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Turkish Journal of Fisheries and Aquatic Sciences 2019, Vol 19, Num, 10     (Pages: 873-883)

Evaluation of Effects of Mg2+ and Cu2+ on Pigment-Metabolite Production and Photosystem II Activity of Arthrospira platensis Gomont 1892

Raziye Ozturk Urek 1 ,Yusuf Kerimoglu 2

1 Dokuz Eylül University, Faculty of Science, Chemistry Department, Biochemistry Division, 35160 Buca-Izmir, Turkey
2 Dokuz Eylül University, Graduate School of Natural and Applied Sciences, Chemistry Department, 35160 Buca-Izmir, Turkey
DOI : 10.4194/1303-2712-v19_10_07 Viewed : 3219 - Downloaded : 3266 The aim of this study was to investigate the effects of Mg2+ (0 - 4 mM), and Cu2+ (0 - 5 µM) concentrations on biomass and photosynthetic pigment-metabolites, and photosystem II activity in Arthrospira platensis Gomont 1892. The highest biomass was determined on control condition including both Mg2+ (0.8 mM) and Cu2+ (0.5 µM) as 49.1±1.6 mg mL-1. lthough the levels of phycocyanin, allophycocyanin and chlorophyll a were varied due to Mg2+ concentration, phycocyanin and allophycocyanin were the major fractions. The highest chlorophyll a level was detected at 0.5 µM Cu2+. The major carotenoid was β-carotene, and its highest value was determined in the absence of Cu2+ as 2400±60 µg mL-1. In addition, excessive and insufficient amounts of Mg2+ and Cu2+ caused a decrease in photosystem II activities of A. platensis. This work provides a good example for the production of carotenoids for use in various industries, such as food, cosmetic and pharmaceutical products. Keywords : Phycocyanin, Chlorophyll a, β-carotene, Cu2+, Mg2+, Photosystem II, Arthrospira platensis