ISSN 2286-6493
Journal of Asian Association of Schools of Pharmacy

Screening of antioxidant activity of vegetables in Thailand  Research Article 

Wanwimon Suksamerkun1, Sukhathai Thongsomchitt1, Yuvadee Wongkrajang1, Rungravi Temsiririrkkul2, Worawan Kitphati1, and Suchitra Thongpraditchote1
1 Department of Physiology, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand.
2 Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand.


    The methanolic extracts of ten Thai vegetables from the leaves of Litsea elliptica Blume, Callerya atropurpurea (Wall.) A. M. Schot, Horaphanam (Limnophila sp.), Sesbania grandiflora (L.) Desv. Young, Kaempferia galanga L., Cucurbita moshata Decne, Allophylus cobbe (L) Raeusch and Manihot esculenta (L) Crantz, rhizomes of Alpinia oxymitrum K. Schum. and roots of Zingiber zerumbet (L.) Smith were investigated for antioxidant activities and total phenolic contents. The antioxidant activities of these extracts were determined by 1,1-diphenyl-2-picryl hydrazyl radical scavenging (DPPH) and ferric-reducing antioxidant power (FRAP) assays. Total phenolic content was evaluated according to the Folin-Ciocalteu procedure. Among the investigated Thai vegetables, the extract from leaves of L. elliptica showed the highest free radical scavenging power with IC50 value of 4.2 µg/ml and the most potent reducing power of 2.02 mmol FeSO4 per g of extract as well as the highest amount of phenolic contents of 11.059 g of gallic acid per 100 g of extract. The results indicated that the antioxidant activity was correlated well with the total phenolic contents suggesting that the phenolic compounds might play a major contribution to free radicals scavenging activity of the studied plants.  


1 antioxidant activity
4 total phenolic content
5 Litsea elliptica
6 Callerya atropurpurea
7 Sesbania grandiflora Kaempferia
8 galangal
9 Cucurbita moschata
10 Manihot esculenta
11 Alpinia oxymitrum
12 Zingiber zerumbet
13 Allophylus cobbe

Published in

JAASP Volume 2
January - December, 2013

Page: 254-261

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