"Effect of environmental temperature on mitochondrial ß oxidation activity in gills and hepatopancreas of the fresh water shrimp Macrobrachium borellii

IRAZU, C.E.; GONZALEZ BARO, M.R.; POLLERO, R.J.

COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART B, BIOCHEMISTRY & MOLECULAR BIOLOGY.

ELSEVIER SCIENCE INC

Lugar: Amsterdam; Año: 1992 vol. 102B p. 721 - 725

1096-4959

1. To elucidate the effect of environmental temperature on mitochondrial palmitic (16:0) and oleic (18:1 n-9) fatty acid fl-oxidation of the freshwater shrimp Macrobrachium borellii, groups of animals were maintained at 11 and 29°C, respectively.2. These are the extreme temperatures of the water stream that they inhabit. After 21 days of acclimation, gills and hepatopancreas mitochondria were isolated and their oxidative capabilities were measured.3. There were no significant changes in mitochondrial fatty acid beta-oxidation activity in gills and hepatopancreas of animals acclimated at l l°C, compared with controls (16-20°C)4. An increment in the fatty acid fl-oxidation in those animals acclimated at 29°C was observed. It was several-fold higher compared to controls.5. Acclimation affects the optimal temperature for beta-oxidation specific activity.6. There were no differences in the lipid rotational mobility (r) of mitochondrial membranes as a consequence of temperature acclimation.