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Dev Growth Differ
1991 Aug 01;334:341-351. doi: 10.1111/j.1440-169X.1991.00341.x.
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Subcortical Rotation and Specification of the Dorsoventral Axis in Newt Eggs: (newt eggs/subcortical rotation/dorsoventral axis).
Fujisue M
,
Sakai M
,
Yamanat K
.
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The specification of the dorsoventral axis in naturally polyspermic eggs of the Japanese newt, Cynops pyrrhogaster, was first examined by studies on the spatial relationship between the dorsal midline of the future body plan and the sperm entrance points (SEPs1 ). On local insemination, the dorsal blastopore lip was usually found to be formed opposite the SEPs, as in anuran monospermic eggs. Next the movements of the subcortical layer and the cortex were analyzed. "Subcortical rotation" was observed, similar to that of Xenopus laevis eggs with respect to its timing and extent, and its direction was shown to predict the embryonic axis of the eggs. Thus, the dorsoventral axis was concluded to be determined by essentially the same mechanism in the newt as in Xenopus. Owing to their large size and long first cell cycle, newt eggs appear to be suitable material for study of subcortical rotation, but their behavior is unique in that subcortical rotation occurs in only the vegetal hemisphere so that the subcortical layer stretches in the future dorsal side. Studies on the movement of Nile blue spots suggested that the cytoplasm under the cortex in newt eggs consists of two layers.
Black,
Experimental control of the site of embryonic axis formation in Xenopus laevis eggs centrifuged before first cleavage.
1985, Pubmed,
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Black,
Experimental control of the site of embryonic axis formation in Xenopus laevis eggs centrifuged before first cleavage.
1985,
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,
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Black,
The first cleavage plane and the embryonic axis are determined by separate mechanisms in Xenopus laevis. II. Experimental dissociation by lateral compression of the egg.
1988,
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,
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Brachet,
An old enigma: the gray crescent of amphibian eggs.
1977,
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,
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Danilchik,
The first cleavage plane and the embryonic axis are determined by separate mechanisms in Xenopus laevis. I. Independence in undisturbed embryos.
1988,
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,
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Elinson,
Two UV-sensitive targets in dorsoanterior specification of frog embryos.
1989,
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,
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Elinson,
A transient array of parallel microtubules in frog eggs: potential tracks for a cytoplasmic rotation that specifies the dorso-ventral axis.
1988,
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,
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Gerhart,
Cortical rotation of the Xenopus egg: consequences for the anteroposterior pattern of embryonic dorsal development.
1989,
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,
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Nieuwkoop,
Origin and establishment of embryonic polar axes in amphibian development.
1977,
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Scharf,
Determination of the dorsal-ventral axis in eggs of Xenopus laevis: complete rescue of uv-impaired eggs by oblique orientation before first cleavage.
1980,
Pubmed
,
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Scharf,
Axis determination in eggs of Xenopus laevis: a critical period before first cleavage, identified by the common effects of cold, pressure and ultraviolet irradiation.
1983,
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,
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Scharf,
Hyperdorsoanterior embryos from Xenopus eggs treated with D2O.
1989,
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,
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Vincent,
Subcortical rotation in Xenopus eggs: an early step in embryonic axis specification.
1987,
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,
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Vincent,
Kinematics of gray crescent formation in Xenopus eggs: the displacement of subcortical cytoplasm relative to the egg surface.
1986,
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,
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