Volume 14 Issue 4
Jul.  2018
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ZHAO Chaoping, GUO Huayang, ZHANG Jian, ZHU Kecheng, GUO Liang, ZHANG Nan, LIU Baosuo, YANG Jingwen, ZHANG Dianchang. Molecular characteristics and expression analysis of AQP1a from Trachinotus ovatus under acute salinity stress[J]. South China Fisheries Science, 2018, 14(4): 56-65. DOI: 10.3969/j.issn.2095-0780.2018.04.007
Citation: ZHAO Chaoping, GUO Huayang, ZHANG Jian, ZHU Kecheng, GUO Liang, ZHANG Nan, LIU Baosuo, YANG Jingwen, ZHANG Dianchang. Molecular characteristics and expression analysis of AQP1a from Trachinotus ovatus under acute salinity stress[J]. South China Fisheries Science, 2018, 14(4): 56-65. DOI: 10.3969/j.issn.2095-0780.2018.04.007
shu

Molecular characteristics and expression analysis of AQP1a from Trachinotus ovatus under acute salinity stress

  • 1.

    Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture; South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China

  • 2.

    College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 200090, China

  • 3.

    Guangdong Provincial Engineer Technology Research Center of Marine Biological Seed Industry, Guangzhou 510300, China

  • 4.

    Guangdong Haid Group Co., Ltd., Guangzhou 511140, China

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  • Received Date: March 04, 2018
  • Revised Date: March 28, 2018
  • Available Online: December 04, 2018
    Graphical Abstract
    • Abstract
  • Aquaporin, a superfamily of internal membrane proteins that mediate transmembrane transport of water molecules, plays an important role in osmotic adjustment. AQP1a gene was obtained in order to study the role of AQP1a in osmoregulation of Trachinotus ovatus under acute salinity stress. The sequence of AQP1a gene was 1 078 bp with an open reading frame of 786 bp encoding 261 amino acids. The structural analysis shows that it has the structural characteristics of MIP family-specific sequence (HINPAVTLG) and two asparagine-proline-alanine (NPA) motifs. The qRT-PCR results show that AQP1a was distributed in the 11 tested tissues, highest in gonads and then in gill, intestine and liver, lowest in muscle. Under acute salinity stress, after being transfered to fresh water, the expression of AQP1a in gill increased at 4th hour, while there was no significant change in the expression in kidney and intestine. After being transfered to 10‰ and 20‰ salinity seawater, the expression of AQP1a in gill increased significantly at 2nd and 4th hour, and then decreased gradually. When being transferred to 10‰ salinity seawater, the expression of AQP1a in intestine increased. In kidney, the expression of AQP1a first increased and then decreased. When being transferred to 20‰ salinity seawater, the expression of AQP1a in intestine only increased significantly at 4th, 8th and 48th hour. In kidney, the expression of AQP1a reached the maximum at 12th hour. In 40‰ salinity seawater, the expression of AQP1a in gill decreased significantly. On the contrary, the expression of AQP1a in kidney and intestine were significantly up-regulated. The results reveal that the specificity of AQP1a functions in different tissues and plays an important role in T.ovatus salinity adaptation.
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    • References (31)
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