期刊
MARINE ENVIRONMENTAL RESEARCH
卷 169, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2021.105377
关键词
Microplastics; Litopenaeus vannamei; Immunity; Microflora
资金
- National Natural Science Foundation of China [42077364, 31600322]
- Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2018)
- Key Research Projects of Universities in Guangdong Province [2019KZDXM003, 2020KZDZX1040]
- GDAS Project of Science and Technology Development [2019GDASYL0501002]
- National Key Research and Development Program of China [2018YFD0900604]
- China Agriculture Research System [CARS-45-50]
- High-level Leading Talent Introduction Program of GDAS [2016GDASRC0202]
Exposure to different concentrations of microplastics had varying effects on the survival, immune-related gene expression, and microbial response of shrimp. Low concentrations did not cause immune defense responses or death but affected the bacterial composition balance, while high concentrations induced immune responses, microbial changes, and even death. These findings contribute to our understanding of the impacts of microplastics on aquatic organisms.
Microplastics (MPs) are a new type of environmental pollutant. To investigate the response of shrimp and their microflora to MPs, Litopenaeus vannamei (L. vannamei) was exposed to different concentrations of MPs (0, 50, 500, and 5000 mu g/L, i.e., C, L, M and H groups) for 48 h. The survival rate, intake of MPs, immune-related gene expression and microbial response under MP exposure were detected. The results showed that the survival rate in the H group was significantly lower than those in the C, L and M groups, while the relative expression levels of proPO, TLR and ALF in the M and H groups were significantly higher than those in the C and L groups. For the microbial response, microbial community richness in the L group was significantly decreased, while community richness and diversity in the H group were significantly increased compared with those in the C group. The relative abundances of 3, 4 and 11 taxa were significantly changed after MP treatment at the phylum, class and genus levels, respectively. The results suggested that short-term exposure to low concentrations of MPs did not cause immune defense responses or death but affected the balance of bacterial composition in shrimp. Exposure to high concentrations of MPs can induce immune responses and microbial changes and can even cause death in shrimp. These findings increase our understanding of MP impacts on aquatic organisms.
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