Heat shock puff activity in salivary glands of Drosophila melanogaster larvae during recovery from anoxia at two different temperatures

Abstract

All heat shock puff sites are induced in salivary gland polytene nuclei of D. melanogaster during recovery from anoxia at 24°C. ³H-uridine autoradiographic analysis reveals that the puff at 93D locus is most active in glands recovering from anoxia at 24°C but in glands recovering at 37°C this puff is completely repressed. During recovery from anoxia at 24°C as well as 37°C, the 87C puff is nearly twice as active as its duplicated locus at 87A.