title: Biochemical composition and antioxidant activities of Arthrospira (Spirulina) platensis in response to gamma irradiation.
abstract: Arthrospira (Spirulina) platensis is a blue-green alga, rich with bioactive components and nutrients. To evaluate effect of gamma irradiation, A. platensis was exposed to different doses of 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5kGy. The data showed that the phenolic and proline contents significantly increased with the increase of gamma irradiation doses up to 2.0kGy, above which a reduction was observed. The soluble proteins and malondialdehyde (MDA) contents were stimulated by all tested irradiation doses. Furthermore, the vitamins (A, K and B group) and mineral contents (N, P, Na, K, Ca, Mg and Fe) were stimulated by the irradiation doses compared with the control. The activities of some N-assimilating and antioxidant enzymes were significantly increased with the irradiation doses up to 2.0kGy. This study suggests the possible use of gamma irradiation as a stimulatory agent to raise the nutritive value and antioxidant activity of A. platensis.
authors: Botany Department, Faculty of Science, Cairo University, Cairo, Egypt.
authors: Effat Fahmy
authors: EF
authors: Shabana
authors: Botany Department, Faculty of Science, Cairo University, Cairo, Egypt.
authors: Mahmoud Ali
authors: MA
authors: Gabr
authors: Radioisotope Department, Nuclear Research Centre, Atomic Energy Authority, Cairo, Egypt.
authors: Helal Ragab
authors: HR
authors: Moussa
authors: Radioisotope Department, Nuclear Research Centre, Atomic Energy Authority, Cairo, Egypt.
authors: Enas Ali
authors: EA
authors: El-Shaer
authors: Botany Department, Faculty of Science, Zagazig University, Zagazig, Egypt. Electronic address: mostafamsami@yahoo.com.
authors: Mostafa M S
authors: MMS
authors: Ismaiel
mesh_terms: D000975:Antioxidants / Q000032:analysis*; D008903:Minerals / Q000032:analysis; D010084:Oxidation-Reduction; D011506:Proteins / Q000032:analysis; D053545:Spirulina / Q000737:chemistry* / Q000528:radiation effects*; D014815:Vitamins / Q000032:analysis
chemical_list: D000975:Antioxidants; D008903:Minerals; D011506:Proteins; D014815:Vitamins
keywords: Antioxidant enzymes; Arthrospira; Gamma irradiation; Minerals; Nitrogen assimilating enzymes; Phenols; Proline; Protein; Vitamins