[The dynamics of the induction and regression of puffs 87A, 87C and 93D in the polytene chromosomes of Drosophila melanogaster under the action of anoxia and high temperature].
A study was made of the heat shock puff activity in salivary glands of Drosophila melanogaster larvae after 5 and 20 min treatments with anoxia (dipping into physiological solution), heat shock (37 degrees C), and simultaneously with both the agents. The simultaneous treatment with heat shock and anoxia, as well as treatment with anoxia only blocked the induction of heat shock puffs. They appeared 10-15 min after the treatment during recovery under aerobic conditions. There was a super-additive effect of the simultaneous treatment on the heat shock puffing duration. A specific regulation of the 93D locus was observed. The 93D puff was induced by a 5 min simultaneous treatment with anoxia and heat shock and, as a rule, was not induced by the analogous 20 min treatment. The role of anoxia in blocking heat shock puff induction under simultaneous effects of heat shock and anoxia is discussed.
Mamon
L A
LA
Kutskova
Iu A
IuA
D000818:Animals; D015687:Cell Hypoxia; D002875:Chromosomes / Q000648:ultrastructure*; D004331:Drosophila melanogaster; D006358:Hot Temperature; D007814:Larva; D012469:Salivary Glands / Q000648:ultrastructure; D013696:Temperature; D013997:Time Factors
Dinamika induktsii i regressii puffov 87A, 87C i 93D v politennykh khromosomakh drozofily Drosophila melanogaster pri deĭstvii anoksii i vysokoĭ temperatury.