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The bioremediation potentials and mercury(II)-resistant mechanisms of a novel fungus Penicillium spp. DC-F11 isolated from contaminated soil
- Source :
- Journal of hazardous materials. 396
- Publication Year :
- 2020
-
Abstract
- Bioremediation of Hg-contaminated soil using microbe-based strategies is a promising and efficient method as it is inexpensive and not harmful to the environment. In this study, a novel Hg(II)-volatilizing fungus Penicillium spp., DC-F11 was isolated and showed bioremediation potential for reducing Hg(II) phytotoxicity, total Hg, and exchangeable Hg in Hg(II)-polluted soil. Subsequently, the mechanisms of Hg(II) volatilization and resistance involved were investigated using multiple complementary techniques. The fungal cells could detoxify Hg(II) by extracellular sequestration via adsorption and precipitation. Moreover, a comparative transcriptome analysis uncovered the primary intracellular adaptive responses of the DC-F11 to Hg(II) stress, including mer-mediated detoxification system, thiol compound metabolism, and oxidative stress defense and damage repair metabolism. These results showed that the resistance of DC-F11 to Hg(II) was generally a multisystem collaborative process. Here, we report, for the first time, that the mer-mediated detoxification system was responsible for Hg(II) volatilization in fungus. These findings provide a better understanding of the mechanisms involved in Hg(II) volatilization and resistance that occur in fungi and also provide a strong theoretical basis for the future application of fungi in the bioremediation of Hg-polluted environments.
- Subjects :
- Environmental Engineering
Health, Toxicology and Mutagenesis
0211 other engineering and technologies
chemistry.chemical_element
02 engineering and technology
Fungus
010501 environmental sciences
01 natural sciences
Soil
Bioremediation
Environmental Chemistry
Soil Pollutants
Waste Management and Disposal
0105 earth and related environmental sciences
021110 strategic, defence & security studies
Volatilisation
biology
Fungi
Penicillium
Metabolism
Mercury
biology.organism_classification
Pollution
Soil contamination
Mercury (element)
Biodegradation, Environmental
chemistry
Environmental chemistry
Phytotoxicity
Subjects
Details
- ISSN :
- 18733336
- Volume :
- 396
- Database :
- OpenAIRE
- Journal :
- Journal of hazardous materials
- Accession number :
- edsair.doi.dedup.....69d09b44668c6dc71cc81f16a47cd68f