Solomonova Ekaterina S, Shoman Natalia Yu, Akimov Arkady I
Department of Algae Ecological Physiology, A.O. Kovalevsky Institute of Biology of the Southern Seas of the Russian Academy of Sciences, 2, Nahimov Ave, Sevastopol, Russian Federation.
Folia Microbiol (Praha). 2025 Mar 15. doi: 10.1007/s12223-025-01255-7.
The effect of the antibiotic tetracycline on the growth and photosynthetic activity of the diatoms Cyclotella caspia Grunow, 1878, and Thalassiosira weissflogii (Grunow) G.A. Fryxell & Hasle, 1977, has been studied. The rate of tetracycline concentration decreases in the medium with and without has been estimated. The expediency and prospects of using diatoms as promising objects for water purification from tetracycline are shown. It was found that the rate and efficiency of tetracycline removal from the medium in the presence of algae depends on the initial content of the pollutant in the medium. The maximum efficiency of antibiotic removal is observed at concentrations of the pollutant provoking the hormesis growth of algae at 5 mg/L in C. caspia and 10 mg/L in T. weissflogii. In samples with C. caspia and tetracycline, the residual antibiotic content in the medium was 10-14% lower than in samples without algae. In the experiment with T. weissflogii, this indicator reached 15-16%. At concentrations of the pollutant, 2 and 10 mg/L in C. caspia and 2 and 5 mg/L in T. weissflogii, the effectiveness of removing the antibiotic by algae was lower. The residual content of tetracycline in the medium was on average 8-11% lower than in samples without algae. At antibiotic concentrations of 15 and 20 mg/L, the rate of its removal in samples with and without algae did not significantly differ. This result is obviously due to the toxic effect of tetracycline on cells, leading to pronounced inhibition of algae growth and/or death.
研究了抗生素四环素对硅藻里海小环藻（Cyclotella caspia Grunow，1878）和威氏海链藻（Thalassiosira weissflogii (Grunow) G.A. Fryxell & Hasle，1977）生长及光合活性的影响。估算了有藻和无藻情况下培养基中四环素浓度的降低速率。展示了将硅藻作为从水中去除四环素的有前景对象的合理性和前景。发现有藻类存在时从培养基中去除四环素的速率和效率取决于培养基中污染物的初始含量。在里海小环藻中污染物浓度为5 mg/L、威氏海链藻中为10 mg/L时，观察到抗生素去除的最大效率，此时污染物浓度引发藻类的兴奋效应生长。在含有里海小环藻和四环素的样品中，培养基中抗生素残留量比无藻样品低10 - 14%。在威氏海链藻的实验中，该指标达到15 - 16%。在里海小环藻中污染物浓度为2和10 mg/L、威氏海链藻中为2和5 mg/L时，藻类去除抗生素的效果较低。培养基中四环素的残留量平均比无藻样品低8 - 11%。在抗生素浓度为15和20 mg/L时，有藻和无藻样品中其去除速率无显著差异。该结果显然是由于四环素对细胞的毒性作用，导致藻类生长明显受抑制和/或死亡。
