Study on Bioactive Potential of Sulfated Polysaccharide from Green Alga Ulva lactuca L. in Tuticorin from Southeast Coast of India

To study the bioactive potential of sulfated polysaccharide from green alga Ulva lactuca in Tuticorin coast. The isolated green alga was identified based on the morphological characters for the extraction of sulphated polysaccharide. The bioactive potential sulfated polysaccharide was determined using ABTS, free radical scavenging, antioxidant and its antibacterial activity was also evaluated. Sulfated polysaccharide (5.5 ± 0.6%) was extracted from green alga Ulva lactuca through the ethanol precipitation and purified through DEAE cellulose column and sephadex G -50. The superoxide anion and nitric oxide radical scavenging activity of sulfated polysaccharide was 71.74 ± 0.20% and 61.23 ± 0.48%, respectively. These results suggested that the in vitro antioxidant activity of sulfated polysaccharide obtained from Ulva lactuca can be employed for food industry. In addition to that, it possesses antibacterial activity against aquatic pathogens. This may also justify the frequent use of natural antioxidants in a variety of food products.