Abstract
The article aimed at assessing introduction prospect for 32 species of the genera Acer L., Betula L., Fraxinus L., Padus Mill., Syringa L. and Sorbus L. at the Botanical Gardens of Petrozavodsk State University (Southern Karelia, central taiga subzone). The degree of introduction prospect was assessed with the use of the integral assessment method by P. I. Lapin and S. V. Sidneva. Such indicators as annual maturing of shoots, regular growth of axial shoots, winter hardiness of plants, habit preservation, shoot-forming capability, generative reproduction capability, capability to reproduce in plantation were taken into account. It was found that Acer ginnala, Acer platanoides, Betula platyphylla, Betula ulmifolia, Fraxinus excelsior, Padus virginiana, Padus pensylvanica, Padus maackii, Syringa vulgaris, Syringa pubescens, Syringa emodi, Syringa × henryi, Syringa josikaea, Syringa villosa, Syringa vulgaris var. Congo, Sorbus decora, Sorbus virginianis and Sorbus аmericana have the highest prospect rates (80–100 points), the other studied species – fairly high prospect rates (56–79 points). All the studied introduced species of deciduous trees can be successfully used in Karelia for gardening and landscaping purposes. Acer platanoides, Betula platyphylla, Fraxinus excelsior, Padus pensylvanica, Padus maackii, Syringa vulgaris и Sorbus decora show the highest degree of introduction prospect (about100 points).
Highlights
Most indigenous species of woody plants in the taiga zone of Russia are known to be extremely sensitive to progressive environmental pollution
Annual maturing of shoots is one of the most important indicators of successful introduction characterizing successful wintering
The studies demonstrated that the majority of the studied species have maximum annual maturing of shoots or close to it, only Padus virginiana, Sorbus hybrida, Syringa vulgaris var
Summary
Most indigenous species of woody plants in the taiga zone of Russia are known to be extremely sensitive to progressive environmental pollution. According to many scientists (Bazilevskaya 1964; Bradshaw 1995; Mamaev and Makhiev 1996; Isaev et al 1997; Budantsev et al.2004; Houtman 2004.), biological diversity of natural and artificial phytocenoses may be increased only due to woody plants introduction. All this suggests that deciduous woody plants introduction and its prospects assessment are required. The latter can be determined only on the basis of comprehensive study of the test plants adaptation in new conditions
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