急性低盐度对缢蛏存活率、Na+/K+-ATPase活性以及血淋巴细胞吞噬能力的影响
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S917

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水产双一流学科建设项目(A1-3201-19-300201)


Effects of acute low salinity on Sinonovacula constricta survival rate, Na+/K+-ATPase activity and phagocytosis of hemocytes
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    摘要:

    以缢蛏(Sinonovacula constricta)为研究对象,对其进行急性低盐胁迫,并检测低盐对缢蛏存活率、Na+/K+-ATPase活性及其血淋巴细胞吞噬能力的影响。结果表明:3种不同大小规格的缢蛏,在盐度从8降低到2时,存活率接近100%,Na+/K+-ATPase活性保持稳定,吞噬能力小范围下降;但是当盐度从2降低到0时,其存活率随着盐度的下降而降低,且成体的存活率始终比亚成体和稚贝的存活率要高,同时调节Na+/K+-ATPase活力相应升高来维持体内外渗透压的调节;盐度急性下降,缢蛏的生理功能受影响,吞噬能力也随之降低。稚贝、亚成体和成体缢蛏的LC50低盐度分别为1.45、1.25和0.75。缢蛏对急性低盐度有很强的耐受能力,可能是一种极具内陆移殖潜力的海水贝类。

    Abstract:

    Sinonovacula constricta was used as the research species. Acute low salinity stress method was used, and the survival rate, Na+/K+-ATPase (NKA) activity and phagocytosis of hemocytes of S. constricta were measured. The results showed when the salinity was set from 8 to 2, the survival rate of three different sizes S. constricta were almost 100%, the NKA activity kept relatively stable, and the phagocytic capacity of hemocytes only had a small range of decline. When salinity was set from 2 to 0, the survival rate of three different sizes S. constricta decreased with the decrease of salinity, and the survival rate of adult was higher than that of the sub-adult and juvenile all the time. The NKA activity was correspondingly increased to maintain the osmolality balance inside and outside of the body. It is believed that the physiological function of S. constricta was affected by salinity acute decrease, so the phagocytic capacity of hemocytes was reduced. The low salinity LC50 of juveniles, sub-adults and adult were 1.45, 1.25 and 0.75, respectively. In summary, S. constricta has a strong tolerance to acute low salinity and could be a potential inland aquaculture species.

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李智,彭茂潇,叶博,牛东红,蓝天一,刘晓军,李家乐.急性低盐度对缢蛏存活率、Na+/K+-ATPase活性以及血淋巴细胞吞噬能力的影响[J].上海海洋大学学报,2020,29(4):489-495.
LI Zhi, PENG Maoxiao, YE Bo, NIU Donghong, LAN Tianyi, LIU Xiaojun, LI Jiale. Effects of acute low salinity on Sinonovacula constricta survival rate, Na+/K+-ATPase activity and phagocytosis of hemocytes[J]. Journal of Shanghai Ocean University,2020,29(4):489-495.

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  • 收稿日期:2019-08-23
  • 最后修改日期:2020-02-15
  • 录用日期:2020-02-24
  • 在线发布日期: 2020-07-23
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