Distinctive features of Ex situ plant populations

M. Gaponenko, A. Gnatiuk, D. Rakhmetov
M. M. Gryshko National Botanical Garden of NAS of Ukraine, Kyiv; M. M. Gryshko National Botanical Garden of NAS of Ukraine, Kyiv; M. M. Gryshko National Botanical Garden of NAS of Ukraine, Kyiv

Abstract


Distinctive features of ex situ plant populations (outside natural habitats) are manifested during the formation and development of groups of
individuals mainly in the process of their introduction and acclimatization. The experience and practice of using terms for ex situ plant populations has been analyzed. Information about artificially created plant groups is generalized. The results of the analysis concerning the definition of the term "ex situ plant population" and its use in relation to introduced plants are presented. The list of definitions for the following terms are given: "initial population", "introductive population", "introductive coenotic population", "introduced population",
"cultivated populations", "agro population", "cultural population", "hybrid population", "artificial population", "experimental population", "spontaneous population". It has been stated that modeling, forming and copying methods are used to form ex situ plant populations. It has been noted that ex situ plant populations can be formed and developed independently or artificially formed. The scheme of distribution of ex situ plant populations by the degree of genetic integrity, ability to reproduce, duration of existence, size and stage of development, place and style of formation of the initial population is proposed. It has been established that groups of genetically homogeneous individuals of artificial plant groups that freely cross each other and for a long time reproduce offsprings can be characterized as populations. Such populations are the result of purposeful human activity on the introduction and cultivation of plants, and are largely dependent on anthropic influence. The study of their structure and dynamics is a prerequisite for predicting and evaluating the success of introductions and preventing threats of spontaneous propagation and uncontrolled, unwanted naturalization of plants under new growth conditions.

Keywords


introduction, plant population ex situ, introductory population, distinctive features, cultivar phytocenosis

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Received: 10.04.2020

Revised: 11.05.2020

Signed for press: 11.05.2020




DOI: http://dx.doi.org/10.17721/1728_2748.2020.81.6-10

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