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First published online June 6, 2005
Journal of Experimental Biology 208, 2409-2420 (2005)
Published by The Company of Biologists 2005
doi: 10.1242/jeb.01632

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Temperature-dependent protein synthesis capacities in Antarctic and temperate (North Sea) fish (Zoarcidae)

Daniela Storch^*, Gisela Lannig and Hans O. Pörtner

Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany

View larger version (27K): [in a new window]   Fig. 1. RNA (A, white muscle; D, gill), protein (B, white muscle; E, gill) concentrations and RNA:protein ratios (C, white muscle; F, gill) in P. brachycephalum under control conditions (0°C; left, black bars), in warm-acclimated P. brachycephalum (5°C; left, grey bars), in cold-acclimated Z. viviparus (5°C; right, grey bars) and in control Z. viviparus (10°C; right, white bars). Values are means ± S.E.M. (N=6). Only the same tissues were tested for the significance of differences. Values with the same letter are significantly different. FM, fresh mass.

View larger version (19K): [in a new window]   Fig. 2. Time course of incorporation of [2,3,4,5,6-3H]Phe into trichloroacetic acid-precipitable protein at different temperatures by cell-free lysates prepared from gills of control P. brachycephalum maintained at 0°C. filled circles: 0°C; open circles: 5°C; filled triangles: 10°C; open diamonds: 15°C. Values are means ± S.E.M. (N=5).

View larger version (24K): [in a new window]   Fig. 3. Temperature-dependent protein synthesis capacities in lysates prepared from white muscle (A,C) and gills (B,D) of P. brachycephalum (A,B) and Z. viviparus (C,D) acclimated to various temperatures. Closed circles: control P. brachycephalum maintained at 0°C; open circles: warm-acclimated P. brachycephalum (5°C); closed squares: control Z. viviparus maintained at 10°C; open squares: cold-acclimated Z. viviparus (5°C). Values are means ± S.E.M. (control and warm-acclimated P. brachycephalum N=5; control Z. viviparus N=3; cold-acclimated Z. viviparus N=4).

View larger version (23K): [in a new window]   Fig. 4. Temperature-dependent RNA translational capacities in lysates prepared from white muscle (A,C) and gills (B,D) of P. brachycephalum (A,B) and Z. viviparus (C,D) acclimated to various temperatures. Closed circles: control P. brachycephalum maintained at 0°C; open circles: warm-acclimated P. brachycephalum (5°C); closed squares: control Z. viviparus maintained at 10°C; open squares: cold-acclimated Z. viviparus (5°C). Values are means ± S.E.M. (control and warm-acclimated P. brachycephalum N=5; control Z. viviparus N=3; cold-acclimated Z. viviparus N=4).

View larger version (20K): [in a new window]   Fig. 5. Temperature-dependent RNA translational capacities (A) and protein synthesis capacities (B) in lysates prepared from white muscle of warm-acclimated P. brachycephalum and of cold-acclimated Z. viviparus. RNA translational capacities were from data in Fig. 4 and protein synthesis capacities from Fig. 3. Open circles: warm-acclimated P. brachycephalum maintained at 5°C; open squares: cold-acclimated Z. viviparus maintained at 5°C. Values are means ± S.E.M. (warm-acclimated P. brachycephalum N=5; cold-acclimated Z. viviparus N=4).

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