• Korean Chemical Engineering Research
• /
• v.58 no.4
• /
• pp.514-523
• /
• 2020

Plants are exposed to various types of stresses in their surroundings, and stress-resistant and regulatory proteins are produced as defense mechanisms. Abscisic acid is well known for its important role in stress signals as a phytohormone and is also involved in the physiological reactions of plants such as leaf senescence and seed dormancy. In particular, it has been found to perform a variety of functions in other biological systems, such as animals and microalgae, not plants. In this review, the biosynthesis and signaling process of abscisic acid and its function were investigated and the future prospects for the industrial application of abscisic acid in various biotechnologies, including agriculture, biomedical and industrial biotechnology, have been proposed based on study of emerging applications such as increased crop yields, disease treatment development and bioenergy production.

• Journal of Plant Biotechnology
• /
• v.43 no.1
• /
• pp.99-103
• /
• 2016

In perennial ginseng plantations, the effective control of various diseases is one of the most critical factors for increasing yields. Enhancing the resistance to disease through induced systemic resistance (ISR) and anti-microbial activity of beneficial soil bacteria, is currently considered to be a potential promising approach to integrate pathogen management for sustainable agriculture. However, the effective in vitro culture systems for testing ISR in ginseng plants have been rarely reported. In this study, I have successfully developed an in vitro germ-free culture system of Panax ginseng seedling for diverse purposes. With this useful system, we also tested BTH-induced priming effects against Botrytis cinerea and Colletotrichum panacicola. Compared to the drain method for enhancing ISR effects to ginseng seedlings, the direct method of spraying leaves somewhat increased the defense activity to these major fungal pathogens. Consistently, the expression of pathogen related PgPR10 and PgCAT were greatly and rapidly enhanced in the BTH-treated ginseng seedlings by treatment with C. panacicola. Our results revealed that the in vitro culture system can be used for developing eco-friendly and versatile bio-control agents for harmful diseases in ginseng cultivation.

• The Journal of the Convergence on Culture Technology
• /
• v.4 no.4
• /
• pp.167-171
• /
• 2018

Alstroemeria (Alstroemeriaceae) is one of the most important cut flowers in international market. But, its characteristics such as low multiplication rates, time consuming process and high risk of carrying viral disease, in vitro propagation techniques based on rhizome meristems culture have been developed. In this study, we conducted this experiment to investigate the effect of hormones and gelling agents on the growth for Alstroemeria in vitro tissue culture. The highest number of shoot and root formation were obtained from the growth medium contains BA 1.0 mg/L and NAA 0.1 mg/L. When 0.25% of gelrite was added up to 50% shoots and roots length were observed compared to other gelling agents. Using these results, it is expected to contribute to the establishment of mass production systems in Alstroemeria.

• Journal of Digital Convergence
• /
• v.17 no.8
• /
• pp.257-264
• /
• 2019

This study was conducted to investigate the effect of 70% ethanol extract (DR) on the mast cell-mediated allergic contact dermatitis induced by dinitrofluorobenzene in BALB / c mice, which affects the cell activity by antigen in RBL-2H3 mast cells Respectively. The ethanol extracts of RBL-2H3 cells activated by DNP-HSA and anti-DNP IgE antibodies inhibited the secretion of ${\beta}$-hexosaminidase, histamine, and IL-4 and $TNF-{\alpha}$ Production was suppressed. In the DNFB-induced contact allergic dermatitis animal model, treatment with ethanol extract reduced ear swelling and inhibited serum histamine and IL-4 secretion, and DR treatment effectively prevented mast cell infiltration in dermatitis-induced areas. As a result, the ethanol extract may be used as a therapeutic agent for mast cell-mediated allergic diseases such as atopic dermatitis.

• Korean Journal of Organic Agriculture
• /
• v.30 no.1
• /
• pp.75-87
• /
• 2022

Reflux esophagitis (RE) is a gastroesophageal reflux disease (GERD) caused by repeated reflux of gastric acid into the esophagus. The present study investigated the protective effect of natural mineral water on esophageal injury induced by gastric acid reflux. The cytotoxicity of mineral water was confirmed using Cell viability, proliferation and cytotoxicity assay kit. The protective effect of mineral water on esophageal injury was investigated in RE rat model. The results showed that no cytotoxicity of mineral water was observed in RAW264.7 cells. Mineral water decreased the ratio of esophageal damage, inhibited the increase of inflammatory-protein expression levels and increased the mucosa protection and tight junction proteins expression level in RE control rat. The results suggest that mineral water may have the potential to protect esophageal damage caused by gastric acid reflux and the potential to alleviate reflux esophagitis.

• Korean Journal of Medicinal Crop Science
• /
• v.14 no.1
• /
• pp.1-7
• /
• 2006

This research was conducted to investigate the possibilities of usage of germinated-buckwheat (Fagopyrum esculentum $M{\ddot{o}}ench$) by examining antioxidative, antimicrobial and cytotoxic effects of extracts from different germinated root length of buckwheat. Antioxidant activity $(RC_{50})$ was shown higher in extracts of non-germinated seed $(50.41\;{\mu}g/mL)$ and root length 10 mm $(80.57\;{\mu}g/mL)$, 2 mm $(93.77\;{\mu}g/mL)$, 5 mm $(107.09\;{\mu}g/mL)$ than BHT $(163.96\;{\mu}g/mL)$ as a synthetic antioxidant. In antimicrobial activity, non-germinated and germinated seeds were formed inhibitory zone against S. aureus $(4{\sim}10\;mm)$, P. aeruginosa $(2{\sim}9\;mm)$ at the concentrations of $10{\sim}40\;mg/mL$ but B. subtilis, E. coli and S. typhimurium were not apparent antimicrobial activity. Extracts of germinated seed also decreased their antimicrobial activity compared to non-germinated seed extract. In addition, the growth of Calu-6 was inhibited of both 5 mm root length germinated and non-germinated seeds $(800\;{\mu}g/mL)$ as 95.12% and 87.15%, respectively, but these did not show any influence on cytotoxic effect against MCF-7 and Caco-2 cell lines. Extracts of 2 mm and 5 mm germinated seeds were also inhibited against Calu-6 and SNU-601 cell lines.

• Journal of Life Science
• /
• v.31 no.7
• /
• pp.609-616
• /
• 2021

Bacterial soft rot, caused by Pectobacterium carotovorum subsp. carotovorum (Pcc), is one of the destructive diseases of radish (Raphanus sativus) in Asian countries. The objective of this study was to establish an efficient bioassay method for the evaluation of bacterial soft rot resistance in commercial radish cultivars. First, an efficient bioassay method for examining resistance to bacterial soft rot in commercial radish cultivars was investigated. Six commercial radish cultivars were tested under various conditions: two temperatures (25℃ and 30℃), three inoculations methods (drenching, spraying, and root dipping), and two growth stages (two- and four-leaf stages). The results suggested that spraying with 1×10⁶ cfu/ml of bacterial inoculums during the four-leaf stage and incubating at 30℃ could be the most efficient screening method for bacterial soft rot resistance in commercial radish cultivars. Second, we investigated the degree of resistance of 41 commercial radish cultivars to five Pcc isolates, namely KACC 10225, KACC 10343, KACC 10421, KACC 10458, and KACC 13953. KACC 10421 had the strongest susceptibility in terms of moderately resistant disease response to bacterial soft rot. Out of the 41 radish cultivars, 13 were moderately resistant to this pathogen, whereas 28 were susceptible. The moderately resistant radish cultivars in this investigation could serve as resistance donors in the breeding of soft rot resistance or could be used to determine varietal improvement for direct use by breeders, scientists, farmers, researchers, and end customers.

• Analytical Science and Technology
• /
• v.32 no.6
• /
• pp.262-270
• /
• 2019

The stable isotopic composition of bone collagen plays an important role in reconstructing palaeodiet, nutrition, palaeoenvironment and their lifestyle. This is the first case in extracting palaeodietary information and breastfeeding pattern of Goryeo people using stable isotope analysis due to the lack of human remains in this period. We analyzed human bone collagen excavated from Gyeongju Donggung palace and Wolji pond No.3. The average values of δ¹³C and δ¹⁵N are as follows: (δ¹³C(‰) = -19.5 ± 0.9‰, δ¹⁵N(‰) = 11.1 ± 1.1 ‰, (n = 4). Stable carbon isotope values shows a mainly C₃ based diet such as rice and barley. Stable nitrogen isotope results implies the protein sources attributed to terrestrial animals. There are various age groups in this study, which are adult, child and infant. Two individuals within early childhood age ranges (< 3 years) shows more elevated δ¹⁵N values than that of adult and this result implies the continuation of breastfeeding in this group until the age of 3. The results provide new insight into the breastfeeding pattern of Goryeo people, where breastfeeding and weaning practices have important implication for fertility, population dynamics, migration pattern and disease.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2011.10a
• /
• pp.8-8
• /
• 2011

인류는 자연으로부터 식량과 질병 치료를 위하여 자연스럽게 약초를 얻을 수 있었다. 약 6만 년 전 네안데르탈인의 무덤에서 오늘날 향료로 쓰이는 약초가 발견 될 정도로 인류가 약초를 이용한 역사는 오래 되었다. 약초는 난치병, 노화, 성인병 등 현대의학에서 미비점을 보완하는 대체의약 산업의 원료이자 새로운 생물자원의 보고로서, 그 중요성이 커지고 있다. 새로운 생물자원 소재로 약초는 약용성분을 함유한 식물자원의 확보 및 개발 등 고부가산업의 소재로 선진국에서 연구개발의 경쟁이 치열하며, 약초산업은 천연소재 신약과 기능성 식품, 화장품, 생활용품 등으로 확대되고 있다. 의약품 분야에서는 새로운 시대의 중요한 생명산업으로서 약초는 한약뿐 아니라 신약 개발을 위한 소재로도 부각되고 있으며, 항암제인 택솔, 신종플루 치료제인 타미플루 등 천연물 약의 가능성은 이미 증명되었다. 식품 분야에서는 재배기술 발달과 웰빙 트렌드 속에서 약초는 신선채소와 기능성 식품으로 변신하고 있다. 한약재의 이미지를 벗어난 약초는 음료와 과자, 술 등으로 활용되고, 비빔밥 등 다양한 약선음식으로도 개발되고 있다. 산업소재의 활용분야에서는 약초는 특히 화장품 산업의 소재로 각광받고 있다. 이미 다양한 화장품 회사에서 한방화장품을 출시하여 세계 속으로 진출하고 있다. 또한 약초는 천연 색소이자 생활 용품의 소재로 활용되고 있는데, 약초를 활용한 염색약과 여성 생리대, 샴푸 등의 인기가 높다. 약초산업의 부가가치 증대를 위하여 한약재 위주의 약초산업을 천연물 신약, 기능성 식품, 화장품, 산업 소재 등 고부가가치 시장으로 확장시키고, 우리 약초 산업의 세계화를 추진해야 한다. 연구개발 투자 확대와 빠르게 변화하는 시장을 반영하여 연구 방향을 수립하고, 산학연 및 생산자단체 등과 새로운 약초 산업의 블루오션 창출을 위해 협력을 해야 할 것이다. 또한 약초의 생산기술 안정화를 통해 산업화 기반을 구축하여, 약초 공급의 안정화, 약초 생산 농가 소득 안정화가 필요하며, 마지막으로 변해가는 약초 산업의 트렌드에 부응할 수 있는 품질관리와 유통 질서 확립을 위한 정책과 제도의 선진화가 뒷받침 되어야 할 것이다.

• Microbiology and Biotechnology Letters
• /
• v.41 no.3
• /
• pp.292-299
• /
• 2013

In this study, we analyzed the changes in fungal populations of red-pepper fields employing eco-friendly farming methods, such as microbial agents and crop rotation, by using polymerase chain reactions coupled with denaturing gradient gel electrophoresis (PCR-DGGE). Primer specific for fungi were used to determine the contribution of domains to the microbial community. Analysis of planted and non-planted soil samples applying PCR-DGGE technology offered evaluation of long-term patterns in fungal species richness. To evaluate the stability of DGGE patterns from different soils, comparison of planted and non-planted soil samples were compared using PCR-DGGE. The number of DNA fragments obtained from all planted soil samples by DGGE separation was far greater (14 to 15 bands) than that of the non-planted soil samples (3 to 4 bands). In addition, 14 bands were observed from crop continuation soil treated with agrochemicals and 18 bands from crop rotation soil treated with microbial agents. The PCR-DGGE analysis suggests that the use of crop rotation and microbial agents benefits the fungal community more than crop continuation using agrochemicals. These results indicate that crop rotation with microbial agents was better able to support beneficial organisms, enable more effective biological control and maintain a healthier balance of nutrients, organic matter and microorganisms.