[The organization of the cortical layer of amphibian ova. 1. The ultrastructure of the cortex of the oocytes and ova of the clawed toad: the effect of divalent cations].
Ultrastructure of oocyte and egg cortical layer isolated in media containing various ions has been studied. The following results were obtained: 1) in cortical layer a two-component cytoskeletal system is present; morphology of this system changes during development; 2) cytoskeleton of the egg cortex acts as a two-component system in response to the influence of Ca2+: the cortex per se is destroyed while subcortex is contracted; 3) cytoskeleton of the oocyte cortex is destroyed under the influence of Ca2+; 4) nature and sensitivity to the absence of Mg2+ in the medium varies for cytoskeletal structures of oocyte and egg cortex.
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Riabova
D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D002413:Cations, Divalent; D002478:Cells, Cultured / Q000187:drug effects / Q000648:ultrastructure; D003470:Culture Media; D003599:Cytoskeleton / Q000187:drug effects / Q000648:ultrastructure; D005260:Female; D008274:Magnesium / Q000494:pharmacology*; D009865:Oocytes / Q000187:drug effects / Q000648:ultrastructure*; D010063:Ovum / Q000187:drug effects / Q000648:ultrastructure*; D014982:Xenopus laevis
D002413:Cations, Divalent; D003470:Culture Media; D008274:Magnesium; D002118:Calcium
Organizatsiia kortikal'nogo sloia iaits amfibiĭ. 1. Ul'trastruktura korteksa ootsitov i iaits shportsevoĭ liagushki: vliianie dvukhvalentnykh kationov.