ES005 belonged to the family , class and showed the highest sequence similarity to s (97.

Establishment of Genome Based Criteria for Classification of the Family Desulfovibrionaceae and Proposal of Two Novel Genera, gen. nov. and gen. nov.

Bacteria in the Desulfovibrionaceae family, which contribute to S element turnover as sulfate-reducing bacteria (SRB) and disproportionation of partially oxidized sulfoxy anions, have been extensively investigated since the importance of the sulfur cycle emerged. Novel species belonging to this taxon are frequently reported, because they exist in various environments and are easy to culture using established methods. Due to the rapid expansion of the taxon, correction and reclassification have been conducted.

sp. nov., isolated from tidal flat sediment, and emended descriptions of the genus and .

A novel bacterium, designated SCR006, was isolated from tidal flat sediment from Suncheon Bay, Republic of Korea. Cells of strain SCR006 were strictly anaerobic, motile cocci, Gram-reaction-negative, and catalase- and oxidase-negative. Growth was observed at 4-41 °C (optimum, 34-37 °C), at pH 6.

Constantimarinum furrinae gen. nov., sp. nov., a marine bacterium isolated from saline volcanic rock aquifer (lava seawater) at Jeju Island, Republic of Korea.

A Gram-stain-negative, aerobic, rod-shaped (0.3-0.5 × 1.

sp. nov., a marine bacterium isolated from tidal flat sediment and emended description of the genus Hameed . 2015.

A Gram-stain-negative, facultatively anaerobic, rod-shaped (1.8-4.4×0.

Description of gen. nov., sp. nov., and gen. nov., comb. nov. via reclassification of the genus .

Strain MEBiC09520, which was isolated from a tidal sediment in Incheon, Korea, is a pale yellow, rod-shaped bacterium, cells of which are 0.4-0.5 µm in width and 1.

Thermococcus indicus sp. nov., a Fe(III)-reducing hyperthermophilic archaeon isolated from the Onnuri Vent Field of the Central Indian Ocean ridge.

A strictly anaerobic, dissimilatory Fe(III)-reducing hyperthermophilic archaeon, designated as strain IOH1, was isolated from a new deep-sea hydrothermal vent (Onnuri Vent Field) area in the Central Indian Ocean ridge. Strain IOH1 showed > 99% 16S rRNA gene sequence similarity with Thermococcus celericrescens TS2 (99.4%) and T.

Paradesulfovibrio onnuriensis gen. nov., sp. nov., a chemolithoautotrophic sulfate-reducing bacterium isolated from the Onnuri vent field of the Indian Ocean and reclassification of Desulfovibrio senegalensis as Paradesulfovibrio senegalensis comb. nov.

An anaerobic, rod-shaped, mesophilic, chemolithoautotrophic, sulfate-reducing bacterial strain IOR2 was isolated from a newly found deep-sea hydrothermal vent (OVF, Onnuri Vent Field) area in the central Indian Ocean ridge (11°24'88″ S 66°25'42″ E, 2021 m water depth). The 16S rRNA gene sequence analysis revealed that the strain IOR2 was most closely related to Desulfovibrio senegalensis BLaC1 (96.7%).

sp. nov., a mesophilic bacterium isolated from a marine sponge from Chuuk lagoon, Federated States of Micronesia, and emended description of the genus .

A mesophilic, straight-rod-shaped, non-flagellated bacterium, designated MEBiC05444, was isolated from a marine sponge collected from Chuuk lagoon, Federated States of Micronesia. The strain was Gram-negative, catalase- and oxidase-positive, and facultative anaerobic. The isolate aerobically grew at 8-38 °C (optimum, 24-32 °C), pH 4.

Isolation, cultivation, and genome analysis of proteorhodopsin-containing SAR116-clade strain Candidatus Puniceispirillum marinum IMCC1322.

Strain IMCC1322 was isolated from a surface water sample from the East Sea of Korea. Based on 16S rRNA analysis, IMCC1322 was found to belong to the OCS28 sub-clade of SAR116. The cells appeared as short vibrioids in logarithmic-phase culture, and elongated spirals during incubation with mitomycin or in aged culture.

Comparative evaluation of bioremediation techniques on oil contaminated sediments in long-term recovery of benthic community health.

While various bioremediation techniques have been widely used at oil spill sites, the in situ efficiency of such techniques on recovering the benthic communities in intertidal areas has not been quantified. Here, the performance of several bioremediation tools such as emulsifiers, multi-enzyme liquid (MEL), microbes, and rice-straw was evaluated by a 90-days semi-field experiment, particularly targeting recovery of benthic community. Temporal efficiency in the removal of sedimentary total petroleum hydrocarbons (TPH), reduction of residual toxicity, and recovery of bacterial diversity, microalgal growth, and benthic production was comprehensively determined.

Anaerosacchariphilus polymeriproducens gen. nov., sp. nov., an anaerobic bacterium isolated from a salt field.

A Gram-stain-negative oval-rod-shaped, spore-forming anaerobic bacterium, designated as strain MCWD5, was isolated from sediment of a salt pond in the Republic of Korea (35° 7' 18″ N 126° 19' 4″ E). The 16S rRNA gene sequence analysis revealed that strain MCWD5 had low similarity values to members in the family Lachnospiraceae, such as Robinsoniella peoriensis PPC31 (94.8 %), Ruminococcusgauvreauii CCRI-16110 (94.

Roseithermus sacchariphilus gen. nov., sp. nov. and proposal of Salisaetaceae fam. nov., representing new family in the order Rhodothermales.

A novel bacterium with cells that were pinkish-cream-coloured, aerobic, rod-shaped, 0.62-1.00 µm wide and 2.

Flavobacterium sediminis sp. nov., a starch-degrading bacterium isolated from tidal flat sediment.

A yellow-pigmented bacterium with the ability to degrade starch, designated MEBiC07310, was isolated from tidal flat sediment collected in Taean County, Republic of Korea. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that strain MEBiC07310 was affiliated with the genus Flavobacterium in the phylum Bacteroidetes and showed that the strain was most closely related to Flavobacterium haoranii LQY-7 (96.8 % similarity), followed by Flavobacterium indicum GPTSA 100-9 (95.

Corallibacterium pacifica gen. nov., sp. nov., a Novel Bacterium of the Family Vibrionaceae Isolated from Hard Coral.

A gram-negative, rod-shaped, motile, oxidase- and catalase-positive, non-pigmented marine bacterium, designated strain OS-11M-2, was isolated from a coral sample collected from the Osakura coastal area in Micronesia. Phylogenetic analysis based on 16S ribosomal RNA (rRNA) gene sequences indicated that strain OS-11M-2 is a member of the family Vibrionaceae, its closest neighbors being Photobacterium damselae subsp. piscicida NCIMB 2058 (94.