作者
Anneli Strobel, Elettra Leo, Hans O Pörtner, Felix C Mark
发表日期
2013/9/30
期刊
Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology
卷号
166
期号
1
页码范围
48-57
出版商
Pergamon
简介
Mitochondrial plasticity plays a central role in setting the capacity for acclimation of aerobic metabolism in ectotherms in response to environmental changes. We still lack a clear picture if and to what extent the energy metabolism and mitochondrial enzymes of Antarctic fish can compensate for changing temperatures or PCO2 and whether capacities for compensation differ between tissues. We therefore measured activities of key mitochondrial enzymes (citrate synthase (CS), cytochrome c oxidase (COX)) from heart, red muscle, white muscle and liver in the Antarctic fish Notothenia rossii after warm- (7 °C) and hypercapnia- (0.2 kPa CO2) acclimation vs. control conditions (1 °C, 0.04 kPa CO2). In heart, enzymes showed elevated activities after cold-hypercapnia acclimation, and a warm-acclimation-induced upward shift in thermal optima. The strongest increase in enzyme activities in response to hypercapnia …
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A Strobel, E Leo, HO Pörtner, FC Mark - Comparative Biochemistry and Physiology Part B …, 2013