title: Antioxidant activity of some Moroccan marine microalgae: Pufa profiles, carotenoids and phenolic content.
abstract: In order to promote Moroccan natural resources, this study aims to evaluate the potential of microalgae isolated from Moroccan coastlines, as new source of natural antioxidants. Different extracts (ethanolic, ethanol/water and aqueous) obtained from 9 microalgae strains were screened for their in vitro antioxidant activity using DPPH free radical-scavenging assay. The highest antioxidant potentials were obtained in Dunalliela sp., Tetraselmis sp. and Nannochloropsis gaditana extracts. The obtained results indicate that ethanol extract of all microalgae strains exhibit higher antioxidant activity, when compared to water and ethanol/water extracts. Therefore, total phenolic and carotenoid content measurement were performed in active ethanol extracts. The PUFA profiles of ethanol extracts were also determined by GC/MS analysis. The studied microalgae strains displayed high PUFA content ranging from 12.9 to 76.9 %, total carotenoids content varied from 1.9 and 10.8mg/g of extract and total polyphenol content varied from 8.1 to 32.0mg Gallic acid Equivalent/g of extract weight. The correlation between the antioxidant capacities and the phenolic content and the carotenoids content were found to be insignificant, indicating that these compounds might not be major contributor to the antioxidant activity of these microalgae. The microalgae extracts exerting the high antioxidant activity are potential new source of natural antioxidants.
authors.affiliation: Green Biotechnology Center, MAScIR (Moroccan Foundation for Advanced Science, Innovation & Research) Rabat Design Center, Rabat, Morocco; Laboratory of Biochemistry-Immunology, Sciences Faculty-University Mohammed V of Rabat, Morocco.
authors.forename: Amal
authors.initials: A
authors.lastname: Maadane
authors.affiliation: Green Biotechnology Center, MAScIR (Moroccan Foundation for Advanced Science, Innovation & Research) Rabat Design Center, Rabat, Morocco. Electronic address: n.merghoub@mascir.com.
authors.forename: Nawal
authors.initials: N
authors.lastname: Merghoub
authors.affiliation: Green Biotechnology Center, MAScIR (Moroccan Foundation for Advanced Science, Innovation & Research) Rabat Design Center, Rabat, Morocco.
authors.forename: Tarik
authors.initials: T
authors.lastname: Ainane
authors.affiliation: Green Biotechnology Center, MAScIR (Moroccan Foundation for Advanced Science, Innovation & Research) Rabat Design Center, Rabat, Morocco.
authors.forename: Hicham
authors.initials: H
authors.lastname: El Arroussi
authors.affiliation: Green Biotechnology Center, MAScIR (Moroccan Foundation for Advanced Science, Innovation & Research) Rabat Design Center, Rabat, Morocco.
authors.forename: Redouane
authors.initials: R
authors.lastname: Benhima
authors.affiliation: Laboratory of Biochemistry-Immunology, Sciences Faculty-University Mohammed V of Rabat, Morocco.
authors.forename: Saaid
authors.initials: S
authors.lastname: Amzazi
authors.affiliation: Laboratory of Biochemistry-Immunology, Sciences Faculty-University Mohammed V of Rabat, Morocco.
authors.forename: Youssef
authors.initials: Y
authors.lastname: Bakri
authors.affiliation: Green Biotechnology Center, MAScIR (Moroccan Foundation for Advanced Science, Innovation & Research) Rabat Design Center, Rabat, Morocco.
authors.forename: Imane
authors.initials: I
authors.lastname: Wahby
mesh_terms: D000975:Antioxidants / Q000737:chemistry* / Q000302:isolation & purification; D001713:Biphenyl Compounds / Q000737:chemistry / Q000302:isolation & purification; D002338:Carotenoids / Q000737:chemistry* / Q000302:isolation & purification; D000431:Ethanol / Q000737:chemistry / Q000302:isolation & purification; D005707:Gallic Acid; D058086:Microalgae / Q000737:chemistry* / Q000254:growth & development; D009018:Morocco; D010636:Phenols / Q000737:chemistry* / Q000302:isolation & purification; D010851:Picrates / Q000737:chemistry / Q000302:isolation & purification; D059808:Polyphenols / Q000737:chemistry
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D010636:Phenols; D010851:Picrates; D059808:Polyphenols; D002338:Carotenoids; D000431:Ethanol; D005707:Gallic Acid; C004931:1,1-diphenyl-2-picrylhydrazyl
keywords: Antioxidant activity; Carotenoids content; Microalgae; PUFA profiles; Phenolic content