THE BEHAVIOR OF THE ‘MAMAIA’ GRAPEVINE CULTIVAR GRAFTED ON THE ‘SO4’, ‘KOBER 5BB’ AND ‘FERCAL’ ROOTSTOCKS IN THE PROCESS OF FORCING THE GRAFTED VINES

Abstract

The paper presents the callusing behavior of the ‘Mamaia’ grape cultivar grafted on ‘SO4’, ‘Kober 5BB’ and ‘Fercal’ rootstocks during the forcing process at the Murfatlar Viticulture and Winemaking Research and Development Station. The callus yield of the vines
was monitored for each cultivar-rootstock combination following the use of two stratification methods in sawdust and in water. Three rootstock cultivars were tested, taking into account that the soils in the Murfatlar vineyard require special attention to tolerance to active limestone, a characteristic to which the three rootstocks behave differently. Unifactorial and bifactorial analysis of variance, as well as the Tukey HSD test, showed that ‘SO4’ and ‘Kober 5BB’ rootstocks produced significantly higher and statistically equivalent callus yields compared to ‘Fercal’, regardless of the stratification method used, which had no significant effect on yield. The aim is to identify the optimal cultivar-rootstock combination for the production of certified, high-quality planting material from the ‘Mamaia’ cultivar.