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- W1496537348 abstract "In the physiologically polyspermic eggs of the newt, Cynops pyrrhogaster, a number of accessory sperm undergo pronuclear formation along with a concomitant DNA synthesis, but degenerate after zygote nucleus formation. When denuded eggs were divided into two halves at various post-fertilization stages, the andromerogons produced before zygote nucleus formation but not after that stage cleaved at a high frequency. The accessory sperm were unable to participate in the cleavage when they were located in the half of the egg which was connected with the diploid merogon by a cytoplasmic bridge higher than 100 μm in height. The removal of the egg nucleus or the retardation of early post-fertilization nuclear events by treatment with cycloheximide resulted in the induction of multipolar cleavage. Continuous exposure of the fertilized eggs to aphidicolin showed that in the appreciable absence of the DNA synthesis many eggs underwent a first cleavage cytokinesis of a mostly abortive type, but failed to initiate the following cytokinesis at all. Cytological examinations in association with these experiments suggest that the observed suppression of accessory sperm includes the inhibition of centriolar replication under the influence of the zygote nucleus, resulting in the failure of cytasters corporating with nuclear-independent activity of cortical cytoplasm." @default.
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- W1496537348 date "1985-06-01" @default.
- W1496537348 modified "2023-10-16" @default.
- W1496537348 title "Experiments Pertaining to the Suppression of Accessory Sperm in Fertilized Newt Eggs*. (polyspermy/cleavage/sperm nucleus/newt egg)" @default.
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- W1496537348 doi "https://doi.org/10.1111/j.1440-169x.1985.00323.x" @default.
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