TY - JOUR
T1 - Ultrastructural and histological study of oogenesis and oocyte degeneration in the penshell atrina maura (Bivalvia
T2 - Pinnidae)
AU - Camacho-Mondragón, Marian A.
AU - Ceballos-Vázquez, Bertha P.
AU - Uría-Galicia, Esther
AU - López-Villegas, Edgar O.
AU - Pipe, Richard
AU - Arellano-Martínez, Marcial
PY - 2015/12/1
Y1 - 2015/12/1
N2 - The successive stages of oogenesis and the changes involved in the oocyte degeneration process in the penshell Atrina maura were examined using light and transmission electron microscopy. The ovarian maturation process is asynchronous, as oocytes at different developmental stages can be found simultaneously. Oocytes develop from oogonia and then undergo three distinct stages of oogenesis: previtellogenesis, vitellogenesis and postvitellogenesis with mature oocytes. Atrina maura displays a solitary oogenesis type, in which follicular cells become associated with oocytes from the earliest stages of development and seem to play an integral role in vitellogenesis. The cytoplasm of vitellogenic oocytes contains numerous whorls of rough endoplasmic reticulum and Golgi bodies, suggesting that auto-synthetic vitellogenesis may occur in this species. In addition, the degeneration process of postvitellogenic oocytes triggered by a seasonal increase in water temperature (> 25°C) is described.
AB - The successive stages of oogenesis and the changes involved in the oocyte degeneration process in the penshell Atrina maura were examined using light and transmission electron microscopy. The ovarian maturation process is asynchronous, as oocytes at different developmental stages can be found simultaneously. Oocytes develop from oogonia and then undergo three distinct stages of oogenesis: previtellogenesis, vitellogenesis and postvitellogenesis with mature oocytes. Atrina maura displays a solitary oogenesis type, in which follicular cells become associated with oocytes from the earliest stages of development and seem to play an integral role in vitellogenesis. The cytoplasm of vitellogenic oocytes contains numerous whorls of rough endoplasmic reticulum and Golgi bodies, suggesting that auto-synthetic vitellogenesis may occur in this species. In addition, the degeneration process of postvitellogenic oocytes triggered by a seasonal increase in water temperature (> 25°C) is described.
KW - Atresia
KW - Follicle cell
KW - Resorption
KW - Solitary oogenesis type
KW - Vitellogenesis
UR - http://www.scopus.com/inward/record.url?scp=84956643015&partnerID=8YFLogxK
U2 - 10.4002/040.059.0102
DO - 10.4002/040.059.0102
M3 - Artículo
AN - SCOPUS:84956643015
SN - 0076-2997
VL - 59
SP - 1
EP - 12
JO - Malacologia
JF - Malacologia
IS - 1
ER -