Antioxidant and Antimicrobial Activities of Ethanol Extract from the Stem and Leaf of Impatiens balsamina L. (Balsaminaceae) at Different Harvest Times

Molecules

Suk-Nam Kang¹  Young-Min Goo³  Mi-Ra Yang¹  Rashid Ismael Hag Ibrahim²  Jae-Hyeon Cho⁴  Il-Suk Kim¹ 

[1] Department of Horticulture, Gyeongnam National University of Science and Technology, Gyeongnam 660-758, Korea; E-Mail:;Sanchung Oriental Medicinal Herb Institute, Chancheong 666-831, Korea; E-Mail:;Institute of Life Science, College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Korea; E-Mail:

关键词: Impatiens balsamina;    phenolic;    flavonoid;    antioxidant activity;    antimicrobial activity;   

DOI  :  10.3390/molecules18066356

来源: mdpi

【 摘 要 】

The aim of this study was to investigate the total phenolic content, total flavonoid contents, antioxidant activity and antimicrobial activity of ethanolic extract from stems (S) and leaves (L) of Impatiens balsamina L. (Balsaminaceae), which were harvested in Korea on March 10, 2011 (S1 and L1), May 14, 2011 (S2 and L2), and July 5, 2011 (S3 and L3), respectively. Our results revealed that the total phenolic (79.55–103.94 mg CE/g extract) and flavonoid (57.43–104.28 mg QE/g extract) contents of leaf extract were higher (p < 0.01) than those of stem extract. Leaf extracts (L1, L2, and L3) exhibited stronger (p < 0.01) free radical scavenging activity (66.06, 63.71, and 72.19%, respectively) than that of the positive control. In terms of antimicrobial activity, leaf extracts showed higher inhibitory effects against microorganisms than those of stem extracts (S1, S2, and S3). Among the leaf extracts at different harvest times, L3 showed the greatest antimicrobial activity against both Gram negative and Gram positive strains. From these results, the leaf extract from I. balsamina L. might be a valuable bioactive resource, and would seem to be applicable as a natural antioxidant in food preservation.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.