Trigari G, Pirini M, Ventrella V, Pagliarani A, Trombetti F, Borgatti A R
Department of Biochemistry, University of Bologna, Italy.
Lipids. 1992 May;27(5):371-7. doi: 10.1007/BF02536152.
The response to cold of liver and heart membrane lipid composition and mitochondrial respiration in reared sea bass (Dicentrarchus labrax L.) was investigated. Fish acclimation was followed during the natural seasonal cycle from August to March. The data on the fatty acid composition of liver and heart polar lipids and on total lipids of liver mitochondria and microsomes did not indicate any increase in unsaturation in response to cold. The enzyme complexes of the liver and heart mitochondrial respiratory chain showed a repeated negative compensation for cold acclimation. The constancy of the break in the Arrhenius plot of liver cytochrome oxidase (EC 1.9.3.1) was consistent with the lack of homeoviscous adaptation of membrane lipids. A thermoadaptive strategy based on the reduction of sea bass metabolic activity is suggested.
研究了养殖海鲈（欧洲鲈，Dicentrarchus labrax L.）肝脏和心脏膜脂质组成及线粒体呼吸对低温的反应。在8月至3月的自然季节周期内对鱼类进行了驯化。肝脏和心脏极性脂质的脂肪酸组成以及肝脏线粒体和微粒体总脂质的数据并未表明对低温有任何不饱和增加的反应。肝脏和心脏线粒体呼吸链的酶复合物对低温驯化表现出反复的负补偿。肝脏细胞色素氧化酶（EC 1.9.3.1）的阿伦尼乌斯图中断点的恒定与膜脂质缺乏适应性粘性一致。提出了一种基于降低海鲈代谢活性的热适应策略。
