Abstract
Exposure of Drosophila melanogaster larvae to high temperature for short periods of time results in marked changes in the puffing patterns of salivary gland chromosomes. Temperature shock “induces” puffing at 9 specific loci; this pattern of induced puffs shows little developmental specificity and is similar in three strains of D. melanogaster (including the mutant lethal giant-larvae) and in D. simulans. Temperature shock also (i) retards the regression of some developmentally specific puffs and (ii) results in the regression of all other puffs normal to development. The effect of temperature treatment is similar in vivo and after in vitro treatment of salivary glands. The in vitro response is not sensitive to cycloheximide. A similar pattern of induced puffs to that found after temperature treatment is found during recovery of larvae from anoxia, but additional puffs are “induced” after anoxia. The size and duration of activity of the induced puffs is dependent upon the magnitude of the treatment.
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Ashburner, M. Patterns of puffing activity in the salivary gland chromosomes of Drosophila . Chromosoma 31, 356–376 (1970). https://doi.org/10.1007/BF00321231
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DOI: https://doi.org/10.1007/BF00321231