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Correlation among corpus allatum volume, cell size, and juvenile hormone biosynthesis in ovariectomized adult Blattella germanica


Archives of insect biochemistry and physiology8(1): 37-44
Correlation among corpus allatum volume, cell size, and juvenile hormone biosynthesis in ovariectomized adult Blattella germanica
The corpora allata (CA) of both intact and ovariectomized Blattella germanica adult females exhibited a high degree of bilateral symmetry in the rate of juvenile hormone (JH) biosynthesis, the mean size of CA cells, and gland volume (81.3%, 98.3%, and 100% respectively with less than a twofold difference between the two glands in CA pairs). This permitted us to split each CA pair randomly, measure JH biosynthesis in one gland, and dissociate the other gland into a cell suspension in which the size of CA cells was measured. In ovariectomized females, changes in CA volume and the spontaneous and farnesoic acid (FA)-stimulated rates of JH biosynthesis, measured from the same glands, were well correlated (r = 0.78, for both correlations). Similarly, the mean volume of CA cells in one gland increased in relation to increases in both the spontaneous and FA-stimulated rates of JH biosynthesis by the contralateral member of the pair (r = 0.83 and r = 0.91, respectively). Concurrent changes in CA cell size and activity suggest that in the CA of B. germanica cellular growth and degradation are involved in the regulation of JH biosynthesis.

Accession: 002060780

DOI: 10.1002/arch.940180104

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