Karyological and Cytogenetical Studies of Coniferous Plants under Introduction Conditions

Forestry, forestry, forest crops, agroforestry, landscaping, forest pyrology and taxation (agricultural sciences) (сельскохозяйственные науки)

UDC 576.312.35/37:582.42

DOI: 10.34736/FNC.2023. 

Tamara S. Sedel’nikova, Tamara S. Sedel’nikova, Dr. Sci. (Biol.), tss@ksc.krasn.ru, orcid: 0000-0002-6689-2369
Elena N. Muratova, Dr. Sci. (Biol.), elena-muratova@ksc.krasn.ru, orcid: 0000-0002-5951-4968
Aleksander V. Pimenov,Dr. Sci. (Biol.), orcid: 0000-0002-6572-1402

V. N. Sukachev Institute of Forest, Russian Academy of Sciences, Siberian Branch, Federal Research Center «Krasnoyarsk Science Center SB RAS», E-mail: institute_forest@ksc.krasn.ru, 660036, Akademgorodok 50/28, Krasnoyarsk, Russia 

Abstract.Parks, Arboretums and public gardens, which contain local and introduced species of coniferous plants, are essential elements of a comfortable urban environment. To develop the scientific basis for the introduction of conifers, it is necessary to study mechanisms of their adaptation to new growing conditions using cytogenetic methods for monitoring the condition of plantings. The purpose of the work is to summarize the data obtained by the authors from a karyological and cytogenetic study of conifers from the pine (Pinaceae) and cypress (Cupressaceae) families under introduction conditions. Research was carried out in arboretums and parklands in Russia and other countries. Using karyological and cytogenetic methods, the number of chromosomes, their morphological parameters, occurrence and types of chromosomal rearrangements were analyzed, and mitosis and meiosis were studied. In all studied conifer species, including decorative forms and cultivars, various cytogenetic changes were revealed under introduction conditions: variability in the number of chromosomes (mixoploidy), the appearance of additional or B chromosomes, morphological disturbances and an increase in the number of nucleolar loci in chromosomes, the emergence of chromosomal rearrangements, anomalies of mitosis and meiosis. These changes may indicate ongoing processes of adaptation of conifers under conditions of introduction.
Keywords.conifers, chromosomes, mitosis, meiosis, introduction
Funding.This study was carried out as the part of the State Assignment, no. FWES-2021-0009 «Functional dynamic indication of Siberian forests biodiversity».
Citation.. Sedel’nikova T.S., Muratova E.N., Pimenov A.V. Karyological and Cytogenetical Studies of Coniferous Plants under Introduction Conditions.  Scientific Agronomy Journal. 2023;4(123):46-51. DOI: 10.34736/FNC.2023.
Поступила в редакцию: 20.10.2023
Accepted for printing: 07.12.2023