TY - JOUR
T1 - Ultraestructura del ovocito maduro y en reabsorción de spondylus limbatus G. B. Sowerby II, 1847 (= S. Calcifer) (bivalvia: spondylidae)
AU - Camacho-Mondragón, Marian Alejandra
AU - Villalejo-Fuerte, Marcial
AU - Ceballos-Vázquez, Bertha Patricia
AU - López-Villegas, Edgar Oliver
AU - Uría-Galicia, Esther
AU - Vélez-Arellano, Nurenskaya
AU - Arellano-Martínez, Marcial
N1 - Publisher Copyright:
© 2019, Universidad de la Frontera. All rights reserved.
PY - 2019/6
Y1 - 2019/6
N2 - Spondylus limbatus is a species under special protection in Mexico, of which there is little or no information in the literature of biological, histological or ultrastructural studies of the ovary. The objective of this research was to characterize the ultrastructural morphology of mature and degenerating female gametes. The female gonad of S. limbatus in mature state presented post-vitellogenic oocytes 60-70 µm in diameter, which have characteristics of metabolically active and highly synthesizing cells. The cytoplasmic membrane has specializations designed to increase the absorption surface of the cell, the microvilli; the cytoplasm presents numerous membranous systems related to synthesis of reserve and secretion material as well as the highly lobed nuclear organization pattern; a large surface that ensures core-cytoplasm exchange, is structurally incorporated into the vitellogenesis process. Finally, ultrastructural changes resulting from the lysis of the oocytes are described: collapse of nuclear and cytoplasmic membranes, and the presence of macrophage hemocytic cells.
AB - Spondylus limbatus is a species under special protection in Mexico, of which there is little or no information in the literature of biological, histological or ultrastructural studies of the ovary. The objective of this research was to characterize the ultrastructural morphology of mature and degenerating female gametes. The female gonad of S. limbatus in mature state presented post-vitellogenic oocytes 60-70 µm in diameter, which have characteristics of metabolically active and highly synthesizing cells. The cytoplasmic membrane has specializations designed to increase the absorption surface of the cell, the microvilli; the cytoplasm presents numerous membranous systems related to synthesis of reserve and secretion material as well as the highly lobed nuclear organization pattern; a large surface that ensures core-cytoplasm exchange, is structurally incorporated into the vitellogenesis process. Finally, ultrastructural changes resulting from the lysis of the oocytes are described: collapse of nuclear and cytoplasmic membranes, and the presence of macrophage hemocytic cells.
KW - Electron microscopy
KW - Gonad
KW - Reproduction
KW - Vitelo
UR - http://www.scopus.com/inward/record.url?scp=85066811024&partnerID=8YFLogxK
U2 - 10.4067/S0717-95022019000200694
DO - 10.4067/S0717-95022019000200694
M3 - Artículo
SN - 0717-9367
VL - 37
SP - 694
EP - 700
JO - International Journal of Morphology
JF - International Journal of Morphology
IS - 2
ER -