Аннотация
It was presents the results of the comparative analysis on morphological properties of strain S. canosus 71 and its new variants, obtained after - and combined (- and UV–rays) irradiation was conducted. The new selected variants ability for heteroauxin synthesis was determined. The streptomycetes culture liquid, contained this phytohormone, exerted positive action on the growth and rizogenesis of agricul- tural plants and promoted the stimulation of water-soluble proteins accumulation in plants.