RSAU-MTAA named after K. A. Timiryazev Rowan (Sorbus L. ) as urban greenspaces trees by: Oleg Netreba first year post-graduate student Faculty of Gardening and Landscape Architecture Department of Decorative Horticulture Scientific supervisers: ass. Prof. T. N. Fomina ass. Prof. V. A. Kruchkova Moscow. 2013
PURPOSE: to analyse polymorphism of Rowan (Sorbus L. ) for urban greenspaces trees breeding program PROBLEMS: q to study variability of Sorbus morphological and phenological traits; q to estimate Sorbus resistance to the major agroclimatic and anthropogenous stress factors q to evaluate use prospects of Rowan as urban greenspaces trees
OBJECT OF Sorbus hupehensis Sorboaronia Mich. RESEARCH Schneid. Sorbus aucuparia L. Sorbus thuringiaca L. Sorbocotoneaster pozdnjakovii L.
PLACE Moscow Botanical Garden of Academy of Sciences. - founded in April 1945; - the largest in Europe; - 43 species of Rowan.
URBAN GREENSPACES TREES Rowan (Sorbus L. ): - autumn leaf fall frost-resistant bushes and trees, growing in the northern and average part of the northern hemisphere; - exclusively decorative, widely used in garden design (white, cream or pink fragrant flowers, brilliant leathery bright green leaves in the summer, passing stages yellow and orange in autumn and in the winter decorated with smart clusters of the brilliant berries).
RESEARCH METHODS Morphological observation Phenological observations (Smirnov’s method) Sowing quality assessment Method of frost resistance assessment Method of gas resistance assessment Method of disease and pests resistance assessment
RESEARCH TECHNIQUE AND EQUIPMENT The electronic microscope The electronic measured fork for measuring the breadth of the trunk of a tree The microclonalny laboratory Resistograph - the device for measurement stem the decays
RESEARCH STAGES To identify the most important morphological and phenological selection criteria To study the most essential resistant features to major agroclimatic stress factors To study the most essential resistant features to anthropogenous stress factors To find out the most important species for an urban greenspaces trees breeding program
DIAGRAM OF THE MOST DECORATIVE SPECIES OF SORBUS L. 9 8. 1 8 7 6. 4 6 5 4. 3 3. 8 4 3. 2 3 2 1 0 Sorbus hupehensis C. K. Schneid. Sorboaronia Mich. Sorbus aucuparia L. Sorbocotoneaster pozdnjakovii L. Sorbus thuringiaca L.
DIAGRAM OF THE MOST TOLERANT SORBUS L. SPECIES TO ANTHROPOGENIC AND AGRO-CLIMATIC CONDITIONS 7 6 5 4 3 6. 2 5. 3 4. 3 2 3. 6 2. 7 1 0 Sorbus hupehensis C. K. Schneid. Sorboaronia Mich. Sorbocotoneaster pozdnjakovii L. Sorbus aucuparia L. Sorbus thuringiaca L.
RESULTS I. The main phenological and morphological criteria: • flowering time I. • coloring of flowers • coloring of fruits • autumn coloring of leaves II. three most decorative types of Sorbus L. 1. Sorbus hupehensis Schneid. 2. Sorboaronia Mich. 3. Sorbus aucuparia L. III.
II. Sorbus L. - tolerant to anthropogenous and agroclimatic conditions The agroclimatic criteria: -waterstress - urban gas & dust stress -different wind exposures stress The anthropogenous criteria: -soil surface structure change ; -biosphere structure change involving substances circulation and balance - power and thermal balance change three of the most stable Sorbus L. varieties 1. Sorbus hupehensis Schneid. 2. Sorboaronia Mich. 3. Sorbocotoneaster pozdnjakovii L.
III. Rowan selected for an urban greenspaces trees breeding program I. Sorbus hupehensis Schneid. II. Sorboaronia Mich. III. Sorbocotoneaster pozdnjakovii L. II. III.
Sorbus L. as urban plant trees and shrubs are appropriate and necessary for landscape architects for increasing quality of green spaces in cities as they are suited for growth on street verges, parks, and urban woodlands climate and soil types adaptation growth potential harsh climate and sulfur-polluted environments resistance decorative value ability to regenerate from seed and paved areas
CONCLUSIONS The selection technology of an urban greenspaces trees breeding program was introduced Morphological and phenological qualities of Rowan as an urban greenspaces trees were investigated Recommendations to urban planners and landscapers have been developed
PRACTICAL VALUE 1. Emphasis on selection in some important species traits will give, the possibilities of improving the quality of urban greenspaces trees 2. It will result in a higher resistant quality of greenspaces and less expenditure on their maintenance 3. It may thus lead to more and better greenspaces for the same money as spent today.
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