Rhizogenesis of narrow-leaved blueberry (Vaccinium angustifolium Ait.) in vitro depending on the concentration of auxins

The results of studies on the cultivation of half-highbush blueberry (Northblue and Putte cultivars) and hybrid forms of narrow-leavedblueberry (Vaccinium angustifolium Ait.) in vitro at the stage of rooting of microshoots on WPM nutrient medium. IBA and IAAare used as growth regulating substances at concentrations of 1.0 and 2.0 mg/l. The number and total length of the roots of blueberry regenerated plants increased by 1.2-2.4 and 1.8-8.1 times, respectively, with an increase in the concentration of IBA and IAA in the nutrient medium from 1.0 to 2.0 mg/l. The total length of roots per plant of blueberry has maximum values (12.2 cm on average) in the presence of IAAauxin in the nutrient medium at a concentration of 2.0 mg/l, while in plants of hybrid forms 23-1-11 and 27-10 the number and the total length of roots per plant are 1.2-1.3 and 1.4-1.6 times greater, respectively, than in the Northblue and Putte cultivars.