ISSN:
1432-136X
Schlagwort(e):
Heat-shock proteins
;
Thermotolerance
;
Thermosensitivity
;
Fly, Sarcophaga crassipalpis
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
,
Medizin
Notizen:
Abstract When pharate adults of the flesh fly Sarcophaga crassipalpis are exposed to 40°C for 4 h they become more tolerant of high temperatures that are normally lethal (thermotolerance). In contrast, a 1-h exposure to 45°C decreases tolerance to a subsequent high temperature challenge (thermosensitivity). While control flies experience little mortality when held at 35°C for 24–48 h the thermosensitized flies die when exposed to 35°C. Sensitivity to a second thermal challenge slowly decays over a 72-h period. The acquisition of thermotolerance prevents the development of thermosensitivity. Brains from thermosensitized flies cultured at 43°C express the 72-kDa heat-shock protein and normal protein synthesis is inhibited. This implies that development of thermosensitivity is not associated with a loss in the capacity to express the 72-kDa heat-shock protein.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00263595
