Follicle Cell Calmodulin in Blattella germanica: Transcript Accumulation during Vitellogenesis Is Regulated by Juvenile Hormone
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منابع مشابه
Farnesoic Acid-stimulated Rates of Juvenile Hormone Biosynthesis during the Gonotrophic Cycle in Blattella Germanica
Juvenile hormone III biosynthesis in vitro by the corpora allata of adult female Bluttellu germanica is precisely correlated with the gonotrophic cycle. Farnesoic acid-stimulated rates of juvenile hormone synthesis are always higher than the corresponding basal rates, and follow the same pattern of cyclic changes during oijcyte maturation. Both basal and farnesoic acid-stimulated rates decline ...
متن کاملInduction of vitellogenin gene transcription in vitro by juvenile hormone in Blattella germanica.
In the cockroach Blattella germanica, the synthesis of vitellogenin is juvenile hormone III (JH III)-dependent. We have studied the effect of JH III upon vitellogenin gene expression in periovaric fat bodies incubated in vitro. Periovaric fat bodies were obtained from cardioallatectomized females. The response to JH III was measured in terms of vitellogenin and vitellogenin mRNA after 7 h of in...
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Abstract Patterns of juvenile hormone have been intensively studied in the cockroach Blattella germanica under different physiological situations. However, data have been mainly obtained in vitro, and refer to hormone synthesized by isolated corpora allata, whereas information available on hormone concentration in the hemolymph is restricted to adult females. In order to complement our studies ...
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In insects, the transition from juvenile development to the adult stage is controlled by juvenile hormone (JH) synthesized from the corpora allata (CA) glands. Whereas a JH-free period during the last juvenile instar triggers metamorphosis and the end of the growth period, the reappearance of this hormone after the imaginal molt marks the onset of reproductive adulthood. Despite the importance ...
متن کاملCyclic juvenile hormone biosynthesis in the cockroach, Blattella germanica: effects of ovariectomy and corpus allatum denervation.
The corpora allata (CA) of ovariectomized adult Blattella germanica females exhibited delayed but high rates of juvenile hormone biosynthesis in vitro. Using the onset of sexual receptivity as a probe of the degree of CA activation in females, we demonstrated at least one cycle of CA activity in the experimentally synchronized ovariectomized females. Following their activation, the CA exhibited...
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ژورنال
عنوان ژورنال: Developmental Biology
سال: 1995
ISSN: 0012-1606
DOI: 10.1006/dbio.1995.1217