Ultrastructure of spermatozoon in soft-shelled turtle {\sl Trionyx sinensis}

摘要: Ultrastructure of spermatozoon in soft-shelled turtle Trionyx sinensis was examined by transmission electron microscope. The mature is vermiform shape, which consists a head, connecting piece, middle principal piece and end similar morphology to that the turtles, Chrysemys picta Chimemys reevesii. However, several structures are unique. In acrosomal complex covers anterior protrusion nucleus, where there narrow lucent space between subacrosomal cone outer cap. 3 - 5 intranuclear tubules go through tow-thirds nucleus their central cores extend towards perforatorial rods. located concave implantation fossa caudal nucleus. mitochondrial sheath composed concentric mitochondria arranged 7 8 circles each contains mitochondria. Concentric layers mitochondrion double-membranes they cristae mitochondriales actually. lots glycogens show relationship vitality maintaining during long-time storage turtle. structural modal proximal centriole 9 × ＋ 0, typical nine triplet microtubules arrange pinwheel fashion surrounded dense material. By comparison, distal 2, embed fibers respectively. stands vertically one. There wedge-shaped annulus around mitochondriall sheath. axonemal circumferential fibars, obviously produces fibrous reducing backward gradually thickness. posses model 2 two thick corresponding No. doublet respectively, merge with On transection dynein arms attached A microtubule connected an obvious radial spoke. Two mi- crotubules linked bridging substance. only cell membrane, dispersed gradually. characteristics above were different evidently from other class animals or order reptile.