A5100384963- Plant-Microbe Interactions and Immunity
- Plant Pathogenic Bacteria Studies
- Insect Resistance and Genetics
- Nematode management and characterization studies
- Studies on Chitinases and Chitosanases
- Microbial Natural Products and Biosynthesis
- Entomopathogenic Microorganisms in Pest Control
- Plant Pathogens and Fungal Diseases
- Insect and Pesticide Research
- Insect-Plant Interactions and Control
- Catalytic Cross-Coupling Reactions
- Catalytic Alkyne Reactions
- Catalytic C–H Functionalization Methods
- Research on scale insects
- Influenza Virus Research Studies
- Fungal Biology and Applications
- Insect symbiosis and bacterial influences
- Pineapple and bromelain studies
- Transgenic Plants and Applications
- Genomics, phytochemicals, and oxidative stress
- Insect and Arachnid Ecology and Behavior
- Plant Disease Management Techniques
- Antimicrobial Peptides and Activities
- Phytochemistry and Biological Activities
- Bacterial biofilms and quorum sensing
Bank of Korea
2023
Korea Research Institute of Bioscience and Biotechnology
2023
Chonnam National University
2010-2021
Chonnam National University Hospital
2014
National Institute of Agricultural Science and Technology
2010
Microorganisms capable of growth on oils are potential sources biopesticides, as they produce complex molecules such biosurfactants and lipopeptides. These have antimicrobial activity against plant pathogens, but few data available their insecticidal activity. The present study describes the a rhamnolipid isolated from diesel oil-degrading Pseudomonas sp. EP-3 (EP-3). treatment cell-free supernatants grown glucose-mineral medium for 96 h led to > 80% mortality aphids (Myzus persicae) within...
Restricted usage of chemical nematicides has led to development environmentally safe alternatives. A culture filtrate Aspergillus niger F22 was highly active against Meloidogyne incognita with marked mortality second-stage juveniles (J2s) and inhibition egg hatching. The nematicidal component identified as oxalic acid by organic analysis gas chromatography-mass spectroscopy (GC-MS). Exposure 2 mmol/L resulted in 100% juvenile at 1 day after treatment suppressed hatching 95.6% 7 days...
The antagonistic fungus Simplicillium lamellicola BCP has been developed as a microbial biopesticide that effectively controls the development of various plant diseases caused by both pathogenic bacteria and fungi. Antibacterial bioassay-directed fractionation was used to isolate mannosyl lipids from S. BCP, structures these compounds were elucidated using spectral analysis chemical degradation. Three novel characterized identified halymecins F G (3R,5R)-3-O-β-D-mannosyl-3,5-dihydrodecanoic...
Kimchi, a traditional fermented food regularly consumed in Korea, contains various types of antimicrobial compounds. Among the tested compounds present common spices used quercetin showed highest selectivity index against influenza A virus (IAV) H1N1. In this study, effect pretreatment and periodic treatment with IAV Madin–Darby canine kidney cells was observed. Compared to pretreatment, resulted significantly higher cell viability but lower relative expression PA gene total apoptosis death....
Abstract Biosurfactants have been used for crop protection in integrated pest management programs, as they are generally biodegradable and environmentally friendly. While screening insecticidal bacteria against green peach aphid, Myzus persicae , we found that a Bacillus isolate, Y9, exhibited strong surface tension activity produced metabolites. The metabolites with were extracted from the cell‐free supernatant of Y9 subjected to repetitive column chromatography preparative high performance...
Synthesis of terminal allenes via a copper-catalyzed decarboxylative coupling reaction was developed. Aryl alkynyl carboxylic acid, paraformaldehyde, and dicyclohexylamine were reacted with CuI (20 mol %) in diglyme at 100 °C for 2 h to produce the allene moderate good yields. The method showed functional group tolerance.
Summary C hromobacterium sp. strain C61 displays antifungal activities in vitro and has been used successfully for the biocontrol of plant diseases under field conditions. In this study, roles extracellular chitinase an compound produced by were investigated to elucidate their contributions biological control activity. The bacterium possessed a locus chi54 encoding chitinase, mutation eliminated production. Production enzyme expression transcript increased wild‐type when chitin was added...
Abstract BACKGROUND: Klebsiella oxytoca C1036 (C1036) causes induced systemic resistance (ISR) activity against the soft‐rot pathogen Pectobacterium carotovorum subsp. SCC1 (SCC1). However, microbial metabolites from involved in ISR remain unknown. The present study was performed to identify an ISR‐related metabolite produced by C1036. RESULTS: supernatants of cultures grown on Luria‐Bertani medium were subjected solvent extraction, repeated column chromatography and preparative liquid for...
Abstract Myzus persicae is an important insect pest that reduces crop production worldwide. The use of pesticides for aphid control has generated much concern related to resistance and undesirable environmental effects. In effort discover new alternatives counter M. , we found Pseudomonas isolate DJ15 produced insecticidal metabolites. To the metabolites, a cell‐free supernatant was extracted subjected bioassay‐guided chromatography. Based on structures elucidated in instrumental analyses,...
Chromobacterium sp. strain C61 has strong biocontrol activity; however, the genetic and biochemical determinants of its plant disease suppression activity are not well understood. Here, we report identification characterization two new activity. Transposon mutagenesis was used to identify mutants that were deficient in fungal suppression. One these had an insertion a homologue depD, structural gene dep operon, encodes protein involved non-ribosomal peptide synthesis. In second mutant, luxI...
Biosurfactant immunomodulatory activities in mammals, nematodes, and plants have been investigated. However, the immune activation property of biosurfactants insects has not reported. Therefore, here, we studied defense response triggered by lipopeptides (fengycin iturin A), glycolipids (rhamnolipid), cyclic polypeptides (bacitracin) coleopteran insect, mealworm Tenebrio molitor. The vitro antimicrobial against Gram-positive (Staphylococcus aureus) Gram-negative (Escherichia coli) bacteria...
The oral consumption of capsicum has been reported to increase interleukin (IL)-2 and interferon (IFN)-γ production in Peyer's patches (PP); however, the active components responsible for these effects have not completely identified. beneficial biological green peppers cultivated under environmentally friendly farming conditions (ECP), without use chemical pesticides, rarely compared with those conventional (CCP). Oral administration ECP extract significantly induced IL-2 IFN-γ concanavalin...
Because bacterial isolates from only a few genera have been developed commercially as biopesticides, discovery and characterization of novel strains will be key to market expansion. Our previous screen using plant bioassays identified 24 biocontrol representing 12 different genera. In this study, we characterized the 3 showing best activities. The were Pantoea dispersa WCU35, Proteus myxofaciens WCU244, Exiguobacterium acetylicum WCU292 based on 16S rRNA sequence analysis. showed...
The yellow-legged hornet, <italic>Vespa velutina nigrithorax</italic> (Hymenoptera: Vespidae), which invaded South Korea in 2003 caused a great damage to honeybee industry. In this study, we tested the efficacy of new attractant and on-the-market-attractant apiaries located Jeonnam area. As test result, it turned out that <italic>V. velutina</italic> was most dominant species. newly developed showed substantially high capture statistically supported (<italic>P</italic> < 0.01). On other...
The growing demands for organic and sustainable agricultural plant foods can be attributed largely to concerns regarding environmental protection food safety, along with a broader interest in t...
Schisandra chinensis (S. chinensis) is a deciduous broad-leaved cave plant belonging to the Schisandraceae family and widely distributed in East Asia including Korea, Japan, China, Taiwan.It has been reported that main components contained S. include lignan compounds triterpenoid compounds.To distinguish characteristics of by production region discriminant was established performing metabolite profiling principal component analysis, multivariate statistical analysis technique.As result, 16...