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Synthesis of apolar esters by ovaries of the cockroach Periplaneta americana


, : Synthesis of apolar esters by ovaries of the cockroach Periplaneta americana. General and Comparative Endocrinology 70(1): 74-82

Ecdysteroid levels detected by RIA in extracts of mature ovaries from P. americana increased about 4-fold (from 53 to 184 ng/g) on treatment with Helix pomatia 'sulphatase' enzymes. HPLC analysis showed that this increase in immunoreactivity resulted from the hydrolysis of 6 apolar compounds that cochromatographed with the ecdysteroid esters present in newly laid oothecae (A1, A2, A3, A4, A5 and A6).

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Related references

Slinger, A.J.; Isaac, R.E., 1988: Synthesis of apolar ecdysone esters by ovaries of the cockroach Periplaneta americana. Ecdysteroid levels detected by RIA in extracts of mature ovaries from Periplaneta americana increased approximately fourfold (53 +/- 10 to 184 +/- 38 ng/g; +/- SEM, n = 3) on treatment with Helix pomatia "sulphatase" enzymes. HPLC analys...

Xian, Xingfu., 1998: Effects of mating on oviposition, and possibility of parthenogenesis of three domestic cockroach species, the American cockroach, Periplaneta americana; the smoky brown cockroach, Periplaneta fuliginosa; and the German cockroach, Blattella germanica. Periplaneta americana, P. fuliginosa and B. germanica were used to determine the effect of mating on oviposition and the possibility of parthenogenesis. In comparison with mated females, unmated females of P. americana and P. fuliginosa had a long...

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Prabhu, V.K.K.; Hema, P., 1970: Effect of implantation of ovaries in the male cockroach periplaneta americana. In the normal adult male of Periplaneta americana haemolymph protein concentration is lower, neurosecretory cells are completely depleted of secretory material, and the corpora allata are smaller than in the adult female. On receiving adult ovaria...

Sams, G.R.; Cocchiaro, G.F.; Bell, W.J., 1978: Metabolism of juvenile hormone in cultures of ovaries and fat body in the cockroach periplaneta americana. Time course of juvenile hormone (JH) metabolism is examined in cultures of [newly emerged] P. americana fat body and ovaries in medium containing Manduca sexta carrier protein or cockroach hemolymph. In the absence of M. sexta carrier protein or c...

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Sarojini, S.C.akko, T., 1975: Incorporation of acetate-1-14C into lipidsof the ovaries & the fat body of the cockroach Periplaneta americana (Linn.) during oocyte development. Indian journal of experimental biology: 13 (3) 306-307

Sarojini, S.; Chakko, T.V., 1975: Incorporation of acetate-1-12C into lipids of the ovaries & the fat body of the cockroach Periplaneta americana (Linn.) during oocyte development. The incorporation of acetate labelled with 14C into the lipids of the fat-body and ovaries of Periplaneta americana (L.) was studied in females during early and late oogenesis and in vitro and fat-body and ovaries dissected from such females. The...

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