Cyclic Polyploidy in Obligate Agamic Amoebae
- Авторлар: Demin S.1, Berdieva M.1, Goodkov A.1
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Мекемелер:
- Institute of Cytology of the Russian Academy of Sciences
- Шығарылым: Том 13, № 3 (2019)
- Беттер: 242-246
- Бөлім: Article
- URL: https://journals.rcsi.science/1990-519X/article/view/212957
- DOI: https://doi.org/10.1134/S1990519X19030027
- ID: 212957
Дәйексөз келтіру
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.
Негізгі сөздер
Авторлар туралы
S. Demin
Institute of Cytology of the Russian Academy of Sciences
Email: pelgood1@gmail.com
Ресей, St. Petersburg, 194064
M. Berdieva
Institute of Cytology of the Russian Academy of Sciences
Email: pelgood1@gmail.com
Ресей, St. Petersburg, 194064
A. Goodkov
Institute of Cytology of the Russian Academy of Sciences
Хат алмасуға жауапты Автор.
Email: pelgood1@gmail.com
Ресей, St. Petersburg, 194064