Chemistry and bioactivity studies of green alga Ulva lactuca L. and red alga Amphiroa anceps (Lamarck) Decaisne

Abstract

Methanol extracts of common seaweeds Ulva lactuca and Amphiroa anceps were subjected to antibacterial, antifungal, antioxidant, cytotoxicity and seed germination inhibition assays. Me0H extract of Amphiroa anceps showed seed germination inhibition activity and cytotoxicity. However, no activity was observed in Ulva lactuca extract. Column chromatography of the methanol extract of Amphiroa anceps followed by PTLC gave sitosterol and stearic acid. Column chromatography of the Me0H extract of Ulva lactuca followed by PTLC gave several metabolites, and three of them were identified as (Z)-stigmasta-5, 24(28)-dien-3-ol, Oleic acid and a triglyceride with two linoleic acid units and one stearic acid unit.