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Mangalore, India

Athiperumalsami T.,Botany Research Laboratory | Rajeswari V.D.,Botany Research Laboratory | Poorna S.H.,SRM University | Kumar V.,Botany Research Laboratory | Jesudass L.L.,P.A. College
Botanica Marina | Year: 2010

Five species of seagrasses and six species of seaweeds in 11 genera were collected from the Gulf of Mannar, on the southeastern coast of India and were screened for antioxidant activity by in vitro methods. Methanolic and water extracts of the seagrass Halophila ovalis had the highest antioxidant activity, with IC50 values 78.95±1.15 and 85.40±3.40 μg ml-1 (means±SE), respectively, using the NO radical scavenging method. With the H2O2 scavenging method, both methanolic and water extracts of many of the seagrasses and seaweeds had higher antioxidant activity, with the IC50 values lower than that of the standard tocopherol. Except for vitamin B3, the rest of the antioxidant-potent phytoconstituents estimated in these marine organisms were found to be strongly positively correlated with the antioxidant activity. © 2010 by Walter de Gruyter Berlin New York. Source

Jeevitha M.,Botany Research Laboratory | Athiperumalsami T.,Botany Research Laboratory | Kumar V.,Botany Research Laboratory
Phytochemistry | Year: 2013

The amount of dietary fibre,mineral and vitamin were determined in root,rhizome and leaf of four com- monly-available seag rasses, Cymodocea serrulata, Syringodium isoetifolium,Halophila ovalis and Halodule pinifolia at a station off Hare Island,Tuticorin (8 - 450 N, 78 - 120 E) in the Gulf of Mannar Biosphere region during premonsoon (July-September),monsoon (October-December)and postmonsoon (January- March) seasons of 2010-2011and 2011-2012study period.The entire tissues from each seagrass were subjected to HPLC and GC analysis for determining amino acid and fatty acid profilesrespectively .The rhizomes of H. ovalis possessed highest amount of dietary fibreduring monsoon. C. serrulata showed max-imum content of K in rhizome during monsoon.Highest amount of Ca and Mg was recorded in the rhi- zome and leaf of H. pinifolia in postmonsoon. S. isoetifolium exhib ited peak value for Na in its rhizome during monsoon. Highest amounts of Vitamin A,Cand Ewere registered in the rhizome/root of Cymod-ocea during postmonsoon. Vitamin B3 was maximum in the root of Syringodium in monsoon. Eighteen of the twenty amino acids detected in seagrasses were found to the maximum level in Halodule. Syriingodi-um showed the highest amount of six of the seven fatty acids recorded. © 2013 Elsevier Ltd. All rights reserved. Source

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