Collected reprints: Abstract 2531

Collected reprints

Abstract

Abatzopoulos, Th.; Triantaphyllidis, G.; Sorgeloos, P.; Clegg, J.S. (1994). International study on Artemia : 48. Evidence for the induction of cyst diapause by heat-shock in Artemia. J. Crust. Biol. 14(2): 226-230

The brine shrimp Artemia produces embryos (cysts) in a state of obligate dormancy called diapause. Diapause is terminated by a variety of treatments, including dehydration. Previous work suggested that some cysts can be induced to reenter diapause when exposed to prolonged anoxia. Results presented in this paper indicate that heat shock (42-43°C) can also lead to diapause induction. The basis for this proposal is the finding that the final hatching level of heat-shocked cysts is increased by a post-heat dehydration, a treatment known to terminate diapause. The respiration rate of postheat-shocked cysts was found to be much lower than controls. Electrophoretic profiles of proteins in extracts from control and heatshocked cysts suggest that the intracellular translocation of the major protein accompanies heat shock.

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