|
KMID : 0381920010310030245
|
|
Korean Journal of Microscopy
2001 Volume.31 No. 3 p.245 ~ p.256
|
|
|
Fine Structure of the Spermatogenic Cells during the Spermiogenesis of Paradoxornis webbiana
|
|
Lee Jung-Hun
Hahm Kyu-Hwang
|
|
|
Abstract
|
|
|
|
The morphological characteristics of spermatogenic cells during the spermiogenesis of Paradoxornis webbiana were studied by transmission electron microscope. Spermiogenesis of P. webbiana was divided into ten phase. The chromatin granules became fibrous granules at the Golgi phase, gradually condensed at the cap phases, condensed as a stick at the acrosomal phase, and finally, a perfect nucleus was formed at the maturation phase. The formation of sperm tail began at the early Golgi phase, and completed at the late maturation phase. In particular, the dense materials existed in the sperm neck, which is wedged between the tip of segmented columns and the first mitochondria of the middle piece. The axone in the neck were surrounded by the dense materials. The axonema in spermatozoon contains a 9+2 arrangement of microtubules: 9 doublets, and 2 central single microtubules. Mitochondrial bundles of middle piece were composed of a pair of arms, which surrounded the axone of the middle piece by the $15^{\circ}$ angled-helical structure. The outer membrane of mitochondria were surrounded by microtubules in plasma membrane of the sperm. The undulating membrane had a helical structure, and the sperm plasma membrane was surrounded by undulating membrane.
|
|
|
KEYWORD
|
|
|
Dense material, Microtubule, Paradoxornis webbiana, Spermiogenesis, Undulating membrane
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
|
|