ISSN:
1432-0878
Keywords:
Calliphora
;
Fat body
;
Specific-protein secretion granules
;
Ovariectomy
;
β-Ecdysone
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary During the first four days of the imaginai stage the fat cells of ovariectomized females of Calliphora develop a protein synthetic apparatus, and produce dense bodies (lysosomes) as do the fat cells of normal females, but apparently they cannot synthesize the protein secretion granules that characterize the productive phase of the fat cells of normal females and that we believe to represent vitellogenin. Injection of ovariectomized females with β-ecdysone restored the ability of the fat cells to produce the secretion granules. It is suggested that the ovary gives off a factor which induces the production of the protein secretion granules by the fat cells, and that the factor from the ovary can be substituted by β-ecdysone. This, we believe, is the first ultrastructural evidence for an effect of the ovary and of β-ecdysone on the synthesis of specific protein.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00221598
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