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Molecules 2013, 18(6), 6356-6365; doi:10.3390/molecules18066356
Article

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

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Received: 6 May 2013; in revised form: 16 May 2013 / Accepted: 27 May 2013 / Published: 29 May 2013
(This article belongs to the Section Metabolites)
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Abstract: 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.
Keywords: Impatiens balsamina; phenolic; flavonoid; antioxidant activity; antimicrobial activity Impatiens balsamina; phenolic; flavonoid; antioxidant activity; antimicrobial activity
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Kang, S.-N.; Goo, Y.-M.; Yang, M.-R.; Ibrahim, R.I.H.; Cho, J.-H.; Kim, I.-S.; Lee, O.-H. Antioxidant and Antimicrobial Activities of Ethanol Extract from the Stem and Leaf of Impatiens balsamina L. (Balsaminaceae) at Different Harvest Times. Molecules 2013, 18, 6356-6365.

AMA Style

Kang S-N, Goo Y-M, Yang M-R, Ibrahim RIH, Cho J-H, Kim I-S, Lee O-H. Antioxidant and Antimicrobial Activities of Ethanol Extract from the Stem and Leaf of Impatiens balsamina L. (Balsaminaceae) at Different Harvest Times. Molecules. 2013; 18(6):6356-6365.

Chicago/Turabian Style

Kang, Suk-Nam; Goo, Young-Min; Yang, Mi-Ra; Ibrahim, Rashid I.H.; Cho, Jae-Hyeon; Kim, Il-Suk; Lee, Ok-Hwan. 2013. "Antioxidant and Antimicrobial Activities of Ethanol Extract from the Stem and Leaf of Impatiens balsamina L. (Balsaminaceae) at Different Harvest Times." Molecules 18, no. 6: 6356-6365.



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