Response of microbiota and immune function to different hypotonic stress levels in giant freshwater prawn Macrobrachium rosenbergii post-larvae
文献类型： 外文期刊
作者： Liu, Bo 1 ; Gao, Qiang 4 ; Sun, Cunxin 2 ; Song, Changyou 2 ; Liu, Mingyang 1 ; Zhou, Qunlan 2 ; Zheng, Xiaochuan 2 ; Liu, Xin 1 ;
作者机构： 1.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Peoples R China
2.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Aquat Anim Nutr & Hlth, Wuxi 214081, Peoples R China
3.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Freshwater Fisheries & Germplasm Resources, Minist Agr & Rural Affairs, Wuxi 214081, Peoples R China
4.Zhejiang Inst Freshwater Fishery, Huzhou 313001, Peoples R China
5.Nanjing Agr Univ, Wuxi Fisheries Coll, 9 Shanshui East Rd, Wuxi 214081, Peoples R China
关键词： Macrobrachium rosenbergii; Hypotonic stress; Microbial composition; Gene expression; Antioxidant capacity
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：10.753； 五年影响因子：10.237 ）
ISSN： 0048-9697
年卷期： 2022 年 844 卷
页码：
收录情况： SCI
摘要： This study explored the effects of different hypotonic stress levels on antioxidant capacity, microbial composition, and gene expression of Macrobrachium rosenbergii post-larvae. The salinity of the control group was 15 %o (S15), and the hypotonic stress groups included three levels of 10 %o (S10), 8 %o (S8), and 6 %o (S6). Different hypotonic stress levels caused oxidative damage in post-larvae, evidenced by decreased superoxide dismutase (SOD) and anti-superoxide anion free radical (ASAFR). They increased malondialdehyde (MDA), nitric oxide (NO), and inducible nitric oxide synthase (iNOS) levels. Microbiological analysis exhibited that different hypotonic stress levels significantly changed microbial composition and diversity. The microbial composition in the water environment where post-larvae living was different from post-larv ae. The pathogenic bacteria, including Vibrio and Flavobacterium, were abundant in S6. Transcriptome analysis showed 2, 7967, 297 DEGs, including 1, 3564, 27 up-regulated genes and 1, 4403, 270 down-regulated genes in S10, S8, and S6 groups, respectively. K EGG enrichment results showed that immune and glucose metabolism-related pathways were enriched significantly. Correlation network analysis demonstrated close interactions among antioxidant parameters, microbes, and differentially-expressed genes. In conclusion, hypotonic stress reduced the antioxidant capacity, caused oxidative damage, and altered microbial composition in M. rosenbergii post - larvae. Moreover, when the salinity is below 8 %o, hypotonic stress impairs the immune system of M. rosenbergii post-larvae.
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