INFLUENCE OF ROOTSTOCK ON THE ACCUMULATION OF ANTHOCYANINS IN THE BARK OF ANNUAL SHOOTS OF GRAFTED VARIETIES
Rootstock forms of apple trees obtained as a result of selection in the Michurinsk State Agrarian University and at the Buinak experimental station differ in the presence of anthocyanin pigment in the vegetative organs. During the observation period, there is a tendency to increase the content of anthocyanins in the bark of grafted varieties when grafting them on rootstocks with a high content of pigment. This indirect indicator can be used to diagnose the grafted variety's resistance to winter conditions.