Dependence of the Duration of Periods of the Mitotic Cycle on the Holoploid DNA Content in Root Apical Meristems

The dependence of the duration of individual periods of the mitotic cycle on the holoploid DNA content, the number of chromosomes, and the average amount of DNA per chromosome for 64 species was analyzed. In diploids, the duration of the mitotic cycle and its T S and T G1 periods increased with an i...

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Bibliographic Details
Published in:Russian journal of developmental biology 2022-10, Vol.53 (5), p.363-372
Main Authors: Zhukovskaya, N. V., Ivanov, V. B.
Format: Article
Language:English
Subjects:
Animal Anatomy
apical meristems
Asparagales
Biomedical and Life Sciences
Chromosomes
Deoxyribonucleic acid
Developmental Biology
Diploids
diploidy
DNA
haploidy
Histology
Life Sciences
Liliales
Meristems
Mitosis
Morphology
Original Research
Polyploidy
Yeast
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Summary:The dependence of the duration of individual periods of the mitotic cycle on the holoploid DNA content, the number of chromosomes, and the average amount of DNA per chromosome for 64 species was analyzed. In diploids, the duration of the mitotic cycle and its T S and T G1 periods increased with an increase in the haploid DNA content, and a weak increase in the duration of mitosis and the T G2 period was insignificant. The duration of the sum of the durations of periods T G1 , T G2 , and mitosis T M increased with an increase in the holoploid DNA content but not as sharply as the entire cycle. In representatives of the orders Asparalales and Liliales, which differ from other species by a much larger holoploid DNA content and mitotic cycle durations, these correlations were more pronounced and this was observed for the duration of mitosis and the T G2 period in them. In polyploid species not belonging to the orders Asparalales and Liliales, only the duration of mitosis T M weakly depended on the holoploid DNA content, while no dependence was observed on the duration of the whole cycle and its periods. No data are available for the polyploid species from Asparagales and Liliales.
ISSN:1062-3604
1608-3326
DOI:10.1134/S1062360422050071