| Autor: |
J. Żuk, Z. Bolkhovskikh |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Acta Societatis Botanicorum Poloniae, Vol 40, Iss 3, Pp 513-518 (2015) |
| Druh dokumentu: |
article |
| ISSN: |
2083-9480 |
| DOI: |
10.5586/asbp.1971.038 |
| Popis: |
Observation of premeiotic nuclei of plants containing different numbers (from one to five) of Y chromosomes reveal that is such plants prior to meiosis all Y chromosomes are in fuzzy state, while in nuclei of tapetal cells or nuclei from anther stalk the number of big chromocentres is directly correlated with the number of Y chromosomes in given plants. This finding provides a further indication of genetic activity of Y chromosomes in this particular stage of the life cycle (premeiosis). Another indication of genetical activity of Y chromosomes was obtained from analysis of the rate of RNA synthesis in premeiosis. It was found that PMC's in the last premeioitc interphase exhibit a high rate of 3H-uridine incorporation. Thus in PMC's the fuzzy appearance of Y chromosomes coincides with intensive RNA synthesis. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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