Int. J. Mol. Sci. 2012, 13(8), 10257-10267; doi:10.3390/ijms130810257
Article

Evaluation of Antioxidant Properties and Mineral Composition of Purslane (Portulaca oleracea L.) at Different Growth Stages

1 Institute of Tropical Agriculture, University Putra Malaysia, Serdang 09800, Malaysia 2 Department of Crop Science, Faculty of Agriculture, University Putra Malaysia, Serdang 09800, Malaysia 3 Nanotechnology and Catalysis Research Center, University of Malaya, Kuala Lumpur 50603, Malaysia
* Author to whom correspondence should be addressed.
Received: 13 July 2012; in revised form: 16 August 2012 / Accepted: 16 August 2012 / Published: 16 August 2012
(This article belongs to the Section Bioactives and Nutraceuticals)
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Abstract: The main objective of this research was to appraise the changes in mineral content and antioxidant attributes of Portulaca oleracea over different growth stages. The antioxidant activity was measured using 1,1-diphenyl-2-picrylhydrazyl (DPPH), ferric-reducing antioxidant power (FRAP) assays. The iodine titration method was used to determine the ascorbic acid content (AAC). DPPH scavenging (IC50) capacity ranged from 1.30 ± 0.04 to 1.71 ± 0.04 mg/mL, while the ascorbic acid equivalent antioxidant activity (AEAC) values were 229.5 ± 7.9 to 319.3 ± 8.7 mg AA/100 g, total phenol content (TPC) varied from 174.5 ± 8.5 to 348.5 ± 7.9 mg GAE/100 g. AAC 60.5 ± 2.1 to 86.5 ± 3.9 mg/100 g and FRAP 1.8 ± 0.1 to 4.3 ± 0.1 mg GAE/g. There was good correlation between the results of TPC and AEAC, and between IC50 and FRAP assays (r2 > 0.9). The concentrations of Ca, Mg, K, Fe and Zn increased with plant maturity. Calcium (Ca) was negatively correlated with sodium (Na) and chloride (Cl), but positively correlated with magnesium (Mg), potassium (K), iron (Fe) and zinc (Zn). Portulaca olerecea cultivars could be used as a source of minerals and antioxidants, especially for functional food and nutraceutical applications.
Keywords: antioxidant; ferric-reducing antioxidant power (FRAP); ascorbic acid content (AAC); mineral composition; purslane

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MDPI and ACS Style

Uddin, M.K.; Juraimi, A.S.; Ali, M.E.; Ismail, M.R. Evaluation of Antioxidant Properties and Mineral Composition of Purslane (Portulaca oleracea L.) at Different Growth Stages. Int. J. Mol. Sci. 2012, 13, 10257-10267.

AMA Style

Uddin MK, Juraimi AS, Ali ME, Ismail MR. Evaluation of Antioxidant Properties and Mineral Composition of Purslane (Portulaca oleracea L.) at Different Growth Stages. International Journal of Molecular Sciences. 2012; 13(8):10257-10267.

Chicago/Turabian Style

Uddin, Md. Kamal; Juraimi, Abdul Shukor; Ali, Md. Eaqub; Ismail, Mohd Razi. 2012. "Evaluation of Antioxidant Properties and Mineral Composition of Purslane (Portulaca oleracea L.) at Different Growth Stages." Int. J. Mol. Sci. 13, no. 8: 10257-10267.

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