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Steroid synthesizing cellular sites in the ovaries of Calotes versicolor (Daud.), Hemidactylus flaviviridis (Ruppel) & Chamaeleon calcaratus (Boulenger): histochemical study.


 A histochemical study of steroid synthesizing cellular sites in the ovaries of Calotes versicolor (Daud.), Hemidactylus flavivirdes (Ruppel) and Chamaeleon calcaratus (Boulenger) is discussed. THe distribution of delta 5-3beta-hydroxysteroid dehydrogenase, 17beta-hydroxysteroid dehydrogenase, 11beta-hydroxysteroid dehydrogenase, glucose-6phosphate dehydrogenase, isocitrate dehydrogenase, lactate dehydrogenase and reduced nicotinamide-adenine dinucleotide diaphorase enzyme activities was studied in ovaries of the 3 species of lizards. All the enzyme activities occurred in 1) patches of cells of theca interna; 2) granulosa cells of large preovulatory, postovulatory, and atretic follicles; 3) interstitial cells of the ovarian stroma; and in the 4) ooplasm of the growing oocyte, suggesting their steroidogenic capacity. It was observed that following completion of follicular atresia, the phagocytic granulosa cells degenerate and the remaining cells of theca interna contribute to the formation of interstitial gland cells.
