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Phthalate Esters Metabolic Strain Gordonia sp. GZ-YC7, a Potential Soil Degrader for High Concentration Di-(2-ethylhexyl) Phthalate
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Researchers isolated a novel bacterium, Gordonia sp. GZ-YC7, from agricultural soil contaminated by plastic film mulch that could degrade di-(2-ethylhexyl) phthalate at concentrations up to 1000 mg/L and tolerate levels as high as 4000 mg/L, with comparative genomics revealing the degradation pathway.
As commonly used chemical plasticizers in plastic products, phthalate esters have become a serious ubiquitous environmental pollutant, such as in soil of plastic film mulch culture. Microbial degradation or transformation was regarded as a suitable strategy to solve the phthalate esters pollution. Thus, a new phthalate esters degrading strain Gordonia sp. GZ-YC7 was isolated in this study, which exhibited the highest di-(2-ethylhexyl) phthalate degradation efficiency under 1000 mg/L and the strongest tolerance to 4000 mg/L. The comparative genomic analysis results showed that there exist diverse esterases for various phthalate esters such as di-(2-ethylhexyl) phthalate and dibutyl phthalate in Gordonia sp. GZ-YC7. This genome characteristic possibly contributes to its broad substrate spectrum, high degrading efficiency, and high tolerance to phthalate esters. Gordonia sp. GZ-YC7 has potential for the bioremediation of phthalate esters in polluted soil environments.
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Phthalate Esters Metabolic Strain Gordonia sp. GZ-YC7, A Potential Soil Degrader for High Concentration Di-(2-ethylhexyl) Phthalate
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Researchers isolated a new bacterial strain, Gordonia sp. GZ-YC7, from soil used with plastic mulch film, which can efficiently break down high concentrations of phthalate esters — common plasticizers that leach from plastic products into soil and water. Microbial degradation of phthalates is important because these compounds are linked to hormone disruption in humans and wildlife.
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