Published in Scientific Bulletin. Series F. Biotechnologies, Vol. XXIII
Written by Cristina MOISESCU, Ana-Valentina ARDELEAN, Daniel NEGUT, Ioan I. ARDELEAN
Microalgae are microorganisms very important for fluxes of matter, energy and information on planet Earth as well as for a plethora of biotechnological applications. In this paper, we present our original results concerning the use of acute gamma irradiation (0.9 Gy/s) to challenge the cells of Chlorella sorokiniana UTEX 2130 and Synechocystis PCC 6803.The main results obtained on Chlorella sorokiniana UTEX 2130 are: a) a great decrease in the generation time to 56% after 10 Gy irradiation, to 60% after 50 Gy irradiation, and to77% after 100 Gy irradiation, whereas b)the relative lipid content increased by 20% and 50% after 10 Gy and 100 Gy (as compared with the non-irradiated control). The main results obtained on Synechocystis PCC 6803 are: a) the generation time decreased to 90% after 10 Gy irradiation, to 85% after 50 Gy irradiation, whereas b) there is an increase in the chlorophyll a content (by 33%) and carotene (by 22%) after an irradiation of 50 Gy.
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