Corpora cardiaca(CC)from immature and adult Blaberus discoidalis Serville of both sexes contained approximately equal amounts of activity for the cytochromogenic hormone (CGH), a neurohormone which stimulates cytohaem synthesis in fat body mitochondria on day 4 of adult life.
CGH activity remained at a constant level in the CC of males during days 0 and 1 of adult life, decreased during days 2 and 3, and then returned to the original level by day 4. Female CC followed a similar pattern except that the period of low CGH activity occurred 1 day later.
Variations in early adult feeding patterns or in daily photoperiod did not change the secretory pattern of CGH. However, injections of juvenile hormone III stimulated a precocious release of CGH on days 0–1. Thus, CGH and juvenile hormone may function in this insect as a coordinated endocrine sequence directing metabolic maturation of the fat body during early adult life.
Patterns and Control of Neurosecretion for the Cytochromogenic Hormone in Blaberus Discoidalis Cockroaches
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TIMOTHY K. HAYES, LARRY L. KEELEY; Patterns and Control of Neurosecretion for the Cytochromogenic Hormone in Blaberus Discoidalis Cockroaches. J Exp Biol 1 November 1983; 107 (1): 49–58. doi: https://doi.org/10.1242/jeb.107.1.49
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