AN AUTORADIOGRAPHIC STUDY OF ENDOCRINE ACTIVITY FOLLOWING FRONTAL GANGLIONECTOMY IN VIRGIN FEMALES OFMELANOPLUS SANGUINIPES(ORTHOPTERA: ACRIDIDAE)

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Abstract
The synthetic ability of type-A neurosecretory cells (NSC) and corpus allatum (CA) was investigated autoradiographically in both normal virgin females and those from which the frontal ganglion had been removed. Incorporation of3H-cystine and3H-uridine into the NSC was significantly lower in frontal ganglionectomized insects than in controls. There appeared to be no relationship between the level of isotope uptake and the amount of stainable material in the NSC. Ability of the CA to incorporate3H-uridine seemed unaffected by the operation.