GROWTH BEHAVIOUR OF THE FLORINA CULTIVAR GRAFTED ON THE M9 ROOTSTOCK WITH DIFFERENT ORIGIN

Manol Dallev, Galya Dobrevska, Rada Popova

Abstract: The experiment was conducted from 2011 to 2014 in the experimental field of the Fruit growing department at the Agricultural University – Plovdiv, located near the village of Brestnik. The growth behaviour of the Florina cultivar grafted on the M9 rootstock was studied. The M9 rootstock had been produced in a stoolbed from plants with three different origins: from adventive buds at the roots; by clonal micropropagation technology and by somatic organogenesis from leaf explants. The highest thickening speed of the rootstocks in nursery, measured by the end of June, is observed in respect to the plants derived through somatic organogenesis. This also suggests earlier cambial activity. The vegetative growth of the cultivar slows down at the end of the first half of July. The highest total vegetative growth of the cultivar is achieved by the plant derived of the rootstock through somatic organogenesis from leaf explants.

Keywords: apple rootstocks; nursery; somatic organogenesis

Date published: 2018-03-07