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Transcriptome profiling of the low-salinity stress responses in the gills of the juvenile Pseudopleuronectes yokohamae

文献类型： 外文期刊

作者： Cui, Qianjin 1 ; Qiu, Lihua 2 ; Yang, Xu 1 ; Shang, Shengnan 1 ; Yang, Boxue 1 ; Chen, Mingkang 1 ; Liu, Xia 1 ; Chen, Bi 1 ;

作者机构： 1.Dalian Ocean Univ, Minist Agr, Key Lab Mariculture & Stock Enhancement North Chi, Dalian 116023, Peoples R China

2.Chinese Acad Fisheries Sci, South China Sea Fisheries Res Inst, Guangdong Prov Key Lab Fishery Ecol & Environm, Guangzhou 510300, Guangdong, Peoples R China

关键词： Pseudopleuronectes yokohamae; Salinity stress; Gill; Transcriptome; Differentially expressed genes

期刊名称：COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS （ 影响因子：2.674； 五年影响因子：2.941 ）

ISSN： 1744-117X

年卷期： 2019 年 32 卷

页码：

收录情况： SCI

摘要： Salinity is an important environmental factor that affects the life cycle of fish, including their growth, development and reproduction. The marbled flounder, Pseudopleuronectes yokohamae, is an important economic resource and serves as a good model to investigate osmoregulation, as it can adapt to a wide range of salinity levels. However, the lack of genomic resources for this species has hampered the understanding of the mechanisms underlying its salinity tolerance. In this study, RNA-Seq analysis was conducted to identify genes related to salinity adaptation and osmotic regulation in the gill tissue of marbled flounder exposed to different concentrations of environmental salinity (6 and 30 ppt). After de novo assembly, 19,265 genes were annotated by the Nr database. A comparison of expression between the two salinity groups revealed 673 differentially expressed genes, of which 180 were unregulated and 493 were downregulated in the low salinity group relative to the high salinity group. The related molecular biological processes were explored from several important perspectives, and potential functions were determined by enrichment analyses, including those of metabolites in ion transportation, energy metabolism and protein synthesis, and immune responses. This study is the first transcriptomic study conducted on marbled flounder, and it revealed many novel sequences for further biological analyses. In addition, the candidate genes identified in the gene expression analysis provided insights into responses to salinity change and molecular mechanisms underlying osmoregulation in the gills of marbled flounder.

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