The hormonal content of the locust corpus cardiacum |
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Authors: | G J Goldsworthy W Mordue R A Johnson |
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Institution: | (1) Department of Zoology, University of Hull, London;(2) Department of Zoology, Imperial College, London |
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Abstract: | Summary The amounts of adipokinetic and diuretic hormone in the separate storage and glandular lobes of the locust corpora cardiaca
during the imaginal moult and up to the onset of sexual maturation have been measured. The levels of the hormones are high
prior to the imaginal moult, fall at emergence and increase during the somatic growth period. The effects of surgical interference
with the neuroendocrine system upon the hormonal content of the corpora cardiaca have been investigated. Cautery of the brain
neurosecretory cells or allatectomy in mature locusts has no effect on the content of adipokinetic hormone. Diuretic hormone
is absent from the storage lobes of locusts deprived of their cerebral neurosecretory cells but normal levels are present
in the corpora cardiaca of allatectomised animals. Severance of the nervus corporis cardiacum I and II reduces the level of
diuretic hormone in the storage lobes of the corpora cardiaca but is without effect on the levels of adipokinetic hormone
in the glandular lobes.
This work is supported by grants from the Science Research Council and the Royal Society. |
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