[The effect of prolonged exposure to heat on the activity of salivary gland polytene chromosomes].
The influence of long-term heating on the puffing activity of polytene chromosomes in the early prepupa salivary glands was investigated. The activity of puffs was estimated by two criteria: size and frequency. The rearing of insects at a temperature of 29 degrees resulted in puff changes: the activity of some puffs increased or depressed, some puffs were inhibited, other puffs were induced newly. The differential response of each chromosome was observed. A possible mechanism of the effect of heating on the puff activity of polytene chromosomes is discussed.
D000818:Animals; D002875:Chromosomes / Q000502:physiology*; D004331:Drosophila melanogaster / Q000502:physiology; D006358:Hot Temperature; D013997:Time Factors
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