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Allelopathic Effects of Artemisia lavandulaefolia
Kil, B.S.,Han, D.M.,Lee, C.H.,Kim, Y.S.,Yun, K.Y.,Yoo, H.G. The Ecological Society of Korea 2000 Journal of Ecology and Environment Vol.23 No.2
The allelopathic effects of Artemisia lavandulaefolia were studied using several test plants and microbes. Aqueous extracts and volatile compounds of A. lavandulaefolia inhibited seed germination, seedling and root growth of the test species such as Achyranthes japonica. Lactuca sativa, Artemisia princeps var. orientalis. Oenothera odorata, Plantago asiatica. Aster yomena, Elsholtzia ciliata, and Raphanus sativus var. hortensis for. acanthiformis. The root growth of test species was more affected than shoot growth by allelochemicals of A. lavandulaefolia. Essential oil of A. lavandulaefolia had antibacterial and antifungal effects. However, the antimicrobial activity of the essential oil was dependent upon the microbial species and concentrations. Callus growth of Oryza sativa, Brassica campestris subsp. napus var. pekinensis and Achyranthes japonica was sensitive by the essential oil of A. lavandulaefolia. Twenty three chemicals were identified from A. lavandulaefolia essential oil by gas chromatography. Primary allelochemicals among them were 1, 8-cineole, 1-$\alpha$-terpineol, $\alpha$-terpinene. camphor, 2-buten-1-ol and azulene. We concluded that aqueous extract and essential oil of A. lavandulaefolia were responsible for allelopathic effects.
Cho, S.B.,Cho, S.H.,Chang, S.S.,Chung, I.B.,Lim, J.S.,Kil, D.Y.,Kim, Yoo Yong Asian Australasian Association of Animal Productio 2006 Animal Bioscience Vol.19 No.11
To investigate the effects of feeding restricted on growth, carcass characteristics and plasma profiles in an attempt for optimum responses, a total of 108 cross-bred finishing barrows [(Landrace${\times}$Yorkshire)${\times}$Duroc]weighing an average of $46.88{\pm}0.52kg$ were assigned in a randomized complete block (RCB) design to one of four treatments with three replicates and nine pigs per pen. Feeding regimens were, 1) ad libitum from 50 kg to market weight (Ad 3/3), 2) restricted feeding from 90 kg to market weight (Ad 2/3), 3) restricted feeding from 70 kg to market weight (Ad 1/3), and 4) restricted feeding from 50 kg to market weight (Ad 0/3). During the experimental period, average daily feed intake (ADFI) was decreased from 2.53 kg (AD 3/3) to 2.09 kg (AD 0/3) with increasing restricted feeding duration of (p<0.05). Average daily gain (ADG) of AD 3/3 (0.79 kg) was significantly higher (p<0.05) than those of AD 1/3 (0.74 kg) or AD 0/3 (0.72 kg). Feed efficiency was not influenced by restriction regimens. Blood IGF-I concentrations were increased from 74.14 to 134.25 (167.36-115.66) ng/ml as body weight increased. Blood leptin concentrations were affected by feed intake level and coincided with blood IGF-I concentrations. Most of carcass characteristics were not significantly affected by restricted feeding, however cooking losses in AD 1/3 and Ad 0/3 treatment diet were higher than those in Ad 3/3 and Ad 2/3. In addition, there was a trend that backfat thickness was lowered in proportional to decreasing feed intake (p>0.05). In conclusion, restricted feeding improved feed efficiency after 50 kg body weight without deteriorating the pork quality of barrows.
고추 (Capsicum annuum L.) 생육에 미치는 금진광천수의 영향
유지혜 ( J. H. Yoo ),성은수 ( E. S. Seong ),김남준 ( N. J. Kim ),황인성 ( I. S. Hwang ),이재근 ( J. G. Lee ),권순성 ( S. S. Kwon ),김정득 ( J. D. Kim ),최선강 ( S. K. Choi ),심재만 ( J. M. Sim ),길현영 ( H. Y. Kil ),유창연 ( C. Y. Yu 강원대학교 농업생명과학연구원(구 농업과학연구소) 2011 강원 농업생명환경연구 Vol.23 No.3
Geumjin Thermal Water (GTW) from the Geumjin area (Gangneung-city, Korea) has abundance minerals such as selenium, vanadium, calcium and magnesium etc.. In this study, we treated various concentrations of GTW in hot pepper (Capsium annuum L.). GTW treatments of 1-10% showed different phenotypes in plant length, fresh weight, length and width of leaf, color of leaf and number of leaf. The height of plants treated by GTW was taller than control. However, it of them was reduced over 5% GTW treatment. The fresh weight of plant indicated highly as 30.0±0.1g in 5% treatment condition. There was no difference between control and treated plants with GTW in the width of leaf. But, the length of leaves showed highest in 5% (9.2±0.6cm) treatment condition. From these results, we consider that GTW showed the effect on initial biomass of plants.
Kil Sun Yoo,Haejeen Bang,Leonard Pike,Bhimanagouda S. Patil,Eun Jin Lee 한국원예학회 2020 Horticulture, Environment, and Biotechnology Vol.61 No.2
Plant pigments such as anthocyanins and carotenoids have been shown to be benefi cial to human health. Therefore, carrotlines of diff erent colors have been recently developed. This study aimed to characterize terpenoid, carotene, anthocyanin,and soluble solids content and antioxidant activity levels in orange, yellow, black, and purple carrots to develop new colorcarrot cultivars with more nutrients, health benefi ts, and consumer acceptance. Both individual and total terpenoid contentgreatly varied among breeding lines. Each line had a unique composition, and there was no general pattern between color andterpenoid content. Orange carrot roots had high levels of α-carotene, β-carotene, and total carotenoids compared with yellow. Red carrots were characterized by high lycopene content, and black carrots exhibited identical levels of lycopene content toyellow carrots. Leaf tissues contained lutein as the main carotenoid followed by β-carotene. There was no clear relationshipbetween leaf and root carotene profi les and content. Black and purple root colors were determined by composition and amountof anthocyanin compounds, and about fi ve major compounds were detected in this study. Total anthocyanin content was highin solid black carrots and decreased as the interior root color contained more yellow, with low and trace levels in purple andorange carrots, respectively. Soluble solid content ranged between 4.0 and 9.5 °Brix among lines. Anthocyanin content washighly correlated with antioxidant activity. Each color of carrot contained diff erent levels of the tested compounds and mayrequire extensive breeding to obtain desired levels.
Kil-Sun Yoo,방혜진,이은진,Kevin Crosby,Bhimanagouda S. Patil 한국원예학회 2012 Horticulture, Environment, and Biotechnology Vol.53 No.6
The effects of flesh color, season, and test cross on carotenoid, sugar, and ascorbic acid contents of 20watermelon genotypes with red, pink, orange, and yellow flesh were examined. Red- and pink-fleshed watermelons contained lycopene (4.8-47.8 μg・g-1 fresh weight), β-carotene (< 3.7 μg・g-1), and lutein (< 0.9 μg・g-1) as the major carotenoids. The orange and yellow watermelons contained complex mixtures of prolycopene, lycopene, and β-carotene with levels less than 7.4, 1.5, and 8.5 μg・g-1, respectively. There were also minor carotenoids, such as violaxanthin,lutein, neurosporene, and zeacarotene in the range of 0-1.4 μg・g-1. Total sugar contents ranged from 24 to 91 mg・g-1,with sucrose, glucose, and fructose as the major sugars. The sugar profiles were divided into sucrose-, fructose-, and non-dominant groups. Higher percentages of glucose and fructose were negatively correlated with the total sugar content. Fairly-low levels of ascorbic acid, less than 28.2 μg・g-1, were measured, and some genotypes had nearly no ascorbic acid. There were only slight differences in ascorbic acid, sugar, soluble-solid, and total-carotenoid contents among 11 genotypes harvested in June and November. Five sets of test crosses showed various trends of heritability of carotenoids, sugars, and ascorbic acid in F1 hybrids. In general, carotenoids and total sugar content tended to be inherited from the parent with lower carotenoid and sugar contents, respectively. Paralleled chemical analyses will be beneficial for efficient progress in breeding efforts and genetic research.
이은진,Kil-Sun Yoo,Bhimanagouda S. Patil 한국원예학회 2011 Horticulture, Environment, and Biotechnology Vol.52 No.4
Minimally processed carrot products in finger or coin shapes are increasingly popular due to their convenience. The ‘BetaSweet’ carrot is a purple carrot with a high carotenoid and anthocyanin content, sweet taste, and juicy, crisp texture. This study was performed to investigate the changes in carotenoid, anthocyanin, and sugar of the sliced purple and an orange carrot during 4 weeks of cold storage at 2℃ or 4℃, simulating the transportation and marketing period. The purple carrot contained about 200-230 μg・g-1 fresh weight total carotenoid and there was a slight decrease in the total carotenoid content during the 4-week period at both temperatures. Anthocyanin and total sugar contents were about 400-500 μg・g-1 and 70 mg・g-1 fresh weight, respectively and did not change significantly at either temperature. The orange carrots, tested for comparison,contained about 100 μg・g-1 total carotenoid and about 60 mg・g-1 fresh weight total sugar, and showed similar trend as the purple carrots during cold storage. Transfer from 2℃ to 4℃ at 2 weeks did not show significant changes in any of the parameters. Sliced carrots had about 10% to 15% less carotenoid content as compared to whole carrots, probably due to wound damage and the oxidation process. The content of nutritional compounds of the purple carrots harvested during April and June was similar to that obtained throughout the season, demonstrating that consistent quality products could be produced. Our study confirmed that the changes in quality of sliced purple carrots were minimal or negligible during the commercial marketing period of 2 weeks, if the product was handled and displayed at 4℃ or below.