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. 2021 Sep 28;15(4):329-338.
doi: 10.3897/CompCytogen.v15.i4.64350. eCollection 2021.

Study of chromatin diminution in Cyclopskolensis (Copepoda, Crustacea) by radiobiological methods

Andrey Grishanin  1   2 , Oksana Chinyakova  2
Affiliations

Study of chromatin diminution in Cyclopskolensis (Copepoda, Crustacea) by radiobiological methods

Andrey Grishanin et al. Comp Cytogenet. .

Abstract

The experimental results show that at doses of 20 Gy and 100 Gy, the development of Cyclopskolensis Lilljeborg, 1901 (Copepoda, Cyclopoida) embryos ceases at the 16-cell stage, without affecting the course of chromatin diminution. A dose of 200 Gy terminated the process of chromatin diminution in some of the embryos. These results support the hypothesis that cytoplasmic factors in the egg play an important role in the process of chromatin diminution.

Keywords: Copepoda; embryogenesis; radiation.

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Figures

Figure 1.
Figure 1.
Anaphase of 3rd cleavage division of C.kolensis embryo at 5 Gy (dose of ionizing radiation). Designations: Chr- chromosome, Br- bridge, Fr- fragment.
Figure 2.
Figure 2.
Metaphase of a C.kolensis embryo cell after irradiation at a dose of 100 Gy. Chr- chromosome, Fr- fragment.
Figure 3.
Figure 3.
Anaphase of 3-d cleavage division of C.kolensis embryo in the control experiment. Chr- chromosome.
Figure 4.
Figure 4.
The percentage of Cyclopskolensis embryos that reached a particular cell stage of embryonic development in embryos exposed to different levels of radiation for 24 hours.
See this image and copyright information in PMC

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