Metabolomic profiling of rapid cold hardening and cold shock in Drosophila melanogaster

2007 ◽  
Vol 53 (12) ◽  
pp. 1218-1232 ◽  
Author(s):  
Johannes Overgaard ◽  
Anders Malmendal ◽  
Jesper G. Sørensen ◽  
Jacob G. Bundy ◽  
Volker Loeschcke ◽  
...  

1990 ◽  
Vol 148 (1) ◽  
pp. 245-254 ◽  
Author(s):  
M. C. Czajka ◽  
R. E. Lee

In studies of insect cold-hardiness, the supercooling point (SCP) is defined as the temperature at which spontaneous nucleation of body fluids occurs. Despite having an SCP of −20 degrees C, adults of Drosophila melanogaster did not survive exposure to −5 degrees C, which suggests that cold shock causes lethal injury that is not associated with freezing. If, however, flies were chilled at 5 degrees C, for as little as 30 min, approximately 50% of the flies survived exposure to −5 degrees C for 2h. This capacity to cold-harden rapidly was greatest in 3- and 5-day-old adults. The rapid cold-hardening response was also observed in larvae and pupae: no larvae survived 2 h of exposure to −5 degrees C, whereas 63% pupariated if chilled at 5 degrees C before subzero exposure. Similarly, although exposure of pupae to −8 degrees C was lethal, if pre-chilled at 5 degrees C 22% eclosed. This extremely rapid cold-hardening response may function to allow insects to enhance cold-tolerance in response to diurnal or unexpected seasonal decreases in environmental temperature.



Cryobiology ◽  
1988 ◽  
Vol 25 (6) ◽  
pp. 546 ◽  
Author(s):  
M.C. Czajka ◽  
R.E. Lee


1987 ◽  
Vol 60 (3) ◽  
pp. 297-304 ◽  
Author(s):  
Cheng-Ping Chen ◽  
David L. Denlinger ◽  
Richard E. Lee








APOPTOSIS ◽  
2007 ◽  
Vol 12 (7) ◽  
pp. 1183-1193 ◽  
Author(s):  
Shu-Xia Yi ◽  
Clifford W. Moore ◽  
Richard E. Lee




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