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Physiological activity of methanol extract and fractions from Citrus grandis Osbeck pericarp
J Plant Biotechnol 2018;45:279-286
Published online September 30, 2018
© 2018 The Korean Society for Plant Biotechnology.

Hyun Min Ko, Ju-Sung Kim

Major in Plant Resource and Environment, SARI, Jeju National University, Jeju, 63243, Korea
Correspondence to: e-mail: aha2011@jejunu.ac.kr
Received August 28, 2018; Revised September 12, 2018; Accepted September 12, 2018.
cc This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Citrus grandis Osbeck pericarp is used as tea, herbal medicine, etc., but is not commercialized in various ways. So, in this study, we identified potential for use of Citrus grandis Osbeck as health functional foods, cosmetics and food preservatives. Methanol extract of Citrus grandis Osbeck pericarp was fractionated with hexane, dichloromethane, ethyl acetate and butanol, to quantitatively analyze total phenol and flavonoid, and investigate antioxidative and enzyme inhibitory activities. Total phenol and flavonoid contents were highest in ethyl acetate fraction, FRAP and ORAC results also revealed highest activity in proportion to total phenol content. DPPH radical scavenging activity revealed that ethyl acetate, butanol and dichloromethane fraction manifested highest activity without significant difference. However, dichloromethane fraction revealed higher TEAC value and tyrosinase inhibitory activity than ethyl acetate fraction, and hexane fraction manifested best results with superoxide radical scavenging activity and ɑ-glucosidase inhibitory activity. Antimicrobial activity also revealed best effect in dichloromethane and hexane fractions. So, based on the following results, use of dichloromethane fraction as material of natural functional cosmetics, ethyl acetate fraction for health functional foods, and hexane fractions for pharmaceuticals and food preservatives, would be most practical for product development.
Keywords : Flavonoid, ɑ-Glucosidase, Microorganism, Oxygen free radical, Phenol, Tyrosinase


September 2018, 45 (3)
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