Effect of heavy metals on the production of siderophores by an endolithic strain of Bacillus velezensis S18

Abstract

The high anthropogenic load of heavy metals on water resources has a negative impact on all living organisms, causing environmental, medical and economic problems. One of the most ubiquitous microorganisms in aquatic ecosystems is the genus Bacillus. The study of the mechanisms by which Bacillus bacteria adapt to heavy metal exposure contributes significantly to the understanding of physiological and biotechnological processes. This study focuses on the effect of heavy metals on the production of siderophores by the endolithic strain Bacillus velezensis S18. The B. velezensis S18 strain was found to demonstrate resistance towards high concentrations of heavy metals, as well as the ability to secrete siderophores. Thus, B. velezensis S18 has significant potential for the detoxification and recovery of metals from contaminated surface and groundwater.