Pulsed Microwave-Induced Growth Enhancement of <i>Euglena gracilis</i> Microalgae – Approach for Improved Industrial Cultivation

This study investigates the effects of microwave radiation on Euglena gracilis (Euglena) during brief exposure periods, as well as the subsequent enhancement of growth under different conditions. The growth patterns of Euglena in these environments were systematically analyzed. Additionally, the study examined whether the growth rate of microwave-irradiated heterotrophic cultures of Euglena could be improved with 24-hour or shorter light exposure, which is an important factor in the industrial production of this organism. Results indicated that a 1-minute pulse of microwave radiation caused a twofold increase in growth compared to the control, even under autotrophic culture conditions without added CO₂. Furthermore, there was a significant 2.6-fold increase in growth when daily light exposure was reduced from 24 to 10 hours.