Comparative Evaluation of Phytochemical, Biochemical and Antioxidant Profiles in Padina tetrastromatica Hauck and Gracilaria corticata. J. Ag.

Roshni P. Rajan, Dr. Sruthy E. P. M., Dr. Chitra G.

Abstract: Current study evaluates the hydrographic features of seawater and compares the pigment composition, biochemical profile, phytochemical constituents and antioxidant activity of Padina tetrastromatica Hauck and Gracilaria corticata J. Ag. Seawater parameters remained within typical marine ranges, with pH 8.15 ? 0.05, dissolved oxygen 3.87 ? 0.098 mg/L and moderate nutrient levels. Pigment analyses showed higher chlorophyll fractions in P. tetrastromatica while G. corticata displayed markedly elevated carotenoid content. Biochemical assessment revealed greater protein and carbohydrate levels in G. corticata. Phytochemical screening indicated abundant flavonoids, phenols, tannins and terpenoids in extracts of both species with solvent dependent variation. Total phenolic and flavonoid content were highest in acetone extracts of P. tetrastromatica and distilled water extracts of G. corticata. DPPH assays demonstrated dose dependent antioxidant activity with acetone extracts exhibiting the strongest radical scavenging effect. Overall, both seaweeds show significant biochemical richness and antioxidant potential supporting their relevance for nutraceutical applications.

Keywords: Hydrographic features, Pigment composition, Biochemical profile, Phytochemical constituents and Antioxidant activity

How to Cite?: Roshni P. Rajan, Dr. Sruthy E. P. M., Dr. Chitra G., "Comparative Evaluation of Phytochemical, Biochemical and Antioxidant Profiles in Padina tetrastromatica Hauck and Gracilaria corticata. J. Ag.", Volume 14 Issue 12, December 2025, International Journal of Science and Research (IJSR), Pages: 566-570, https://www.ijsr.net/getabstract.php?paperid=SR251204142535, DOI: https://dx.doi.org/10.21275/SR251204142535