HANGES IN A NUMBER OF CHARACTERISTICS OF COMMON DANDELION (TARAXACUM OFFICINALE WIGG) DURING INVASION INTO ANTROPOGENICALLY DISTURBED AREAS OF THE HIGHLANDS
N. Reutova, M. Mallaeva, F. Dreeva, T. Reutova, P. Dzhambetova
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引用次数: 0
Abstract
Chromosome count, plant height, number of inflorescences per plant, number of seeds per inflorescence, seed weight, germination and germination energy of plant seeds growing at altitudes of 200, 600, 1300, 2050, 2700 and 3050 m above sea level (Central Caucasus) were studied. The studies were conducted in 2013, 2014 and 2018 at the same sampling points. Chromosome counts were determined by cytogenetic method. In the T. officinale species, high ploid individuals predominate in populations when invading anthropogenically disturbed territories of the highlands. Polyploid plants are larger in size compared to their low ploid predecessors, but in high-altitude, selection is aimed at preserving smaller phenotypes. The increase in seed mass characteristic of polyploid plants was supported by natural selection and in conditions of highlands. Germination and germination energy did not change with the increase of altitude.
期刊介绍：
Russian Journal of Biological Invasions publishes original scientific papers dealing with biological invasions of alien species in both terrestrial and aquatic ecosystems and covers the following subjects:description of invasion process (theory, modeling, results of observations and experiments): invasion corridors, invasion vectors, invader species adaptations, vulnerability of aboriginal ecosystems;monitoring of invasion process (reports about findings of organisms out of the limits of natural range, propagule pressure assessment, settling dynamics, rates of naturalization);invasion risk assessment; genetic, evolutional, and ecological consequences of biological invasions of alien species; methods, means of hoarding, processing and presentation of applied research data (new developments, modeling, research results, databases) with factual and geoinformation system applications;use of the results of biological invasion research (methods and new basic results) under the study of marine, fresh-water and terrestrial species, populations, communities and ecosystems; control, rational use and eradication of the harmful alien species..
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