Assessment of the Physiological Activities of Flower Extracts from White Lotus
2008
Im, M.H. (Mokpo National University, Muan, Republic of Korea) | Park, Y.S. (Mokpo National University, Muan, Republic of Korea) | Cho, J.Y. (Jeonnam Provincial College, Damyang, Republic of Korea) | Heo, B.G. (Naju Foundation of Natural Dyeing Cultural, Naju, Republic of Korea), E-mail: [email protected]
This study was conducted to gather basic data on the physiological activities of flower extracts from 4 cultivars of white lotus to promote the increase of public consumption. Four cultivars of white lotus: c.v. 'Garam', 'Choeue', 'Baekhwageonryeon', and 'Seungdal' were harvested on 14, August, 2007, and the physiological activities of flower extracts obtained by hot water extraction and ethanol extraction were examined. Total phenol content was highest in the 'Garam' flower hot water extracts, 144.2㎍ㆍmL-¹, and lowest in the 'Seungdal' flower ethanol extracts, 63.4㎍ㆍmL-¹. DPPH radical scavenging activity was highest at 2,000ppm flower extract of 'Garam' obtained by hot water extraction and ethanol extraction of 90.9% and 83.0%, respectively. Total flavonoid content in the flower extracts of 'Garam' obtained by hot water extraction and ethanol extraction showed the highest levels at 34.1㎍ㆍmL-¹ and 33.9㎍ㆍmL-¹, respectively. Nitrite scavenging activity at 1,000ppm flower extract was highest in 'Garam'. Extracts obtain by hot water and ethanol showed 91.3% and 80.4% activity, respectively. No significant difference in tyrosinase inhibition activity was observed among the cultivars or as a result of extraction method. Overall anti-microbial activity of the flower extracts was slightly higher in 'Garam' than in the other cultivars.
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