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EFFECT OF ULTRAVIOLET-B IRRADIATION ON FATTY ACIDS, AMINO ACIDS, PROTEIN CONTENTS, ENZYME ACTIVITIES AND ULTRASTRUCTURE OF SOME ALGAE
Authors: Nadia H. Noaman , Faiza M.A. Akl, Magda A. Shafik , Mohamed S.M. Abdel-Kareem , Wafaa M. Menesi
Number of views: 489
A series of experiments were conducted to determine fatty acids, amino acids,
protein contents and enzymes activities of three algae (Ulva lactuca, Sargassum
hornschuchii and Pterocladia capillacea) subjected to UV-B radiation. These parameters
were estimated, when the UV-absorbing compounds contents recorded its maximum after
the third day of irradiation of 60 minutes daily. Total saturated, mono unsaturated and
polyunsaturated fatty acids of U. lactuca and S. hornschuchii were increased due to UV-B
irradiation, while that of Pterocladia capillacea decreased. The study shows that amino
acids of the three studied algal species varied greately due to UV-B rirradiation. The total
protein content showed also different responses after UV-B irradiation. Exposure to UVB
radiation increased the activity of superoxide dismutase, ascorbate peroxidase and
catalase of the three irradiated algal species. The findings also suggests that exposure to
UV-B irradiance also affect the ultrastructure of all the irradiated algal specis