Thermal acclimation without heat shock, and motor responses to a sudden temperature change in Asellus aquaticus

Goldfish maintained under controlled photoperiods for 6 weeks or longer were relatively more resistant to a sudden elevation in temperature when the daily photoperiods had been long (16 hours) and relatively more resistant to sudden chilling when they had been short (8 hours). The magnitude of the effect varied with the season. Thyroid activity was slightly greater in fish maintained under the shorter photoperiods. The longer photoperiods stimulated more rapid growth of ovaries during late winter and early spring. The endocrine system is considered a link in the chain of events regulating seasonal variations in resistance to sudden temperature change.

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Thermal acclimation alters both basal heat shock protein gene expression and the heat shock response in juvenile lake whitefish (Coregonus clupeaformis)

Journal of Thermal Biology ◽

10.1016/j.jtherbio.2021.103185 ◽

2022 ◽

pp. 103185

Author(s):

Lori A. Manzon ◽

Megan A. Zak ◽

Matthew Agee ◽

Douglas R. Boreham ◽

Joanna Y. Wilson ◽

...

Keyword(s):

Gene Expression ◽

Heat Shock ◽

Heat Shock Protein ◽

Heat Shock Response ◽

Protein Gene ◽

Thermal Acclimation ◽

Coregonus Clupeaformis ◽

Lake Whitefish ◽

Heat Shock Protein Gene ◽

Shock Response

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Thermal acclimation changes DNA-binding activity of heat shock factor 1(HSF1) in the gobyGillichthys mirabilis: implications for plasticity in the heat-shock response in natural populations

Journal of Experimental Biology ◽

10.1242/jeb.205.20.3231 ◽

2002 ◽

Vol 205 (20) ◽

pp. 3231-3240 ◽

Cited By ~ 6

Author(s):

Bradley A. Buckley ◽

Gretchen E. Hofmann

Keyword(s):

Gene Expression ◽

Heat Shock ◽

Heat Shock Response ◽

Environmental Control ◽

Heat Shock Factor ◽

Thermal Acclimation ◽

Model Systems ◽

Threshold Temperature ◽

Heat Shock Factor 1 ◽

Shock Response

SUMMARYThe intracellular build-up of thermally damaged proteins following exposure to heat stress results in the synthesis of a family of evolutionarily conserved proteins called heat shock proteins (Hsps) that act as molecular chaperones, protecting the cell against the aggregation of denatured proteins. The transcriptional regulation of heat shock genes by heat shock factor 1(HSF1) has been extensively studied in model systems, but little research has focused on the role HSF1 plays in Hsp gene expression in eurythermal organisms from broadly fluctuating thermal environments. The threshold temperature for Hsp induction in these organisms shifts with the recent thermal history of the individual but the mechanism by which this plasticity in Hsp induction temperature is achieved is unknown. We examined the effect of thermal acclimation on the heat-activation of HSF1 in the eurythermal teleost Gillichthys mirabilis. After a 5-week acclimation period (at 13, 21 or 28°C) the temperature of HSF1 activation was positively correlated with acclimation temperature. HSF1 activation peaked at 27°C in fish acclimated to 13°C, at 33°C in the 21°C group, and at 36°C in the 28°C group. Concentrations of both HSF1 and Hsp70 in the 28°C group were significantly higher than in the colder acclimated fish. Plasticity in HSF1 activation may be important to the adjustable nature of the heat shock response in eurythermal organisms and the environmental control of Hsp gene expression.

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Transient Heat Conduction in Elliptical Plates and Cylinders

Journal of Heat Transfer ◽

10.1115/1.4008132 ◽

1959 ◽

Vol 81 (1) ◽

pp. 54-58 ◽

Cited By ~ 9

Author(s):

E. T. Kirkpatrick ◽

W. F. Stokey

Keyword(s):

Heat Conduction ◽

Temperature Change ◽

Outer Surface ◽

Digital Computer ◽

Numerical Evaluation ◽

Initial Temperature ◽

Transient Heat Conduction ◽

Elliptical Cylinder ◽

Mathieu Functions ◽

Sudden Temperature Change

In 1945, N. W. McLachlan published the equations governing the problem of heat conduction in a long elliptical cylinder, including the solution for the case of a cylinder with a uniform initial temperature, subject to a sudden temperature change at the outer surface of the cylinder. This paper describes the numerical evaluation of McLachlan’s solution by the use of a digital computer and includes a table of the necessary zeros of the modified Mathieu functions. Tables of the temperatures in cylinders with eccentricities of 0.6, 0.7, 0.8, and 0.9 are given.

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