Cyclic Polyploidy in Obligate Agamic Amoebae
- Авторы: Demin S.1, Berdieva M.1, Goodkov A.1
-
Учреждения:
- Institute of Cytology of the Russian Academy of Sciences
- Выпуск: Том 13, № 3 (2019)
- Страницы: 242-246
- Раздел: Article
- URL: https://journals.rcsi.science/1990-519X/article/view/212957
- DOI: https://doi.org/10.1134/S1990519X19030027
- ID: 212957
Цитировать
Аннотация
It is considered that asexual reproduction of organisms should lead to accumulation of harmful mutations in a series of successive generations (the so-called “Muller’s ratchet”). Accordingly, effective mechanisms for “nulling” this effect should exist in the life cycle of obligate agamic protists. According to one hypothesis, a so-called “cyclic polyploidy” (or agamic ploidy cycle) can act as such a mechanism. Lobose amoebae Amoeba proteus and closely related species are obligate agamic organisms. The karyological analysis that we conducted, as well as a detailed study of the cell cycle of A. proteus and A. borokensis using optical tomography, allow us to conclude that these organisms have a special kind of cyclic polyploidy. The euploid state of the nucleus takes a completely insignificant period of time relative to the duration of the entire nuclear cycle of these amoebae, the stages of meta- and telophase of mitosis, whereas the rest time of the cycle is associated with the aneuploid state of the nucleus.
Ключевые слова
Об авторах
S. Demin
Institute of Cytology of the Russian Academy of Sciences
Email: pelgood1@gmail.com
Россия, St. Petersburg, 194064
M. Berdieva
Institute of Cytology of the Russian Academy of Sciences
Email: pelgood1@gmail.com
Россия, St. Petersburg, 194064
A. Goodkov
Institute of Cytology of the Russian Academy of Sciences
Автор, ответственный за переписку.
Email: pelgood1@gmail.com
Россия, St. Petersburg, 194064