• Journal of the Korean Applied Science and Technology
• /
• v.41 no.2
• /
• pp.159-171
• /
• 2024

This study confirmed the antioxidant activity and antimicrobial efficacy and formulation stability for the effectiveness experiment of Rumex crispus. L root extract. For antioxidant activity, DPPH radical scavenging, FRAP activity, ABTS+ radical scavenging, and SOD-like activity were performed. Antimicrobial activity was evaluated for Staphylococcus epidermidis, Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Candida albicans strains. In addition, skin containing Rumex crispus. L root extract is checked over time for pH, temperature, and daylight for 21 days. As a result of antioxidant evaluation, it was confirmed that the activity increased in a concentration-dependent manner at a concentration of 0.0625-1 mg/mL. The clear zones of each bacterium at 100mg/mL concentrations were 10.45±0.34, 9.77±0.59, 9.92±0.22, and 10.08±0.12, which were superior to the control group Methyl paraben, and the antibacterial power of S. aureus and E. coli was confirmed at 100mg/mL concentration for MIC. There was little change in absorbance when the pH of the skin was 4.0, 6.0, and 7.0 and At 4℃, 25℃, and 40℃, it was discolored as the temperature increased. It was also observed that discoloration occurred when exposed to daylight. This is presumed to be able to prevent discoloration when it is shielded and stored at low temperatures. When the results of this study are summarized, Rumex crispus. L root extract is considered to have high value in use as a cosmetic raw material that can expect antioxidant and antibacterial activities.

• Korean Journal of Medicinal Crop Science
• /
• v.4 no.4
• /
• pp.271-276
• /
• 1996

This studies were conducted to basic information on growth characteristics and root yield in progeny the derived from different bolting years and to establish optimum seed production time in Angelica gigas. Plant height of early and mid-growing stages had decreased with each year increase in bolting year, but showed no significance in late growing stage at different bolting years. Root charac­teristics including root length, root diameter and dry root weight was slightly good and it had high root/ shoot ratio in third year seed production. respectively. Bolting rate showed that first year seed 38.1%, second year seed 10.4% and third year seed 1.2%, respectively. Therefore, optimum seed production time revealed third year seed for reduce bolting rate. Root yield at different bolting years showed average 1,690kg per hectare as fresh root weight on first year seed, 2,860kg on second year and 2,940kg on third year seed, respectively. A significant positive correlation was appeared between bolting rate and plant height in mid-growing stage. On the other hard, there was highly significant negative correlation between bolting rate and root yield.

• Korean Journal of Organic Agriculture
• /
• v.24 no.3
• /
• pp.413-425
• /
• 2016

Potassium (K) is an element essential for plant growth. This study was aimed to examine the effects of three formulations of potash feldspar, powder, sand, and granule type on the growth of radish and beet in organic farming. 0.1% three formulations of potash feldspar were treated on the soil before transplanting 15 days-old seedlings of radish and beet in greenhouse. The results showed that all kinds of potash feldspar significantly increased shoot and root growth, and soluble solid contents excepted for root hardness in radish and beet. Among them, the powder type of potash feldspar was the most effective on foliage and root growth of radish and beet. Based on the results, it was confirmed that 0.1% potash feldspar treated in the rhizosphere of radish and beet can promote the growth of them.

• Research in Plant Disease
• /
• v.16 no.3
• /
• pp.279-284
• /
• 2010

Clubroot caused by Plasmodiophora brassicae is a widespread disease that causes serious problems in many brassica growing areas. To establish more simple and reliable clubroot screening method of Chinese cabbage to P. brassicae using soil-drenching inoculation, the development of clubroot on Chinese cabbage according to several conditions such as soil type, inoculum concentration of P. brassicae GN-1 (race 9), plant growth stage and incubation period was studied. In a commercial horticulture nursery media soil (CNS), disease severity of the seedling according to inoculum concentration increased in a dose-dependent manner, but did not in mixture of CNS and upland soil (1:1, v/v). To facilitate and acquire precise result of resistance screening of Chinese cabbage to clubroot, 10-day-old seedlings should be inoculated by drenching the spore suspension of P. brassicae to give inoculum density of $4.0{\times}10^8$ spores/pot. To develop the disease, the inoculated seedlings were incubated in a growth chamber at $20^{\circ}C$ for 3 days, and then cultivated in a greenhouse ($25{\pm}5^{\circ}C$) for five weeks. Under the optimum conditions, 25 clubroot-resistant (CR) and 3 clubroot-susceptible (CS) cultivars were tested for resistance to P. brassicae. All CR cultivars showed very clear resistance response, on the other hand all CS cultivars severly infected with the pathogen. The results suggest that this method is efficient screening method of Chinese cabbage for resistance to clubroot disease.

• Research in Plant Disease
• /
• v.20 no.2
• /
• pp.119-125
• /
• 2014

Root-knot nematodes represent a significant problem in cucumber, causing reduction in yield and quality. To develop screening methods for resistance of cucumber to root-knot nematode Meloidogyne incognita, development of root-knot nematode of four cucumber cultivars ('Dragonsamchuk', 'Asiastrike', 'Nebakja' and 'Hanelbakdadaki') according to several conditions such as inoculum concentration, plant growth stage and transplanting period was investigated by the number of galls and egg masses produced in each seedling 45 days after inoculation. There was no difference in galls and egg masses according to the tested condition except for inoculum concentration. Reproduction of the nematode on all the tested cultivars according to inoculum concentration increased in a dose-dependent manner. On the basis of the result, the optimum conditions for root-knot development on the cultivars is to transplant period of 1 week, inoculum concentration of 5,000 eggs/plant and plant growth stage of 3-week-old in a greenhouse ($25{\pm}5^{\circ}C$). In addition, under optimum conditions, resistance of 45 commercial cucumber cultivars was evaluated. One rootstock cultivar, Union was moderately resistant to the root-knot nematode. However, no significant difference was in the resistance of the others cultivar. According to the result, we suggest an efficient screening method for new resistant cucumber to the root-knot nematode, M. incognita.

• Proceedings of the Korean Society of Crop Science Conference
• /
• 1985.10a
• /
• pp.8-8
• /
• 1985

• Proceedings of the Korean Society of Crop Science Conference
• /
• 2020.11a
• /
• pp.54-54
• /
• 2020

• Korean journal of applied entomology
• /
• v.45 no.3 s.144
• /
• pp.339-346
• /
• 2006

Total 90 species of medicinal plants were surveyed to see if they have any suppressive effects on the dinsity of M hapla at the exhibition field in the Chinan medicinal herbs experiment station. In 70 species including Achyranthes japonica, root-knot and/or egg sac of M. hapla was not found and these plants were planted in C. lanceolata field to check the degree of M. hapla infection. In 26 species including A. japonica, M. hapla infection was not observed. Simultaneously, 30 species were planted in pots to find out degree of infection by M. hapla. Dianthus chinensis, Rudbeckia bicolor, Sedum kantschaticum, Ricinus communis, Anemarrhena asphodeloides, Malva verticillate, Chelidonium majus, Sesamum indicum, Agrimonia pilosa, Geum aleppicum, Sanguisorba officinalis and Scrophularia buergeriana were free from infection. While the number of galls and density of M. hapla in soil were higher to high innoculation density, and the growth of C. lanceolata was rower.

• Journal of Korea Foresty Energy
• /
• v.21 no.3
• /
• pp.28-33
• /
• 2002

This study was carried out to develop the technique for the production of high quality container seedlings of Comus controversa Hemsley. The seedlings were grown on the medium of peatmoss : perlite : vermiculite (1:1:1, v/v) in plastic net container and no-net plastic container as control for five months in the PE house. The seedlings grown in the plastic net container showed better root collar diameter growth, better development of long and fine roots, more increment of dry mass of roots and shoots than those grown in the no-net container. But the height growth of the seedlings in both container was similar. In particular the seedlings grown in plastic net container had no spiraling roots which were always observed in the control container seedlings. This result was induced by air-root pruning effect from the plastic net container.

• Proceedings of the Korean Society for Bio-Environment Control Conference
• /
• 2003.04a
• /
• pp.24-29
• /
• 2003

시설참외 주산지에서는 연작함으로써 뿌리혹선충을 비롯한 각종 토양전염성 병해충의 피해가 많아지고 염류가 집적되는 등 재배상 많은 문제점이 발생되고 있다. 특히 참외를 장기재배하는 농가가 많은 성주 등 경북지역에서는 뿌리혹선충으로 인해 생육이 불량하고, 과실의 착과율이 떨어지는 등 피해가 발생되면 영양결핍증상으로 오인, 계속 추비를 시용함으로써 토양의 염류집적을 가중시키고 있다. (중략)