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Black carbon and humic acid alleviate the toxicity of antibiotics to a cyanobacterium Synechocystis sp. by Mingtao You; Xiuqi You; Xi Yang; Jingrun Hu; Yitao Lyu; Weiling Sun is a Environmental Science article available to read on EtoBox.

What is Black carbon and humic acid alleviate the toxicity of antibiotics to a cyanobacterium Synechocystis sp. about?

Natural organic matters (NOMs), omnipresent in natural water, challenge the toxicity assessment of pollutants to aquatic organisms due to their complex interactions with chemicals and organisms. Here, we investigated the combined toxicity of one solid NOM (black carbon, BC) or one soluble NOM (humic acid, HA) with antibiotics, roxithromycin (RTM) or gatifloxacin (GAT), to the cyanobacterium Synechocystis sp.. The NOMs alleviated the toxicity of RTM and GAT to Synechocystis sp., and BC had greater alleviation effects than HA due to its stronger adsorption to antibiotics. Antibiotics disturbed the photosynthesis of Synechocystis sp. significantly, which were also mitigated by BC and HA. Proteomic analysis showed that BC up-regulated the pathway of ribosome and photosynthetic antenna protein. GAT down-regulated the pathways of ABC transporter and oxidative phosphorylation. RTM interfered the pathway of porphyrin and chlorophyll metabolism. Furthermore, the addition of BC reduced the number of differentially expressed proteins caused by antibiotics, corroborating its mitigation effects on the toxicity of antibiotics. The disturbance of HA on the pathway of ABC transporters inhibited th

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Author

Mingtao You; Xiuqi You; Xi Yang; Jingrun Hu; Yitao Lyu; Weiling Sun

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)