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Antioxdant Activity of Hibiscus cannabinus L. Leaves in Different Growth Time
김성무,엄석현,박형재,유창연,조동하,Jin, Cheng-Wu,Eom, Seok-Hyun,Park, Hyoung-Jae,Ghimeray, Amal Kumar,Yu, Chang-Yeon,Cho, Dong-Ha The Korean Society of Medicinal Crop Science 2009 韓國藥用作物學會誌 Vol.17 No.1
The results on the useful functional compounds of kenaf (Hibiscus cannabinus L.) leaves cultivated in reclaimed lands and the biological activity effects of extracts were as follows. On 98 days after sowing (DAS) Tainung-2 showed the highest total chlorophyll content (1.68 mg/g), and on 141 DAS Dowling showed higher chlorophyll content (1.50 mg/g) than the other two did. In all cultivars the total chlorophyll content was higher on 141 DAS than on 98 DAS. Total polyphenol and total flavonoid contents were the highest in Tainung-2 (30.50 mg/g and 57.03 mg/g, respectively), and total polyphenol and total flavonoid contents (30.50 mg/g and 57.03 mg/g, respectively) were the highest in 30% ethanol extraction. Ascorbic acid contents were higher on 141 DAS than on 98 DAS in three cultivars. SOD activities of kenaf leaf extract were generally over 90%. DPPH radical scavenging activity of Tainung-2 was higher than others.
김성무(Cheng Wu. Jin),박형재(Hyoung Jae Park),엄석현(Seok Hyun Eom),김병완(Byung Wan Kim),성경일(Kyung Il Sung),조동하(Dong Ha Cho) 韓國草地學會 2007 한국초지조사료학회지 Vol.27 No.2
본 연구는 아열대 일년생 작물인 kenaf를 철원지역에서 품종 Dowling, Everglade-41, Tainung-2를 재배하여 생육특성과 광합성율을 측정하였다. 생장분석 결과 파종 후 53일째에 Everglade-41 품종이 잎 생체중과 건물중이 가장 높게 나타내었다. 줄기 무게는 Tainung-2 품종이 가장 높았으며, 93일과 115일째에서는 Dowling 품종이 줄기와 잎에서 가장 높은 생체중과 건물중을 나타내어 생산적 측면에서는 Dowling 품종이 가장 높게 나타났다. 이 생장분석 결과로 Dowling 품종의 높이는 그리 높지 않지만 잎의 수가 많고, 직경이 커서 Dowling 품종이 더 효과적인 생산성을 보였다. 광합성 측정에서는 일사량이 많은 파종 후 73일째인 8월초에 측정한 Everglade-41 품종이 28.6 CO₂ μ㏖ m?²s?¹으로 가장 높은 수치를 나타내었다. 파종 후 115일째 수확시 식물체의 높이는 품종별 차이는 나타내지 않았지만, 줄기의 굵기는 Dowling과 Everglade-41 품종이 28㎜ 정도로 Tainung-2 품종에 비해 현저히 높게 나타났다. 본 시험결과에서는 철원지역에서의 모든 품종들은 앞서 제주지역에서 얻은 실험 결과와 비교하여 수확량은 감소하였다. 이는 제주에서의 kenaf 재배는 철원지역보다 재식밀도가 더 넓었으며 재배기간도 길었기 때문이다. 이러한 결과를 토대로 재식밀도와 재배기간을 더 늘린다면 철원지역에서의 kenaf의 사료작물로서 생산량은 높아지리라 사료된다. This study was carried out to investigate the effects of growing period and cultivars on physiological characteristics and photosynthetic rates of kenaf in Cheorwon, Korea, The possibility of their utilization as forage plant was also discussed. A split plot design composing 3 growing periods (53, 84 and 115 days after sowing) and 3 cultivars (Dowling, Everglade-41 and Tainung-2) was applied for this experiment. Leaf photosynthetic rate was highest 28.6 CO₂ μ㏖ m?²s?¹ in Everglade-41 at the beginning of August when solar irradiation was most intense. In the final biomass of kenaf, Dowing wa the highest among cultivars, with 534.6g/F.W./plant and 109.6g/D.W./plant, respectively. In addition, Dowling was the best in stem thickness among cultivars evaluated. Our results exhibited that all cultivars planted in Cheorwon exhibited decreased yield production compared to a previous report experimented in Jaeju. It may result that cultivation in Jaeju utilized wider planting space and longer cultivating time. In the basis of our data, it is suggest that extending cultivation time and using wider planting space should increase yield in Cheorwon with potential utilization of kanef as a forage crop.