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Glycine-β-cyclodextrin—assisted cometabolism of phenanthrene and pyrene by Pseudomonas stutzeri DJP1 from marine sediment

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  • Ecology
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Abstract

Cometabolic degradation is currently an effective and extensively way to remove high molecular weight polycyclic aromatic hydrocarbons (HMW-PAHs). Unfortunately, due to low bio-accessibility and high biotoxicity, the cometabolic degradation rate of HMW-PAHs is limited. Glycine-β-cyclodextrin (GCD) was obtained through amino modification of β-cyclodextrin (BCD) and added to cometabolic system of phenanthrene (PHE) and pyrene (PYR) to assist PYR biodegradation. Results show that the addition of GCD (100 mg/L) effectively improved the removal rate of PYR (20 mg/L) by 42.3%. GCD appeared to increase the bio-accessibility and reduce the biotoxicity of PHE and PYR, and then promoted the growth of Pseudomonas stutzeri DJP1 and stimulated the elevation of dehydrogenase (DHA) and catechol 12 dioxygenase (C12O) activities. The phthalate metabolic pathway was accelerated, which improved the cometabolic degradation. This study provided a new reference for the cometabolic degradation of HMW-PAHs.

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Data Availability Statement

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Authors

Contributions

Junfeng JIANG: original manuscript drafting, methodology. Weijun TIAN: conceptualization, funding acquisition, review, and editing. Zhiyang LU: investigation, validation. Meile CHU: investigation, validation. Huimin CAO: investigation, validation. Dantong ZHANG: investigation, validation.

Corresponding author

Correspondence to Weijun Tian.

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Supported by the National Natural Science Foundation of China (No. 51979255)

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Jiang, J., Tian, W., Lu, Z. et al. Glycine-β-cyclodextrin—assisted cometabolism of phenanthrene and pyrene by Pseudomonas stutzeri DJP1 from marine sediment. J. Ocean. Limnol. 42, 560–569 (2024). https://doi.org/10.1007/s00343-023-3002-z

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  • DOI: https://doi.org/10.1007/s00343-023-3002-z

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