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P. Jenifer ¹, A. Selvin Samuel ²

Affiliations
1 Department of Botany, Aditanar College of Arts and Science, Virapandianpatnam, Tiruchendur-628 216, Tamil Nadu, IN
2 Department of Botany, St. John’s College, Palayamkottai, Tirunelveli, Tamil Nadu, IN

Abstract

The present study was made on physicochemical characteristics of agricultural soil samples at various stations of Tuticorin district were analyzed. Physicochemical parameters like pH, Electrical conductivity (EC), Organic carbon (OC), Organic matter (OM), available Nitrogen (N2), Phosphorus (P), Sodium (Na), Calcium (Ca), Magnesium (Mg) and Calcium carbonate (CaCO3) were analyzed under laboratory conditions. Among these, pH (6.55 to 7.25), EC (0.83 to 0.266 microhoms), OC (0.546 to 1.74 %), OM (0.956 to 3.08%), N2 (0.243 to 0.516 %), P (0.093 to 0.259%), Na (24.66 to 135.33 ppm), Ca (0.057 to 2.127 mg/g), Mg (0.015 to 0.068 mg/g) and CaCO3 (1.81 to 7.633%) ranges were recorded at all the stations.

Keywords

Soil, pH, EC, Minerals, Macro Nutrients.

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P. Jenifer ¹, C. P. Balakrishnan ¹, S. Chidambaram Pillai ²

Affiliations
1 Department of Botany, Aditanar College of Arts and Science, Virapandianpatnam, Tiruchendur - 628216, Tamil Nadu, IN
2 Research Department of Botany, V.O. Chidambaram College, Tuticorin- 628 008, Tamil Nadu, IN

Abstract

Seaweeds are potential as natural sources of antioxidants and have gained recent attention. The present study was made on antioxidant activity was performed by organic solvent extracts like methanol and aqueous of marine red algae Gracilaria foliifera (Forssk). In-vitro antioxidant analysis like DPPH, H₂O₂, OH, NO radical scavenging activity and total antioxidant activity also carried out by using standard procedures. In this study, radical scavenging activity was observed in different concentrations range from 100, 250, 500,750, 1000 μg/ml. The performances of scavenging activity of above extracts were comparing with standard ascorbic acid. An IC₅₀ value of methanol and aqueous extract of DPPH radical were recorded at 679.27μg/ml and 801.12μg/ml, H₂O₂ radical were recorded at 790 μg/ml and 935.95μg/ml, hydroxyl radical at 687.92μg/ml and 159.56μg/ml respectively. Whereas nitric oxide the IC₅₀ of methanol and aqueous were recorded at 812.75μg/ml and 1107.17μg/ml respectively. They were compared with IC₅₀ value of standard ascorbic acid. In-vitro antioxidant results clearly indicated that the beneficial effect of G. foliifera exhibited significant value was compared with standard.

Keywords

Antioxidant, DPPH, Hydroxyl, Nitric Oxide, Hydrogen Peroxide.

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