AGRICULTURAL BIOLOGY, 2015, V. 50, ¹ 5, pp. 673-684 ISSN 2412-0324 (English ed. Online) (SEL’SKOKHOZYAISTVENNAYA BIOLOGIYA) ISSN 0131-6397 (Russian ed. Print) ISSN 2313-4836 (Russian ed. Online) doi: 10.15389/agrobiology.2015.5.673rus doi: 10.15389/agrobiology.2015.5.673eng SELECTION OF SALT TOLERANT ALFALFA ( L.) PLANTS FROM DIFFERENT VARIETIES AND THEIR MORFO BIOLOGICAL AND SYMBIOTIC PROPERTIES ANALYSIS M.L. ROUMIANTSEVA1, G.V. STEPANOVA2, O.N. KURCHAK1, O.P. ONISHCHUK1, V.S. MUNTYAN1, E.A. DZYUBENKO3, N.I. DZYUBENKO3, B.V. SIMAROV1 Podbel’skogo, St. Petersburg, 196608 Russia, e-mail mroumiantseva@yandex.ru; uchnii Gorodok, Lobnya, Moscow Province, 141055 Russia, e-mail gvstep@yandex.ru; Federal Agency of Scientific Organizations, 3, sh. <...> Bol’shaya Morskaya, St. Petersburg, 190000 Russia, e-mail elena.dzyubenko@gmail.com Acknowledgements: Supported by Russian Foundation for Basic Research 15-04-09295а and 14-04-01441а, State Contract ¹ 16.М04.11.0013 A b s t r a c t Soils degradation growing in our days is associated with the depletion of their fertility, a result of crop rotation with excessive amounts of mineral fertilizers and chemical plant protection products, as well as it links with widespread worsening climatic conditions and environmental conditions. <...> For this reason, agriculture based on environmentally friendly technologies must be an absolute priority. <...> Legumes can fix atmospheric nitrogen in symbiosis with nodule bacteria and accumulate it in plant biomass. <...> Pastures based on legumes contribute to the restoration of soils destroyed and excluded from crop rotation, such as desert or saline. <...> In this, the development of pathways to create new productive plant-microbe systems that can grow in adverse conditions, is of great theoretical and practical significance. <...> The objectives of the study was to identify salt-tolerant plants of alfalfa ( L.), to obtain plants of the I1 generation by self-pollination approach and to analyse their morphobiological and symbiotic properties in model experiments. <...> The study was performed on 13 tetraploid and diploid varieties of alfalfa, including commercially valuable varieties Soleustoychivaya and Agniya, both of which were tested without rhizobia inoculation and in symbioses with symbiotic activity of alfalfa varieties showed that they were highly responsible to strains. <...> Rm2011 strain inoculation and formed an effective symbiosis under saline conditions <...>