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The Embryos Obtained from the Karyoplasts of Starfish Oocytes: Their Development and Sensitivity to Cytostatic Neurotransmitter Antagonists
Author(s) -
BUZNIKOV GENNADY A.,
MALCHENKO LYUDMILA A.,
DELONE GALINA V.,
BRODSKY VSEVOLOD Ya.
Publication year - 1987
Publication title -
development, growth and differentiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 66
eISSN - 1440-169X
pISSN - 0012-1592
DOI - 10.1111/j.1440-169x.1987.00205.x
Subject(s) - starfish , biology , microbiology and biotechnology , embryo , cleavage (geology) , oocyte , neurotransmitter , cytoplasm , andrology , endocrinology , medicine , central nervous system , ecology , paleontology , fracture (geology)
Karyoplasts obtained from full‐grown oocytes of the starfish Aphelasterias japonica have practically no cytoplams and are incapable of maturation. Karyoplasts of oocytes of starfishes Marthasterias glacialis and Acanthaster planci have the cytoplasm (10%–15% of the total karyoplast volume) and are often capable of maturation, fertilization and one or several cleavage divisions. The embryoskaryoplasts completely lose supersensitivity and retain usual sensitivity to cytostatic antagonists of neurotransmitters. The assumption is made that the incapability or limited capability of this embryos for development might be due to a deficiency of certain components of the “prenervous” neurotransmitter systems.