Kalkan Samet
Recep Tayyip Erdogan University, Faculty of Fisheries, Ataturk Street Fener District, 53100 Merkez, Rize, Turkey.
Mar Pollut Bull. 2022 Jun;179:113652. doi: 10.1016/j.marpolbul.2022.113652. Epub 2022 Apr 29.
The Black Sea is unfortunately globally established as a highly polluted sea, with contaminants from various sources polluting its marine sediments. This study aimed at analyzing heavy metal resistance levels by heterotrophic bacteria colonizing marine sediments across Black Sea shores within Turkey. Twenty-nine bacterial samples from marine sediments were investigated through exposure to sixteen heavy metal salts using the microdilution method. The minimum inhibitory concentration values for bacterial colonies within such marine sediment samples ranged from <0.97 mM/L to >1000 mM/L. Trough and peak minimum inhibitory concentration values were determined at <0.17 mg/mL and > 331 mg/mL. Peak tolerated and peak toxic heavy metals were identified as iron and cadmium, respectively. Resistance ratios were also obtained in this study. Bacillus wiedmannii was identified as the most resistant bacterial population when exposed to heavy metal salts. This study shows occurrence of heavy metal resistant bacteria within Black Sea sediments.
不幸的是，黑海在全球范围内被公认为是污染严重的海域，来自各种来源的污染物污染了其海洋沉积物。本研究旨在分析土耳其黑海沿岸海洋沉积物中异养细菌的重金属抗性水平。通过微量稀释法，将来自海洋沉积物的29个细菌样本暴露于16种重金属盐中进行研究。这些海洋沉积物样本中细菌菌落的最低抑菌浓度值范围从<0.97 mM/L到>1000 mM/L。最低抑菌浓度的谷值和峰值分别在<0.17 mg/mL和>331 mg/mL时测定。耐受峰值和毒性峰值重金属分别被鉴定为铁和镉。本研究还获得了抗性比率。当暴露于重金属盐时，维德曼芽孢杆菌被鉴定为最具抗性的细菌种群。这项研究表明黑海沉积物中存在重金属抗性细菌。
