Cytological changes in the pars distalis of pituitary of the green frog, Rana esculenta L., during the reproductive cycle.

摘要: The cytological changes in the pars distalis of pituitary male and female green frog, Rana esculenta during reproductive cycle have been studied by examining form, cytoplasmic granulation numerical proportions different cell types. Some sex differences were recorded, particularly relative total number cells a median sagittal section distalis. No extensive occur hibernation period, but there are striking alterations at time spring awakening, spawning months replenishment spent gonads i.e. late summer autumn months. Important to be observed acidophils type one (A1) basophils two (B2) three (B3). Changes A1 breeding season speculated as being support activity animal. B2 exhibit most profound which correlate precisely with morphological gonads, these considered FSH-gonadotrops. functional significance B3 is discussed it suggested that they might source an ICSH- or LH-like hormone.