Click here to close
Hello! We notice that you are using Internet Explorer, which is not supported by Xenbase and may cause the site to display incorrectly.
We suggest using a current version of Chrome,
FireFox, or Safari.
Wilehm Roux Arch Dev Biol
1982 Jul 01;1914:241-245. doi: 10.1007/BF00848411.
Show Gene links
Show Anatomy links
The temporal and spatial relationships between cortical contraction, spermtrail formation, and pronuclear migration in fertilizedXenopus eggs.
Stewart-Savage J
,
Grey RD
.
???displayArticle.abstract???
The cortical contraction begins 4 min after insemination and one minute after prick activation. During the next 4 min, the pigment margin moves 15 degrees toward the animal pole. The cortex then relaxes to the prefertilization level over the next 10 min. Contrary to earlier estimations, the cortical contraction occurs during the same time span as the wave of cortical granule exocytosis. We suggest that the two events may result from a common stimulus. The spermtrail (ST) forms during the relaxation of the cortex. The ST first appears as a conically-shaped trail of pigment in the cytoplasm; it then elongates into a funnel-shaped trail as the male pronucleus migrates into the egg. The base of the cytoplasmic ST can be seen on the surface of the egg as a circular condensation of pigment. The male and female pronuclei migrate at a constant rate of 12 μm per minute. The male pronucleus migrates by the enlargement of its aster, whereas, it appears that the female pronucleus is dependent on the male aster for its motion.
Elinson,
Site of sperm entry and a cortical contraction associated with egg activation in the frog Rana pipiens.
1975, Pubmed
Elinson,
Site of sperm entry and a cortical contraction associated with egg activation in the frog Rana pipiens.
1975,
Pubmed
Franke,
Distribution and mode of arrangement of microfilamentous structures and actin in the cortex of the amphibian oocyte.
1976,
Pubmed
GURDON,
Factors responsible for the abnormal development of embryos obtained by nuclear transplantation in Xenopus laevis.
1960,
Pubmed
,
Xenbase
Gerhart,
A reinvestigation of the role of the grey crescent in axis formation in xenopus laevis.
1981,
Pubmed
,
Xenbase
Gilkey,
A free calcium wave traverses the activating egg of the medaka, Oryzias latipes.
1978,
Pubmed
Gingell,
Contractile responses at the surface of an amphibian egg.
1970,
Pubmed
Graham,
The regulation of DNA synthesis and mitosis in multinucleate frog eggs.
1966,
Pubmed
Grey,
Formation and structure of the fertilization envelope in Xenopus laevis.
1974,
Pubmed
,
Xenbase
Grey,
An electrical block is required to prevent polyspermy in eggs fertilized by natural mating of Xenopus laevis.
1982,
Pubmed
,
Xenbase
Hara,
Cinematographic observation of an "activation wave" (AW) on the locally inseminated egg ofXenopus laevis.
1979,
Pubmed
,
Xenbase
Harris,
A spiral cortical fiber system in fertilized sea urchin eggs.
1979,
Pubmed
Hollinger,
Calcium-induced dehiscence of cortical granules in Xenopus laevis oocytes.
1979,
Pubmed
,
Xenbase
Longo,
The fine structure of pronuclear development and fusion in the sea urchin, Arbacia punctulata.
1968,
Pubmed
Palecek,
Changes of the external and internal pigment pattern upon fertilization in the egg of Xenopus laevis.
1978,
Pubmed
,
Xenbase
Rzehak,
Changes in the pigment pattern of eggs of Xenopus laevis following fertilization.
1972,
Pubmed
,
Xenbase
Schatten,
Sperm incorporation, the pronuclear migrations, and their relation to the establishment of the first embryonic axis: time-lapse video microscopy of the movements during fertilization of the sea urchin Lytechinus variegatus.
1981,
Pubmed
Schroeder,
Ionophore A23187, calcium and contractility in frog eggs.
1974,
Pubmed
Steinhardt,
Intracellular calcium release at fertilization in the sea urchin egg.
1977,
Pubmed
Steinhardt,
Is calcium ionophore a universal activator for unfertilised eggs?
1974,
Pubmed
,
Xenbase
Wolf,
Isolation, physicochemical properties, and the macromolecular composition of the vitelline and fertilization envelopes from Xenopus laevis eggs.
1976,
Pubmed
,
Xenbase
Wolf,
Migration and division of cleavage nuclei in the gall midge,Wachtliella persicariae : II. Origin and ultrastructure of the migration cytaster.
1980,
Pubmed
