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- W4386757629 endingPage "166880" @default.
- W4386757629 startingPage "166880" @default.
- W4386757629 abstract "Microplastics could act as vectors for the transport of harmful bacteria, such as pathogens and antibiotic resistance bacteria (ARB), but their combined effects have not been reported yet. Here, ARB Shigella flexneri with sulfonamides resistance and micro-polystyrene (micro-PS) were used to investigate their possible combined effects on the growth and expression of functional genes in Daphnia magna. Results showed that micro-PS colonized with S. flexneri were ingested by D. magna and blocked in their intestine after 24 h exposure. Changes were observed in the life history and morphology of D. magna, as well as the expression of functional genes in all treatments, but with no difference in the survival rate. We also determined the expression of six functional genes involved in energy and metabolism (arginine kinase, AK) and oxidative stress response (thioredoxin reductase, TRxR, catalase, CAT, and glutathione S-transferases, GSTs), as well as in growth, development and reproduction (vitellogenin, Vtg1 and ecdysone receptor, EcR). AK and Vtg1 did not show significant differences, however, EcR was down-regulated and the other three genes (TRxR, CAT, GSTs) were up-regulated in the combined-treated group. Antibiotic resistance gene (ARGs) sul1 was detected when exposed to micro-PS colonized with S. flexneri., suggesting that D. magna could acquire resistance genes through microplastic biofilms. These results indicated that MPs could act as a carrier of ARB to transfer ARGs into D. magna, and affect the life history, morphology, and the expression of related functional genes of D. magna, to adapt to the stress caused by MPs and ARB." @default.
- W4386757629 created "2023-09-16" @default.
- W4386757629 creator A5006168706 @default.
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- W4386757629 creator A5039525839 @default.
- W4386757629 creator A5049224932 @default.
- W4386757629 creator A5055866930 @default.
- W4386757629 creator A5057782410 @default.
- W4386757629 creator A5061671532 @default.
- W4386757629 creator A5077020482 @default.
- W4386757629 date "2023-12-01" @default.
- W4386757629 modified "2023-09-26" @default.
- W4386757629 title "Combined effects of microplastics and antibiotic-resistant bacteria on Daphnia magna growth and expression of functional genes" @default.
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