A5060943516- Microbial Community Ecology and Physiology
- Genomics and Phylogenetic Studies
- Bacteriophages and microbial interactions
- Polar Research and Ecology
- Methane Hydrates and Related Phenomena
- Aquaculture disease management and microbiota
- Marine and coastal ecosystems
- Environmental DNA in Biodiversity Studies
- Arctic and Antarctic ice dynamics
- Enzyme Production and Characterization
- Protist diversity and phylogeny
- Plant Virus Research Studies
- Cryospheric studies and observations
- Climate change and permafrost
- Identification and Quantification in Food
- Geology and Paleoclimatology Research
- Respiratory viral infections research
- Molecular Biology Techniques and Applications
- Actinomycetales infections and treatment
- Indoor Air Quality and Microbial Exposure
- Atmospheric chemistry and aerosols
- Isotope Analysis in Ecology
- Marine Biology and Ecology Research
- Pharmaceutical and Antibiotic Environmental Impacts
- Plant Disease Resistance and Genetics
Seoul National University
2009-2025
Korea Polar Research Institute
2012-2020
Korea Institute of Ocean Science and Technology
2014-2016
Ice nucleating particles (INPs) are vital for ice initiation in, and precipitation from, mixed-phase clouds. A source of INPs from oceans within sea spray aerosol (SSA) emissions has been suggested in previous studies but remained unconfirmed. Here, we show that emitted using real wave breaking a laboratory flume to produce SSA. The number concentrations laboratory-generated SSA, when normalized typical total the marine boundary layer, agree well with measurements diverse regions over...
The subarctic region is highly responsive and vulnerable to climate change. Understanding the structure of soil microbial communities essential for predicting response environment To determine composition bacterial community its relationship with properties, we investigated properties surface from moist acidic tussock tundra in Council, Alaska. We collected 70 samples 25-m intervals between sampling points 0–10 cm 10–20 depths. was analyzed by pyrosequencing 16S rRNA genes, following were...
This study investigated the abundance and diversity of antibiotic resistance genes (ARGs) composition bacterial communities along a transect covering western Pacific Ocean (36°N) to Southern (74°S) using Korean icebreaker R/V Araon (total cruise distance: 14,942 km). The relative abundances ARGs bacteria were assessed with quantitative PCR next generation sequencing, respectively. absolute was 3.0 × 106 ± 1.6 copies/mL in Ocean, highest value (7.8 copies/mL) recorded at station Tasman Sea...
A slightly curved, rod-shaped marine bacterium, designated strain CL-S1(T), was isolated from near Dokdo, an island in the East Sea, Korea. Cells were Gram-negative and grew well under either aerobic or microaerobic conditions. Analyses of 16S rRNA gyrA gene sequences CL-S1(T) revealed affiliation with genus Arcobacter within class Epsilonproteobacteria. Phylogenetic analyses based on showed that formed a robust clade halophilus LA31B(T), sequence similarities 96.1 88.2 %, respectively....
Modern studies on marine airborne prokaryotes over open seas have been rare. Here, to understand their distribution and composition, aerosol as well surface seawater samples were collected at three sites in the East Sea. The abundance of was 0.7–1.2 × 105 cells m−3. Partial sequences 16S rRNA gene from aerosols dominated by Gammaproteobacteria Bacteroidetes. Interestingly, numbers phylotypes bacteria comparable those coastal remote offshore sites. Over half bacterial operational taxonomic...
Candidate phylum Atribacteria JS1 lineage is one of the predominant bacterial groups in anoxic subseafloor sediments, especially organic-rich or gas hydrate-containing sediments. However, due to lack axenic culture representatives, metabolic potential and biogeochemical roles this have remained elusive. Here, we examined microbial communities marine sediments Ross Sea, Antarctica, found candidate was most abundant accounting for 9.8-40.8% with a single dominant operational taxonomic unit...
A Gram-negative, pink-coloured, rod-shaped, non-flagellated bacterium, designated CL-GP80(T), was isolated from a hypertrophic pond located within the campus of Seoul National University, Korea. Analysis its 16S rRNA gene sequence revealed that strain CL-GP80(T) belongs to family Sphingobacteriaceae and is closely related Pedobacter heparinus ATCC 13125(T) (95.8 % similarity) other members genus (90.8-95.3 similarity). Temperature pH ranges for growth were 5-33 degrees C 6-8, respectively....
A Gram-staining-negative, rod-shaped and non-motile bacterium, designated CL-SS4T, was isolated from crude-oil-contaminated seawater the west coast of Korea investigated by means a polyphasic taxonomic approach. Strain CL-SS4T grew optimally at 25–30 °C, pH 6.8–7.7 in presence 2–3 % sea salts. The major fatty acids were iso-C17 : 0 3-OH, iso-C15 1 G. isoprenoid quinone MK-6. DNA G+C content 50.7 mol%. Analysis 16S rRNA gene sequence strain revealed that it member genus Muricauda, sharing...
Two strictly aerobic, Gram-negative, rod-shaped bacteria containing photosynthesis-related genes, designated strains CL-SK44T and CL-JM1T, were isolated from a culture of the marine phytoplankton Cryptomonas sp. coastal seawater Korea, respectively. Phylogenetic analysis 16S rRNA gene sequences revealed that two related to members genera Thalassobius (95.3–96.7 % similarity), Pelagibaca (95.3–96.0 %) Donghicola (95.6 in family Rhodobacteraceae. However, novel did not form robust clade with...
Abstract. Terra Nova Bay in Antarctica is a formation region for high-salinity shelf water (HSSW), which major source of Antarctic Bottom Water. Here, we analyze spatiotemporal salinity variability with implications the local HSSW production. The variations Drygalski Basin and eastern near Crary Bank Ross Sea were investigated by analyzing hydrographic data from instrumented moorings, vessel-based profiles, available wind sea-ice products. Near-bed (∼660 m) (∼1200 increases each year...
The sources of primary and secondary aerosols in the Arctic are still poorly known. A number surface seawater samples—with varying degrees riverine sea ice influences—were used a spray generation chamber to test them for their potential produce (SSA) cloud condensation nuclei (CCN). Our interdisciplinary data showed that both salt organic matter (OM) significantly influenced SSA production. concentration coastal samples was negatively correlated with salinity positively OM tracers, including...
Abstract The bacterium, Acidovorax avenae ssp. causes several important plant diseases including bacterial stripe of rice, stalk rot corn, leaf blight oats, and red sugarcane millet. Although the organism is seed‐borne in no reliable seed assay available. A semiselective liquid medium based on d ‐sorbitol l ‐pyroglutamic acid (SP medium), two sets polymerase chain reaction (PCR) primers were designed for use a BIO‐PCR detection A. rice seeds. External primer set, Aaaf3 Aaar2, internal Aaaf5...
A Gram-negative, facultatively anaerobic strain with slightly curved and straight rod-shaped cells, CL-GR58(T), was isolated from coastal seawater (near Gori, Korea). Analyses of the 16S rRNA gene sequence revealed that CL-GR58(T) belonged to family Rhodospirillaceae Azospirillum lipoferum as its closest relative (gene similarity 90.9 %). Phylogenetic analyses sequences showed not associated any known genera in Rhodospirillaceae. The novel grew presence 1-10 % sea salts, optimally at 30-35...
ABSTRACT The Drygalski Ice Tongue presents an ~80 km long floating obstacle to alongshore flows in the Victoria Land coastal ocean region of Western Ross Sea. Here we use oceanographic data from near tongue explore interplay between glacier and local currents stratification. A vessel-based circuit glacier, recording temperature salinity profiles, reveals southwest corner be coldest most complex terms vertical structure. structure beneath surface warm, salty layer sustains a block very cold...
Two Gram-stain-negative, facultative anaerobic chemoheterotrophic, pink-coloured, rod-shaped and non-motile bacterial strains, PAMC 29128 29148T, were isolated from lichen. Phylogenetic analysis based on the 16S rRNA gene sequences revealed that strains 29148T belong to lichen-associated Rhizobiales -1 (LAR1), an uncultured phylogenetic lineage of order most closely related genera Methylocapsa (<93.9 %) Methylosinus (<93.8 %). The results phylogenomic genomic relatedness analyses also showed...
Gram-stain-negative, strictly aerobic, red-pink-coloured, rod-shaped and non-motile bacterial strains PAMC 29290, 29294T 29296 were isolated from marine surface sediment sampled in the East Siberian Sea 26553 26554T obtained an Antarctic lichen. Strains closely related to Hymenobacter artigasi (98.8 % 16S rRNA gene similarity), antarcticus (97.3 %) glaciei (96.9 %), showed high similarity ginsengisoli (97.0 rivuli (96.1 setariae (95.9 %). Genomic relatedness analyses that could be...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 229:1-10 (2002) - doi:10.3354/meps229001 Effects of thermal effluents from a power station on bacteria and heterotrophic nanoflagellates in coastal waters Dong H. Choi1, Jong S. Park1, Chung Y. Hwang1, Sung Huh2, Byung C. Cho1,* 1School Earth Environmental Sciences Research Institute Oceanography, Seoul...
A rod-shaped bacterium, designated CL-TF13T, was isolated from a tidal flat in Ganghwa, Korea. Analysis of the 16S rRNA gene sequence revealed an affiliation with genus Tenacibaculum. The similarities between CL-TF13T and type strains members Tenacibaculum were 94.2 to 97.4%. Cells motile by means gliding. Strain grew on solid medium as pale-yellow colonies irregular spreading edge. strain able grow NaCl at range 3-5%. They within temperature 5-40 degrees C pH 6-10. major fatty acids summed...
A 2-year-old intact female Golden Retriever presented due to rapidly progressing depression, ascites, dysuria, abdominal pain, and severe vaginal bleeding. At necropsy, the retroperitoneal space was expanded by multiple coalescing neoplastic nodules uterine wall thickened with poorly defined infiltrates. The urinary bladder markedly botryoid exhibiting exophytic growth into lumen. Metastases lung, liver, kidney, thoracic lymph nodes were also noted. Microscopically, genital tract masses...
Two novel Gram-negative bacterial strains, designated CL-GR15T and CL-GR35, were isolated from coastal seawater of the east coast Korea. Identical 16S rRNA gene sequences found in two it was that strains represented a distinct deep evolutionary lineage descent order Rhizobiales, clustered with yet-uncultured marine bacteria. This could not be associated any 12 known families Rhizobiales. The most closely related established genus Ochrobactrum (90.7–92.5 % sequence similarity) family...
Two Gram-negative, strictly aerobic bacterial strains, designated CL-AP6T and CL-AP22, were isolated from a culture of green alga, Pyramimonas gelidicola, established the Antarctic. Cells strains straight rods motile by means single polar flagellum. The grew with 0.5–8 % (w/v) NaCl (optimum, 1–2 %) at 4–33 °C 25 °C) pH 6.5–9.1 7.5–8.1). two shared 98.8 16S rRNA gene sequence similarity. Analysis sequences CL-AP22 revealed that they members genus Pseudomonas most closely related to...
A Gram-negative, strictly aerobic, slightly curved rod-shaped bacterial strain, designated CL-UU02(T), was isolated from coastal seawater off the east coast of Korea. 16S rRNA gene sequence analysis revealed a clear affiliation this novel strain with family Rhodospirillaceae. Strain CL-UU02(T) formed robust cluster type strains species genus Rhodovibrio at similarity levels 89.9-90.4 %. shared no more than 89 % other in able to grow presence 2-6 sea salts, and grew optimally 28-30 degrees C...