Effect of cold exposure on survival and stress protein expression of Drosophila melanogaster at different development stages.

The effect of cold treatment (0 degrees C) on the survival of different developmental stages of the fruit-fly Drosophila melanogaster, and the dynamics of stress protein synthesis in the salivary gland were investigated. It was shown that low temperature stability of the D. melanogaster depended on both the stage of development and the duration of the low temperature influence. The synthesis of new proteins was determined in the cells of the salivary glands of 5-day old larvae after cold treatment. They were distinguished from the heat shock proteins with the exception of the protein with molecular weight 70 kDa.