盐度升高对淡水贻贝氧化应激状态的影响

IF 1.3 4区环境科学与生态学 Q3 ECOLOGY

Chemistry and Ecology Pub Date : 2023-01-07 DOI:10.1080/02757540.2022.2163238

Amal Lassoued, Noureddine Khalloufi, Wiem Saidani, A. Khazri, N. Ghanem-Boughanmi, J. Bouayed, M. Ben-Attia

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引用次数: 3

摘要

摘要淡水盐碱化是威胁淡水物种生存的环境挑战。研究了盐度升高对双壳贝氧化状态的影响。在实验室条件下，与对照盐度浓度(0.7)相比，对3种氯化钠(NaCl)浓度(2.5、5和7.5)进行了为期7天的测试，模拟采样现场条件。氧化应激的生物标志物包括超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性以及谷胱甘肽(GSH)和丙二醛(MDA)。此外，评估乙酰胆碱酯酶(AChE)活性，作为神经毒性的标志。结果表明，与对照组相比，最高盐度通过调节CAT活性、GSH和MDA水平，显著扰乱了鱼鳃和消化腺的氧化代谢(p < 0.05)。总的来说，我们的研究表明，水的盐度对union ravoisieri构成了严重的挑战，CAT活性可以作为评估淡水盐碱化对淡水影响的敏感标志。

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Effects of increased salinity on oxidative stress status in the freshwater mussel Unio ravoisieri

ABSTRACT Freshwater salinisation is an environmental challenge that threatens freshwater species survival. We investigated the influence of increased water salinity on the oxidative status in the bivalve Unio ravoisieri. Under laboratory conditions, 3 sodium chloride (NaCl) concentrations (2.5, 5 and 7.5) were tested for 7 days compared to a control salinity concentration (0.7), mimicking sampling site condition. Biomarkers of oxidative stress including superoxide dismutase (SOD) and catalase (CAT) activities and glutathione (GSH) and malondialdehyde (MDA) were assessed in gills and digestive gland. Furthermore, acetylcholinesterase (AChE) activity was assessed, as a marker of neurotoxicity. Findings showed that the highest concentration of salinity has significantly disturbed oxidative metabolism in both gills and digestive gland by modulating the activity of CAT and the levels of GSH and MDA compared to the control condition (all p < 0.05). Moreover, significant enhance of AChE activity has been found in both gills and digestive gland with the three concentrations (all p < 0.05), except for 2.5 in gills (p > 0.05) compared to control condition. Overall, our study has shown that water salinity constitutes a serious challenge for Unio ravoisieri, and that CAT activity could be used as a sensitive marker for the evaluation of the effect of freshwater salinisation on freshwater.

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来源期刊

Chemistry and Ecology 环境科学-环境科学

CiteScore

4.20

自引率

16.00%

发文量

审稿时长

3.7 months

期刊介绍： Chemistry and Ecology publishes original articles, short notes and occasional reviews on the relationship between chemistry and ecological processes. This journal reflects how chemical form and state, as well as other basic properties, are critical in their influence on biological systems and that understanding of the routes and dynamics of the transfer of materials through atmospheric, terrestrial and aquatic systems, and the associated effects, calls for an integrated treatment. Chemistry and Ecology will help promote the ecological assessment of a changing chemical environment and in the development of a better understanding of ecological functions.