Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Phytochemical Constituents, Antimicrobial Properties and Bioactivity of Marine Red Seaweed (Kappaphycus alvarezii) and Seagrass (Cymodocea serrulata)

Version 1 : Received: 30 June 2023 / Approved: 3 July 2023 / Online: 4 July 2023 (02:12:49 CEST)

A peer-reviewed article of this Preprint also exists.

Das, D.; Arulkumar, A.; Paramasivam, S.; Lopez-Santamarina, A.; del Carmen Mondragon, A.; Miranda Lopez, J.M. Phytochemical Constituents, Antimicrobial Properties and Bioactivity of Marine Red Seaweed (Kappaphycus alvarezii) and Seagrass (Cymodocea serrulata). Foods 2023, 12, 2811. Das, D.; Arulkumar, A.; Paramasivam, S.; Lopez-Santamarina, A.; del Carmen Mondragon, A.; Miranda Lopez, J.M. Phytochemical Constituents, Antimicrobial Properties and Bioactivity of Marine Red Seaweed (Kappaphycus alvarezii) and Seagrass (Cymodocea serrulata). Foods 2023, 12, 2811.

Abstract

The present work was performed to evaluate the levels of phytochemical constituents and the antioxidant and antibacterial properties of marine red seaweed (Kappaphycus alvarezii) and seagrass (Cymodocea serrulata). Quantitative phytochemical analysis, antioxidant activity and antimicrobial activity against 5 potential pathogenic bacteria was investigated. In both cases were found presence of flavonoids, tannins, phenolic compounds, glycosides, steroids, carbohydrates and ashes. Alkaloids were only found in K. alvarezii, buy not in C. serrulata. The antimicrobial properties of both K. alvarezii and C. serrulata chloroform extracts were found to be antagonis-tically effective against the gram-positive bacterium Bacillus subtilis and the gram-negative bacterium Vibrio parahaemolyticus, Vibrio alginolyticus, Vibrio harveyi and Klebsiella pneu-moniae. GC‒MS analysis revealed the presence of 94 bioactive compounds in K. alvarezii and 104 C. serrulata, including phenol, decane, dodecane, hexadecane, vanillin, heptadecane, diphenyla-mine, benzophenone, octadecanoic acid, dotriaconate, benzene, phytol, butanoic acid, and 2-hydroxyl-ethyl ether, which played a vital role in antioxidant and antibacterial activities. Thus, in view of the results, both K. alvarezii and C. serrulata could be considered as sources of ingre-dients with appreciable nutritional and medicinal value.

Keywords

phytochemicals; seaweed; seagrass; Kappaphycus; Cymodocea; antimicroboal; phenolic; GC‒MS; radical scavenging

Subject

Biology and Life Sciences, Food Science and Technology

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