Effects of temperature on mitochondrial function in the Antarctic fish Trematomus bernacchii

被引:77
作者
Weinstein, RB [1 ]
Somero, GN
机构
[1] Univ Arizona, Coll Med, Dept Biochem, Tucson, AZ 85724 USA
[2] Stanford Univ, Hopkins Marine Stn, Dept Biol Sci, Pacific Grove, CA 93950 USA
基金
美国国家科学基金会;
关键词
cold adaptation; mitochondria; stenothermy; temperature; Trematomus bernacchii;
D O I
10.1007/s003600050136
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Effects of temperature on O-2 consumption by mitochondria of the Antarctic fish Trematomus bernacchii were compared with effects obtained with mitochondria from tropical (Sarotheridon mossambica) and temperate zone fishes (Sebastes carnatus and Sebastes mystinus). Arrhenius plots of O-2 consumption versus temperature exhibited slope discontinuities ("breaks") at temperatures (Arrhenius break temperatures: ABTs) reflective of the species' adaptation temperatures. The ABT for mitochondria of T. bernacchii is the lowest reported for any animal and is similar to 12 degrees C below the value predicted by a regression equation based on ABT data for several invertebrates and fishes. The temperature at which the acceptor control ratio (ACR), an index of efficiency of coupling of electron transport to synthesis of ATP, began to decrease with rising temperature also reflected adaptation temperature. The decrease in ACR with rising temperature began at similar to 18 degrees C for mitochondria of T. bernacchii, in contrast to similar to 35 degrees C for mitochondria of Sarotheridon mossambica. Maintaining T. bernacchii at 4 degrees C for 2 weeks led to no changes in ABT or in the response of ACR to temperature. The thermal sensitivities of mitochondria of T. bernacchii reflect the high level of cold adaptation and stenothermy that is characteristic of Antarctic Notothenioid fishes.
引用
收藏
页码:190 / 196
页数:7
相关论文
共 26 条
[11]  
Guderley H, 1996, J EXP BIOL, V199, P1311
[12]  
Guderley H.E., 1996, Society for Experimental Biology Seminar Series, V59, P127
[13]  
JOHNSTON IA, 1984, J COMP PHYSIOL B, V155, P63, DOI 10.1007/BF00688792
[14]  
JOHNSTON IA, 1994, J EXP BIOL, V195, P293
[15]  
Johnston Ian A., 1997, Society for Experimental Biology Seminar Series, V61, P79
[16]  
KAWALL HG, 1998, IN PRESS ANT J
[17]  
LITTLEPAGE JL, 1965, BIOL ANTARCTIC SEAS, V2, P17
[18]   THE PHYSIOLOGY OF MCMURDO SOUND FISHES - CURRENT NEW-ZEALAND RESEARCH [J].
MACDONALD, JA ;
MONTGOMERY, JC ;
WELLS, RMG .
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY, 1988, 90 (03) :567-578
[19]   TEMPERATURE EFFECTS ON PH OF MITOCHONDRIA ISOLATED FROM CARP RED MUSCLE [J].
MOYES, CD ;
BUCK, LT ;
HOCHACHKA, PW .
AMERICAN JOURNAL OF PHYSIOLOGY, 1988, 254 (04) :R611-R615
[20]   ESTIMATING PHYSIOLOGICAL THRESHOLDS WITH CONTINUOUS 2-PHASE REGRESSION [J].
NICKERSON, DM ;
FACEY, DE ;
GROSSMAN, GD .
PHYSIOLOGICAL ZOOLOGY, 1989, 62 (04) :866-887