The current research reports the effects of low-intensity extremely high frequency electromagnetic irradiation (EMI) of 51.8 GHz and 53.0 GHz on green microalga Parachlorella kessleri RA-002 isolated in Armenia. EMI demonstrated different effects on the growth properties of microalgae under various conditions. Under aerobic conditions a positive effect of EMI on the growth rate of P. kessleri and the content of photosynthetic pigments were observed. The data obtained indicates a significant role of O₂, since the enhancing effect of EMI was determined only under aerobic conditions. Meanwhile under anaerobic conditions EMI with both frequencies caused inhibition of algal growth and a decrease in the amount of photosynthetic pigments. EMI also inhibited the yield of H₂ production in P. kessleri, which was partially restored after 5-day cultivation due to the existence of protective mechanisms in this alga. The results might indicate membrane-bound mechanisms of EMI action on algae, which can be associated with the effects on photosynthetic pigments and membrane-associated enzymes responsible for H₂ production. The results are useful for the development of algae biotechnology and the possibility of using EMI as a factor which regulates the production of biomass and biohydrogen by green microalgae.

当前的研究报告了51.8 GHz和53.0 GHz的低强度超高频电磁辐射（EMI）对在亚美尼亚分离的绿色微藻拟小克尔氏菌RA-002的影响。EMI在各种条件下对微藻的生长特性表现出不同的影响。在有氧条件下，观察到EMI对kessleri的生长速率和光合色素含量有积极影响。获得的数据表明O ₂的重要作用，因为仅在有氧条件下才能确定EMI的增强效果。同时，在厌氧条件下，两种频率的EMI都会抑制藻类的生长，并降低光合色素的含量。EMI还抑制了P. kessleri中H ₂产生的产量，由于在该藻中存在保护机制，因此在培养5天后部分恢复了H _2的产量。结果可能表明EMI作用于藻类的膜结合机制，这可能与对光合色素和负责H _2的膜相关酶的影响有关生产。该结果对于藻类生物技术的发展以及使用EMI作为调节绿色微藻生产生物质和生物氢的因子的可能性很有用。