Место издания:Nova Science Publishers, Inc New York
Первая страница:109
Последняя страница:126
Аннотация:During spermatogenesis, including the final stage of spermiogenesis in mammals, the distal centriole disappears with only the proximal centriole being retained in the mature spermatozoon. The distal centriole in the early spermatid gives rise to the flagella, and the proximal centriole produces a unique microtubule-containing structure - a centriolar adjunct. Unlike the flagellum, the centriolar adjunct does not contain central microtubules, and its peripheral doublets an addition incomplete « C » microtubule . In the mature spermatozoon, the centriolar adjunct is disassembled. Currently, the question “which centrioles of spermatid - mother or daughter - gives rise to the flagella” is not clarified. Using transmission electron microscopy on the serial ultrathin sections of porcine spermatids at various stages of maturation we showed in present work that the spermatozoon flagella is a derivative of daughter (but not mother) centriole of spermatid.
