Increasing the Biodiversity of the Dendroflora of Sparsely Wooded Regions by Adapted Representatives of the Genus Robinia L.

Purpose of the study: to substantiate prospects using various species, varieties and forms genus Robinia in protective afforestation landscaping settlements dry-steppe semi-desert zones southern Russia. It is established that main limiting factors affecting growth, development condition representatives Volgograd region are winter temperatures up −37 °C, as well poor moisture availability uneven distribution precipitation during growing season combination with extremely low autumn–winter period. All generic complex belong group plants start late finish vegetative period late. Phenological atypicity lower half normal range, indicators from +1 °C 0, which indicates a high level adaptation climatic conditions region. In process long-term acclimatization, many introduced species have developed number genotypic adaptations currently able tolerate extreme °C. An assessment potential drought resistance based on water-retaining ability leaves showed higher rates water-resistance capacity (76.8% water loss) typical R. neomexicana, has natural area western arid part North American continent. viscosa var. hartwegii, areas monsoon subtropical climate eastern America, distinguished by (94.1% loss), clonal decorative pseudoacacia: f. pyramidalis umbraculifera (97.6–95.8% common only culture characterized whole bioecological stability. The data obtained us allow recommend following assortment for territories Russia: pseudoacacia, neomexicana rusbyi pseudoacacia x neomexicana.