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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Long-term exposure to salinity variations induces protein carbonylation in the copepod Acartia tonsa
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Long-term exposure to salinity variations induces protein carbonylation in the copepod Acartia tonsa

机译：长期暴露于盐度变化会导致the足类A螨的蛋白质羰基化

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摘要

Salinity is a key variable influencing the life history of aquatic organisms. Environmental variability in salinity has been associated with increases in the formation of reactive species, ending up in a state of oxidative stress. In copepods, information about effects of salinity variations mostly includes data from short-term experiments where the effects of salinity changes are evaluated in terms of survival and vital rates, and data involving oxidative stress biomarkers are limited. Here, we experimentally evaluate the effects of long-term salinity variations in the estuarine copepod Acartia tonsa through the analysis of protein carbonylation, vital rates (egg production, EPR; ingestion, IR) and gross growth efficiency (GGE). Cultured copepods were subjected to alternate salinity increases and decreases between S = 10 and 20, in steps of 5 units every 12 h, during 15 days (Sv treatment). A control group (no salinity change) was subjected to the same manipulation but in a constant salinity condition (S = 15). Protein carbonylation was higher in females under the Sv treatment compared to control, whereas in males this was not observed. However, males presented significantly higher levels of protein carbonylation than females, irrespective of experimental condition. EPR was higher in control while IR was higher in Sv treatment, but differences were not significant. Instead, GGE showed clear cut and significant differences between Sv and control. While decreased GGE was indicative of significantly increased metabolic expenditures under variable salinity condition, higher oxidative damage was likely a side effect of increased metabolic demands and production of reactive oxygen species.
机译：盐度是影响水生生物生命史的关键变量。盐度的环境可变性与反应性物质形成的增加有关，最终以氧化应激状态出现。在co足类中，有关盐度变化影响的信息主要包括来自短期实验的数据，其中盐度变化的影响根据生存率和生命率进行评估，而涉及氧化应激生物标记物的数据有限。在这里，我们通过蛋白质羰基化，生命率（蛋产量，EPR，摄入，IR）和总生长效率（GGE）的分析，通过实验评估河口co足纲A菜中长期盐度变化的影响。培养的co足类动物在15天（Sv处理）中，每12小时5个单位，在S = 10和20之间交替进行盐度增加和减少。对照组（无盐度变化）进行相同的操作，但盐度恒定（S = 15）。与对照相比，在Sv处理下，女性的蛋白质羰基化更高，而在男性中则未观察到。然而，无论实验条件如何，雄性都表现出比雌性明显更高的蛋白质羰基化水平。对照中EPR较高，而Sv治疗中IR较高，但差异不显着。取而代之的是，GGE显示了清晰的片段，并且Sv与对照之间存在明显差异。虽然降低的GGE表示在盐度变化的条件下新陈代谢支出显着增加，但较高的氧化损伤可能是新陈代谢需求增加和活性氧产生的副作用。

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  • 来源
    《Journal of Experimental Marine Biology and Ecology》 |2020年第5期|151337.1-151337.7|共7页
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    Univ La Republ Ctr Univ Reg Este Ecol Func Sistemas Acuat Rocha 27000 Uruguay|Helmholtz Ctr Polar & Marine Res Alfred Wegener Inst Dept Funct Ecol D-27570 Bremerhaven Germany;

    Univ La Republ Ctr Univ Reg Este Ecol Func Sistemas Acuat Rocha 27000 Uruguay;

    Univ La Republ Fac Ciencias Lab Fisicoquim Biol Montevideo 11400 Uruguay;

    Univ La Republ Ctr Univ Reg Este Ecol Func Sistemas Acuat Rocha 27000 Uruguay|Univ La Republ Fac Ciencias Secc Oceanog & Ecol Marina Montevideo 11400 Uruguay;

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  • 正文语种 eng
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  • 关键词

    Salinity; ROS; Oxidative stress; Protein carbonylation; Copepods; Acartia tonsa;

    机译：盐度;ROS;氧化应激蛋白质羰基化;pe足类;tons螨;

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