• 한국작물학회지
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• 제25권3호
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• pp.63-67
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• 1980

인삼의 재래종에 대해서 유용형질과 관계가 있는 가시 Marker gene을 탐색하고, 선발을 용역하게 할수 있는 육종의 기초자료를 얻고저 년생별 각종 농경형질간의 상관관계를 조사하였던 바 그 결과를 요약하면 다음과 같다. 1. 형질상호간의 상관관계는 년생에 따라 다소 차이가 있었으나 경직경, 엽중, 경중은 각년생 공히 거의 모든 형질과 고도의 유의성이 있는 정(+) 상관을 보였다. 2. 각년생차에 관계없이 수량형질인 근중과 상관이 높았던 지상부형질은 경직경, 엽중, 엽폭, 장엽수, 소엽수, 엽중, 경중이었으며, 이들은 모두 정(+)상관을 보였다. 3. 따라서 경직경이 굵고, 엽면적이 넓고, 엽수가 많은 것이 다수성일 것으로 사료됨으로 경직경과 엽면적 및 엽수를 표식형질로 활용, 선발하는 것이 효과적일 것으로 생각된다.

• The Korean Journal of Ecology
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• 제22권2호
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• pp.85-88
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• 1999

Aqueous and dichloromethane (DCM) extracts of leaves, root bark and inflorescences of Parthenium hysterophorus L. at various concentrations were used to quantify its allelopathic potential against Indigofera tinctoria, Amaranthus viridis, A. gangeticus, Phaseolus mungo (cv. CO 1), Sorghum vulgare (cv. SPT- 462). Pennisetum typhoideus (cv. WCC-75) and Eleusine corocana (cv. CO 1). The aqueous extracts were more inhibitory than the DCM extracts to the germination and seedling growth of the plants studied. The relative rate of inhibition increased in the order of inflorescences. leaves and root bark in the aqueous extracts. whereas DCM root bark and inflorescences extracts were promoted at lower concentrations.

• 대한약학회:학술대회논문집
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• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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• pp.210.4-211
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• 2003

The antioxidant activity of solvent extracts of leaves, trunk and root Pueraria Radix was determined by measuring the radical scavenging effect on l.l-diphenyl-2-picrylny drazyl(DPPH) radical. Extacts prepared from root showed radical scavenging effect on DPPH radical. But, extracts prepared from leaves and trunk did not show activity. The ethyl acetate ewtract of Pueraria Radix root showed radical scavenging activity at an IC 50 value of 75.7 $\mu\textrm{g}$/$m\ell$.

• Journal of Forest and Environmental Science
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• 제26권3호
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• pp.171-179
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• 2010

Effect of chromium (Cr) stress on antioxidant enzyme activities and malondialdehyde (MDA) content were investigated in leaves and roots of mangrove (italic (L.) Druce) seedlings. Cr toxicity effects were also assessed on young seedlings. The seedlings were grown in green house condition for three months in nutrient solution with 0, 0.5, 1, 1.5, 2, 2.5, and 3 mg $L^{-1}$ $CrCl_3$. This study showed that Cr led to the change of antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) and activities at different concentrations. The activity of antioxidant enzymes in leaves of K. candel seedlings indicates that enzymes engaged in antioxidant defense in certain level especially in low concentration of Cr treatments. The activities of SOD and POD were activated by Cr in the root level, while CAT activity was inhibited. CAT activity decreased in response to high concentrations of Cr. In the present study indicated that SOD in root was active in scavenging the superoxide produced by Cr. Both in roots and leaves, an increase in malondialdehyde (MDA) content was observed with increase in metal concentration and exposure periods. Our finding indicated that the high concentration of excessive Cr supply may interfere with several metabolic processes of seedlings, causing toxicity to plants as exhibited by chlorosis, necrosis, photosynthetic impairing and finally, plant death.

• 한국산림과학회지
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• 제87권2호
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• pp.173-178
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• 1998

야생 차나무집단의 임분구조와 현존량의 관계를 파악하기 위하여 지역, 위도 등을 고려하여 12개 야생 차나무 집단을 선정하여 임분구조와 현존량을 조사하였다. 차나무 집단별 평균 근원직경은 집단별 평균 수령과 유의적인 상관관계가 있었으나 집단별 평균 수고, 밀도, 근원단면적은 집단별 평균수령과 유의적인 상관관계가 없었다. 관목층인 차나무 집단의 밀도와 근원단면적은 교목층의 흉고단면적과 유의적인 상관관계가 없었다. 차나무의 표본목 측정 결과 근원직경이 증가함에 따라 줄기와 가지, 뿌리의 건중량은 지수함수적으로 증가하였으며, 1년생 잎과 소지의 건중량은 직선적으로 증가하였다. 2년생 이상 잎 건중량의 경우 근원직경과 상관관계가 없었다. 근원직경이 증가함에 따라 줄기와 가지, 뿌리의 건중량이 증가하는 것은 근주당 줄기의 수가 증가하기 보다는 좋기의 평균 직경과 수고가 증가하기 때문이었다. 차나무 집단의 임목 전체 현존량은 1,162~11,474kg/ha, 주 이용 대상인 1년생 잎의 현존량은 165~1,341kg/ha로서 집단간 큰 차이가 있었으며, T/R율은 1.5~2.8의 범위를 보였다. 축적기관인 줄기와 가지, 뿌리의 현존량은 평균 수령, 평균 근원직경, 밀도와는 독립적이었으나 근원단면적과 유의적인 상관관계가 있었다. 생산기관인 1년생 잎과 소지의 현존량은 평균수령, 평균 근원직경과는 독립적이었으나, 근원단면적, 밀도와 유의적인 상관관계가 있었다.

• Journal of Ginseng Research
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• 제20권1호
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• pp.78-82
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• 1996

In order to clarify effect of transplanting angle of seedling on shape and growth of ginseng root, ginseng of seedlings were transplanted with $60^{\circ}$ and $90^{\circ}$ respectively, and the root characters of 2-, 4- and 6-year-old ginseng were investigated. The length of main root with 45$^{\circ}$was above 7 cm (standard) but that of $60^{\circ}$ and $60^{\circ}$ was below 7 cm (standard). Number of good lateral root was above 2.3 ea for $45^{\circ}$, 0~$30^{\circ}$, but below 2.3 ea per plant for 60~$90^{\circ}$ respectively. Root fresh weight with $0^{\circ}$, $30^{\circ}$, $45^{\circ}$ was heavier than that with $60^{\circ}$ and $90^{\circ}$. Root disease infection rate was highest with $0^{\circ}$. There were, no significant difference in stem length, stem diameter, leaf area, comber of palmate leaves and leaflets per plant, ratio of missing plant, root diameter in 2-, 4- and 6-year-old ginseng.

• Toxicological Research
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• 제7권2호
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• pp.151-155
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• 1991

Thirty six crude drug samples have been prepared from different parts of twenty five plants belonging to different families, and antimutangenic activities were studied by using SOS chromotest (E. coli PQ 37). The following crude extracts of PNG medicinal plants which had a appreciable antimutagenic activity against mitomycin C were: Artocarpus communis (stem bark), Cycas circinalis (leaves), Merremia peltata (leaves), Intsia palembanica (leaves), Annona muricata (stem bark), and Artocarpus altilis (root bark).

• Asian-Australasian Journal of Animal Sciences
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• 제32권3호
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• pp.413-420
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• 2019

Objective: This study investigated the effects of dry radish leaf and root on the quality of pork patties during refrigeration storage. Methods: The patties were divided into the following three groups: the control containing 0% dry radish leaf root powder, RL1 containing 0.5% dry radish leaf root powder, and RL2 and RL3 containing 1% and 2% dry radish leaf root powder, respectively. Proximate composition, pH, cooking loss, microbial analysis, lipid oxidation analysis, color, texture profile analysis and sensory test were performed. Results: Moisture, crude protein, and crude ash contents in RL2 and RL3 were significantly higher than those in other groups (p<0.05), whereas crude fat contents in RL2 and RL3 were significantly lower than other groups (p<0.05). Lightness was significantly lower in RL2 and RL3 than in CON (p<0.05). Cooking loss for RL2 and RL3 were significantly lower than those for the other groups (p<0.05). The pH, thiobarbituric acid levels, and total plate counts of RL2 and RL3 were significantly lower than those of CON at days 7 and 14 (p<0.05). Hardness values of RL2 and RL3 were significantly lower than those of CON, whereas chewiness values were higher than those of CON (p<0.05). In addition, the juiciness of RL2 were significantly greater (p<0.05) than those of the other groups. Conclusion: Dried radish leaves and roots improved the proximate composition and quality characteristics of pork patties, providing a basis to produce high-quality patties with extended expiration dates. Thus, dried radish leaves and roots are effective ingredients for health or functional foods.

• Food Science and Biotechnology
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• 제16권2호
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• pp.238-242
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• 2007

Square root models were developed for predicting the kinetics of growth of Listeria monocytogenes in sesame leaves as a function of temperature (4, 10, or $25^{\circ}C$). At these storage temperatures, the primary growth curves fit well ($R^2=0.898$ to 0.980) to a Gompertz equation to obtain lag time (LT) and specific growth rate (SGR). The square root models for natural logarithm transformations of the LT and SGR as a function of temperature were obtained by SAS's regression analysis. As storage temperature ($4-25^{\circ}C$) decreased, LT increased and SGR decreased, respectively. Square root models were identified as appropriate secondary models for LT and SGR on the basis of most statistical indices such as coefficient determination ($R^2=0.961$ for LT, 0.988 for SGR), mean square error (MSE=0.l97 for LT, 0.005 for SGR), and accuracy factor ($A_f=1.356$ for LT, 1.251 for SGR) although the model for LT was partially not appropriate as a secondary model due to the high value of bias factor ($B_f=1.572$). In general, our secondary model supported predictions of the effects of temperature on both LT and SGR for L. monocytogenes in sesame leaves.

• 한국작물학회지
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• 제44권4호
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• pp.373-381
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• 1999

Six soybean cultivars having different SDS susceptibility were planted with sorghum seedinoculum infested with F. solani isolate 171 in the greenhouse. First leaf symptoms appeared on unifoliar leaves at 9 days after inoculation and all cultivars showed the typical leaf symptoms at 13 days after inoculation, when trifoliar leaves emerged. Leaf symptoms development in susceptible cultivars was faster than in resistant cultivars. Leaf symptom severities during the period of 25 to 29 days after inoculation showed a significant difference between cultivars which had SDS resistance and sus ceptibility. In this period, area under the diseaseprogress curve (AUDPC) of Hartz 6686 was the highest and that of PI 520733 was the lowest. SDS caused serious damage to the growth of soybean in all cultivars. Average reductions of growth rate of root fresh weight and dry weight were greater than those of plant tops. Duyu-kong showed less severe leaf symptoms than that of SDS suscetible cultivars; however, average growth rate of plants top and roots of this cultivar was less but not significantly different than those of SDS susceptible cultivars. In all cultivars, as severity of leaf symptoms increased, plant top weight decreased. Root rot symptoms were observed in all cultivars before leaf symptoms appeared. Average proportions of tap root reddish-brown discoloration of all cultivars was up to 75 % at 15 days after inoculati on; however there was no significant differenc between cultivars at each rating date. Appearances of leaf symptoms on leaves varied in each cultivar. SDS resistant cultivars had a significantly higher level of crinkling than susceptible cultivars and SDS susceptible cultivars had a significantly higher level of necrosis than resistant cultivars. Further study will be needed to identify the relationships between the physiological growth rate and SDS severities in soybeans.