A5001117705- Microbial Community Ecology and Physiology
- Marine and coastal ecosystems
- Plant Virus Research Studies
- Bacteriophages and microbial interactions
- Algal biology and biofuel production
- Environmental Toxicology and Ecotoxicology
- Environmental DNA in Biodiversity Studies
- Aquaculture disease management and microbiota
- Seaweed-derived Bioactive Compounds
- Plant nutrient uptake and metabolism
- Biocrusts and Microbial Ecology
- Marine Biology and Ecology Research
- Identification and Quantification in Food
- Respiratory viral infections research
- Marine Bivalve and Aquaculture Studies
- Plant tissue culture and regeneration
- Virus-based gene therapy research
- Marine Biology and Environmental Chemistry
- Microplastics and Plastic Pollution
- Protist diversity and phylogeny
- Photosynthetic Processes and Mechanisms
- Aquatic Ecosystems and Phytoplankton Dynamics
- Food Quality and Safety Studies
- Biosensors and Analytical Detection
- Marine Toxins and Detection Methods
Korea Institute of Ocean Science and Technology
2015-2025
Korea University of Science and Technology
2015-2024
Sungkyunkwan University
1996-2023
Hankuk University of Foreign Studies
2015-2021
Korea Polar Research Institute
2020
Pukyong National University
2020
University of Science and Technology
2012-2013
Mokpo National University
2012
University of Regensburg
1999-2004
Leaf senescence is the final stage of leaf development in which nutrients invested are remobilized to other parts plant. Whereas accompanied by a decline cytokinin content, exogenous application cytokinins or an increase endogenous concentration delays and causes nutrient mobilization. The finding that extracellular invertase hexose transporters, as functionally linked enzymes apolasmic phloem unloading pathway, coinduced suggested delay mediated via effect on source-sink relations. This...
Certain photosynthetic marine organisms have evolved mechanisms to counteract UV-radiation by synthesizing UV-absorbing compounds, such as mycosporine-like amino acids (MAAs). In this study, MAAs were separated from the extracts of green alga Chlamydomonas hedleyi using HPLC and identified porphyra-334, shinorine, mycosporine-glycine (mycosporine-Gly), based on their retention times maximum absorption wavelengths. Furthermore, structures confirmed triple quadrupole MS/MS. Their roles...
Abstract Background In this study, we investigated transcription and enzyme level responses of mussels Mytilus galloprovincialis exposed to hypoxic conditions. Genes for catalase (CAT), cytochrome P450, glutathione S -transferase (GST), metallothionein, superoxide dismutase (SOD), c oxidase subunit 1 (COX-1), NADH dehydrogenase 2 were selected study. Transcriptional changes in hypoxia 24 48 h compared control maintained at normal oxygen levels. Activities CAT, GST, SOD enzymes, lipid...
High-resolution 16S rRNA tag pyrosequencing was used to obtain seasonal snapshots of the bacterial diversity and community structure at two locations in Gosung Bay (South Sea, Korea) over a one year period. Seasonal sampling from water column each site revealed highly diverse communities containing up 900 estimated Operational Taxonomic Units (OTUs). The Alphaproteobacteria Gammaproteobacteria were most abundant groups, frequently recorded OTUs members Pelagibacter Glaciecola. In particular,...
Metastasis is the principal cause of cancer death and occurs through multiple, complex processes that involve concerted action many genes. A number studies have indicated Fragile Histidine Triad (FHIT) gene product, FHIT, functions as a tumor suppressor in variety common human cancers. Although there are suggestions role for FHIT loss progression various cancers, such metastasis has not been defined. Here, via vivo vitro assays, we reveal enforced expression significantly suppresses...
Among begomovirus species, tomato leaf curl New Delhi virus (ToLCNDV) is significant and stands out as a mechanically transmissible bipartite originating from the Old World. However, mechanisms underlying mechanical transmission of different ToLCNDV strains remain understudied, their natural occurs via insect vectors. In this study, we investigated transmissibility two ToLCNDVs, one Italy another Pakistan, in host plants. Several cucurbit species were screened, symptom differences between...
To find out and compare the in vitro antioxidant tyrosinase inhibitory activities of two species mangrove plants. Mangrove samples were harvested at shoreline on island Weno, Chuuk State Micronesia. The phenol content, activity (based DPPH-free radical scavenging) different tissues (leaves, barks roots) Rhizophora stylosa (R. stylosa) Sonneratia alba (S. alba), collected from Weno. Total content ranged 4.87 to 11.96 mg per g freeze dried samples. highest was observed R. bark (85.5%). found...
To screen the fatty acid (FA) composition of 20 marine microalgae species, including seven Diophyceae, six Bacillariophyceae, four Chlorophyceae, two Haptophyceae and one Raphidophyceae species.Microalgal cells cultured at Korea Institute Ocean Science & Technology were harvested during late exponential growth phase FA analyzed.The was species-specific. For example, different species Dinophyceae composed primarily C14:0, C16:0, C18:0, C20:4n-6, C20:5n-3 C22:6n-3, while C16:1, C22:6n-3...
Characterizing ecological relationships between viruses, bacteria and phytoplankton in the ocean is critical to understanding ecosystem; however, these are infrequently investigated together. To understand dynamics of microbial communities environmental factors harmful algal blooms (HABs), we examined during Akashiwo sanguinea HABs Jangmok coastal waters South Korea by metagenomics. Specific bacterial species showed complex synergistic antagonistic with A. bloom. The endoparasitic...
Nucleocytoplasmic large DNA viruses (NCLDVs) infect various marine eukaryotes. However, little is known about NCLDV diversity and their relationships with eukaryotic hosts in environments, the elucidation of which will advance current understanding ecosystems. This study characterizes interplay between NCLDVs plankton community (EPC) sub-Arctic area using metagenomics metabarcoding to investigate EPC, respectively, Kongsfjorden ecosystem Svalbard (Norway) April June 2018. Gyrodinium...
Marine virus diversity and their relationships with hosts in the marine environment remain unclear. This study investigated co-occurrence of DNA bacteriophages (phages) bacteria sub-Arctic area Kongsfjorden Bay Svalbard (Norway) April June 2018 using metagenomics tools. Of viruses identified, 48-81% were families
Viruses are the most abundant biological entities in oceans, and account for a significant amount of genetic diversity marine ecosystems. However, there is little detailed information about biodiversity viruses environments. Rapid advances metagenomics have enabled identification previously unknown viruses. We performed metagenomic profiling seawater samples collected at 6 sites Goseong Bay (South Sea, Korea) during spring, summer, autumn, winter 2014. The results indicated presence highly...
We investigated the dynamics of bacterial composition and metabolic function within Akashiwo sanguinea bloom using a 100-L indoor microcosm metagenomic next-generation sequencing. found that community was classified into three groups at 54% similarity. Group I associated with "during A. stage" mainly consisted Alphaproteobacteria, Flavobacteriia Gammaproteobacteria. Meanwhile, II III were "late bloom/decline stage to post-bloom decreased Gammaproteobacteria in these stages. Upon termination...