mitochondria
- Increased glucocorticoid concentrations in early life cause mitochondrial inefficiency and short telomeres
Summary: Experimental simulation of natural stressful developmental conditions reveals that glucocorticoid hormones induce telomere shortening by decreasing mitochondrial efficiency without altering oxidative stress, suggesting that telomeres are costly to maintain.
- Stable mitochondrial CICIII2 supercomplex interactions in reptiles versus homeothermic vertebrates
Summary: The stability of supercomplexes of mitochondrial electron transport chain complexes I and III varies among vertebrates and is greatest in poikilothermic reptiles and weakest in endotherms.
- Mitochondrial thermo-sensitivity in invasive and native freshwater mussels
Summary: Contrary to previous beliefs, invasive aquatic ectotherms do not always possess more thermo-tolerant mitochondria than their endemic counterparts.
- Early feeding of rainbow trout (Oncorhynchus mykiss) with methionine-deficient diet over a 2 week period: consequences for liver mitochondria in juveniles
Summary: A potential role for methionine in the application of new feeding strategies, such as nutritional programming, to optimize the nutrition and health of farmed fish.
- Mitochondrial genotype influences the response to cold stress in the European green crab, Carcinus maenas
Summary: Different mitochondrial haplotypes of Carcinus maenas in the Gulf of Maine, derived from multiple biological introductions, have a strong, male-specific effect on whether invasive crabs can right themselves under cold stress, while two candidate nuclear loci have no such effect.
- Turtles maintain mitochondrial integrity but reduce mitochondrial respiratory capacity in the heart after cold acclimation and anoxia
Summary: Inhibition of mitochondrial respiration rate and production of reactive oxygen species during cold acclimation and anoxia, while preserving mitochondrial content and morphology, is central to the anoxia tolerance of freshwater turtle hearts.
- Mitochondrial plasticity in the cerebellum of two anoxia-tolerant sharks: contrasting responses to anoxia/re-oxygenation
Highlighted Article: The brain mitochondria of reef sharks reveal some adaptations that parallel their contrasted physiological strategies to cope with environmental oxygen deprivation.
- Interspecific variation in brain mitochondrial complex I and II capacity and ROS emission in marine sculpins
Summary: We show relationships between hypoxia tolerance and mitochondrial complex I and II flux capacities in marine sculpins that were not directly related to variation in ROS emission.
- Subspecies differences in thermal acclimation of mitochondrial function and the role of uncoupling proteins in killifish
Summary: Changes in mitochondrial capacity, proton leak, uncoupling protein expression and fatty-acid-induced uncoupling with cold acclimation are greater in a putatively cold-adapted northern population of killifish compared with a southern population.
- Scaling of morphology and ultrastructure of hearts among wild African antelope
Summary: Wild African antelope show proportionality between capillary and mitochondrial investments of the heart, indicating economy of design at the cellular level of the oxygen cascade in an aerobic organ.