PHOTOPERIODIC CONTROL OF A PHYSIOLOGICAL RHYTHM

摘要: 1. In mature diapausing larvae of the European corn borer, Ostrinia nubilalis (Hubner), epithelial cells anterior portion proctodeum were observed to show evidence a regular cycle synthesis and secretion. The involved progressive accumulation subsequent disappearance paraldehyde-positive, autofluorescent cytoplasmic inclusions. For purposes this study, secretory was divided into series 5 arbitrary stages.2. proctodeal activity shown constitute rhythmic function. rhythm found be non-circadian, in that it displayed an approximately 8-hour period, such three complete cycles occurred during each 24-hour day.3. phase-set by photoperiod. release secretions (loss intracellular granules) response beginning scotophase (lights-off stimulus) endogenously every 8 hours thereafter.4. A thermoperiod superimp...