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- Title
Altitudinal differences in cytogenetic traits of common dandelion during its invasion in high altitude areas.
- Authors
Reutova, Nina V.; Malaeva, Marianna B.; Dreeva, Fatima R.; Reutova, Tatiana V.; Dzhambetova, Petimat M.
- Abstract
This study aimed to investigation the effect of environmental changing associated with the elevation gradient on cytogenetic traits of Taraxacum officinale during its invasion in high altitude areas. We chose common dandelion as the object of research, because representatives of this species are able to inhabit a large range of elevations. The cytogenetic characteristics of the plants growing at altitudes of 200, 600, 1300, 2050, 2700 and 3050 m a.s.l in the Central Caucasus region have been studied. We determined the frequency of micronuclei, chromosomal aberrations, mitotic index and chromosome number in the cells of the apical root meristem using seed progeny of plants growing at different elevations. In the populations of natural habitats studied by us, all individuals were triploid with the exception of single ones. The level of ploidy increased in accordance with the altitude gradient when T. officinale invade in the disturbed highland areas. In the seed progeny of highland plants cell proliferation and the ratio of mitosis phases do not change along the elevation gradient. The frequency of chromosome aberrations increased by 1.3–4.6 times in the highland populations. The main types of mutations were fragments, lost and lagging chromosomes. The reasons for this are the influence of unfavorable conditions of high-altitude areas and high level of ploidy in plants of these populations. Despite the significant increase in the frequency of chromosome aberrations, no similar increase in the frequency of micronuclei resulting from these mutations was found.
- Subjects
CAUCASUS; COMMON dandelion; CHROMOSOME abnormalities; ALTITUDES; CHROMOSOMES; NUCLEOLUS
- Publication
Biologia, 2024, Vol 79, Issue 7, p1999
- ISSN
0006-3088
- Publication type
Article
- DOI
10.1007/s11756-024-01648-y