Fine structure of the male genital tract and kidney in the anura Xenopus laevis Daudin, Rana temporaria L. and Bufo bufo L. under normal and experimental conditions

摘要: The ultrastructure of the main cellular components testicular interstitial spaces in three Anuran species was studied during two short periods seasonal cycle and after treatment with 5- 6-hydroxydopamine (5- 6-OHDA). In early December when seminiferous tubules are completely filled resting spermatozoa Rana, Leydig cells display a well developed smooth- rough-surfaced ER, numerous granular vesicles being untypical Mammalian cells, mitochondria tubular cristae only few lipid droplets. late April shortly spermiation has occurred most animals exhibit low degree activity as shown by presence large inclusions, reduced amounts ER vesicles, but increased numbers dense bodies. addition, rather undifferentiated observed. principle, same differences between winter spring seen Bufo, although smooth-surfaced which is partly arranged whorls much more pronounced this whereas lacking. intertubular mitotic figures cells. Xenopus no obvious changes observed As there vesicles. agranular moderately developed. Intratesticular seminal excretory ducts consist all very differentiated almost filaments (∼100 A). Seasonal do not seem to occur. Morphological equivalents for secretory or resorptive processes neither nor around time (in Rana Bufo). At connection site basal laminal labyrinth commonly