MOLECULAR MECHANISM OF Cr(Ⅵ) REDUCTION INHIBITION BY <i>PANNONIBACTER PHRAGMITETUS</i> BB WITH CO-EXISTING Zn(Ⅱ)

TANG Jia-qi; YANG Wei-chun; YANG Zhi-hui; LIAO Qi

doi:10.13205/j.hjgc.202104007

Volume 39 Issue 4

Jul. 2021

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TANG Jia-qi, YANG Wei-chun, YANG Zhi-hui, LIAO Qi. MOLECULAR MECHANISM OF Cr(Ⅵ) REDUCTION INHIBITION BY PANNONIBACTER PHRAGMITETUS BB WITH CO-EXISTING Zn(Ⅱ)[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(4): 36-41. doi: 10.13205/j.hjgc.202104007

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MOLECULAR MECHANISM OF Cr(Ⅵ) REDUCTION INHIBITION BY PANNONIBACTER PHRAGMITETUS BB WITH CO-EXISTING Zn(Ⅱ)

doi: 10.13205/j.hjgc.202104007

School of Metallurgy and Environment, Central South University, Changsha 410083, China

Received Date: 2020-07-13
Available Online: 2021-07-21

Abstract

Abstract

The mechanisms of microbial growth delay and Cr(Ⅵ) reduction inhibition by co-existing Zn(Ⅱ) were revealed through the electron transport system activity, enzyme activity, and real-time quantitative PCR technology. The Cr(Ⅵ) reduction by strain BB was intracellularly and extracellularly inhibited by co-existing Zn(Ⅱ). The decrease of microbial electron transport system activity and cytochrome c oxidase activity caused by co-existing Zn(Ⅱ) were responsible for the extracellular inhibition. While intracellular Cr(Ⅵ) reduction was inhibited by reducing the efficiency of chromium transport. The activities of SOD, CAT, POD, and GST indicated that the co-existing Zn(Ⅱ) was lower toxic to strain BB, which could explained the growth delay of strain BB caused by co-existing Zn(Ⅱ).
- molecular mechanism,
- inhibition,
- co-existing Zn(Ⅱ),
- Cr(Ⅵ) reduction,
- Pannonibacter phragmitetus BB

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References(27)

References

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