不同温度条件下黑足鲍干露耐受能力和生化响应的模拟研究
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S917

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农业农村部农业国际合作交流项目(“一带一路”热带国家水产养殖科技创新合作);中国水产科学研究院基本科研业务费项目(2018GH08).


Dry exposure stress tolerance and physiological response of black abalone Haliotis iris at different temperatures
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    摘要:

    为了解黑足鲍(Haliotis iris)在不同温度条件下对干露的耐受能力及生化响应情况,于2019年11月在新西兰进行了黑足鲍的室内可控实验。结果显示,黑足鲍的耐干露能力随着温度的升高而降低,4℃、10℃和15℃条件下干露胁迫的半致死时间(LT50)分别为:48.80 h、33.75 h和23.20 h;各实验组的细胞色素氧化酶(CCO)活力呈现持续降低的趋势,从0 h的11.45~12.70 U/mg降低到1.43~1.83 U/mg,温度越高的实验组CCO活力降低的速率越快,且各实验组CCO活力的最小值显著低于对照组(P<0.05);延胡索酸还原酶(FRD)、乳酸脱氢酶(LDH)活力和一氧化氮(NO)含量呈先升高再降低趋势,温度越高的实验组,指标到达最大值的时间越短;过氧化氢酶(CAT)和超氧化物歧化酶(SOD)只在4℃实验组表现出协同作用,其余两个实验组SOD酶未被激活;丙二醛(MDA)含量持续升高,从0 h的2.71~3.01 μmol/mg增长到8.62~9.10 μmol/mg,温度越高的实验组,MDA含量到达最大值的时间越短,且含量显著高于对照组(P<0.05)。研究表明,黑足鲍可以通过保持一定时间的有氧呼吸和糖酵解的异化作用来应对干露胁迫,但是随着干露时间的延长,代谢系统紊乱,乳酸大量积累。同时,干露胁迫也导致了免疫相关功能的紊乱,各种因素共同作用从而影响其生存。

    Abstract:

    New Zealand black abalone Haliotis iris is an important aquatic species with high nutritional value and a bright shell. Since initial research was found to possibly effectively enrich aquaculture species in China, there has been much scientific interest in this species. Limited studies have been conducted on the tolerance and physiological response of H. iris to desiccation during long-distance transportation, and these studies are important for subsequent experiments and breeding. To investigate H. iris tolerance to desiccation at different temperatures, physiological experiments were carried out in New Zealand in November 2019. Variations in H. iris respiratory metabolism and immunity were monitored. The results showed that the desiccation tolerance of H. iris decreased with higher temperatures. The half-lethal time (LT50) under 4, 10, and 15℃ were 48.80, 33.75, and 23.20 h, respectively. During the experiments, cytochrome oxidase (CCO) activity decreased from 11.45-12.70 U/mg at 0 h to 1.43-1.83 U/mg, the CCO activity of the experimental group with high temperatures decreased rapidly, and the minimum value of CCO activity in each experimental group was significantly lower than that in the control group (P<0.05). However, fumarate reductase (FRD), lactate dehydrogenase (LDH), and nitric oxide (NO) activity increased in the beginning and then decreased. Catalase (CAT) and superoxide dismutase (SOD) only showed synergy in the 4℃ experimental group, and SOD of the other two experimental groups were not activated. Malondialdehyde (MDA) content increased from 2.71-3.01 μmol/mg at 0 h to 8.62-9.10 μmol/mg, the MDA content of the experimental group with high temperatures reached the maximum value early, and the content was significantly higher than that of the control group (P<0.05). The results implied that H. iris could tolerate desiccation by maintaining aerobic respiration and glycolysis to some extent. Thereafter, the metabolic system was disordered, and a large amount of lactic acid was accumulated. Desiccation also lead to the disturbances of immune-related functions, which affected H. iris survival under other combined stresses. This study explored the physiological response of H. iris under conditions of desiccation, and the results provided a basis for further research. Methods to maintain the physiological state of H. iris during long-distance transportation should be investigated in the future.

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刘毅,张继红,吴文广,孙科,杨珺,朱芸,张紫轩,夏玉莹.不同温度条件下黑足鲍干露耐受能力和生化响应的模拟研究[J].中国水产科学,2020,27(11):1316-1324
LIU Yi, ZHANG Jihong, WU Wenguang, SUN Ke, YANG Jun, ZHU Yun, ZHANG Zixuan, XIA Yuying. Dry exposure stress tolerance and physiological response of black abalone Haliotis iris at different temperatures[J]. Journal of Fishery Sciences of China,2020,27(11):1316-1324

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  • 收稿日期:2020-06-04
  • 最后修改日期:2020-07-06
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  • 在线发布日期: 2020-11-19
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