The concentrations of steviol and its derivatives stimulating the growth of wheat plants were measured: 10-8 for stevioside and 10-9 М for steviol and isosteviol. It was found that stevioside increased the activity of amylolytic enzymes and protein content, as well as frost tolerance of the roots of wheat seedlings. Thus, stevioside can be recommended for the development of complex phytopreparations for stimulating the growth processes and increasing the resistance of wheat plants to low temperatures.
Keywords: frost tolerance; isosteviol; plant growth regulators; steviol; steviol-glycoside; stevioside.