Tissue- and species-specific features of superoxide dismutase (SOD) and catalase activity, as well as levels of thiobarbituric acid reactive substances (TBARS), were investigated in the hepatopancreas, gills and foot of the three Black Sea bivalve mollusks—lagoon cockle Cerastoderma glaucum, mussel Mytilus galloprovincialis and blood clam Anadara kagoshimensis—sharing high natural oxidative stress tolerance. Cockle tissues displayed a far lower TBARS level compared to that in the mussel and blood clam, with values increasing in the following sequence: cockle–clam–mussel. Of the three bivalve species, a highest activity of both antioxidant enzymes was detected in all cockle tissues. The blood clam and lagoon cockle, as burrowing mollusks, shared a similar tissue specificity and displayed a highest activity of both enzymes in the gills. The blood clam was appreciably superior to the mussel as to SOD and catalase activity in the gills but inferior in terms of SOD activity in the hepatopancreas and foot. The revealed features reflect a different oxidative stress tolerance of the bivalves studied in their natural habitats. A highest oxidative stress sensitivity was found in the mussel. By contrast, the lagoon cockle was distinguished by a highest oxidative stress tolerance, while the blood clam occupied an intermediate position. These species-specific features enable mollusks to successfully adapt to oxidative stress which typically occurs in benthic biotopes of the Black Sea.

中文翻译：

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黑海双壳类软体动物 Cerastoderma glaucum (Bruguière, 1789)、Anadara kagoshimensis (Tokunaga, 1906) 和 Mytilus galloprovincialis Lam 组织中的超氧化物歧化酶和过氧化氢酶活性。与适应栖息地有关

在三种黑海双壳类软体动物——泻湖鸟蛤 Cerastoderma 的肝胰腺、鳃和足中研究了超氧化物歧化酶 (SOD) 和过氧化氢酶活性的组织和物种特异性特征，以及硫代巴比妥酸活性物质 (TBARS) 的水平glaucum、贻贝 Mytilus galloprovincialis 和血蛤 Anadara kagoshimensis——共享高的天然氧化应激耐受性。与贻贝和血蛤相比，海扇组织显示出低得多的 TBARS 水平，值按以下顺序增加：海扇-蛤-贻贝。在三种双壳类动物中，在所有海扇组织中检测到两种抗氧化酶的活性最高。血蛤和泻湖海扇作为穴居软体动物，具有相似的组织特异性，并在鳃中显示出两种酶的最高活性。在鳃中的 SOD 和过氧化氢酶活性方面，血蛤明显优于贻贝，但在肝胰腺和足中的 SOD 活性方面​​较差。揭示的特征反映了在其自然栖息地中研究的双壳类动物的不同氧化应激耐受性。在贻贝中发现了最高的氧化应激敏感性。相比之下，泻湖海扇的氧化应激耐受性最高，而血蛤则处于中间位置。这些物种特有的特征使软体动物能够成功地适应通常发生在黑海底栖生物群落中的氧化应激。揭示的特征反映了在其自然栖息地中研究的双壳类动物的不同氧化应激耐受性。在贻贝中发现了最高的氧化应激敏感性。相比之下，泻湖海扇的氧化应激耐受性最高，而血蛤则处于中间位置。这些物种特有的特征使软体动物能够成功地适应通常发生在黑海底栖生物群落中的氧化应激。揭示的特征反映了在其自然栖息地中研究的双壳类动物的不同氧化应激耐受性。在贻贝中发现了最高的氧化应激敏感性。相比之下，泻湖海扇的氧化应激耐受性最高，而血蛤则处于中间位置。这些物种特有的特征使软体动物能够成功地适应通常发生在黑海底栖生物群落中的氧化应激。