Influence of corbohydrate content on grafting in table grape varieties Gelu and Paula

Abstract

The factors that determine the formation of the callus at the grafting point, respectively the percentage of vines capable of being planted in the nursery, are of genetic, technological and ecological nature. Thus, the genetic nature of the two symbionts is crucial to the success of grafting. In the present work determinations were made regarding the behavior of table grape varieties Gelu and Paula grafted on three rootstocks RipariaGloire, Berlandieri x Riparia Selection Oppenheim 4-clone 4 Blaj and Berlandieri x Riparia Selection Crăciunel 2. It was found that the highest total content of carbohydrates had the rootstock RipariaGloire (13.49%), followed by Crăciunel 2 (12.78%) and SO4-4(12.02%). In the Vinifera varieties the same indicator was higher for Paula grape variety (14.32%) and for Gelu variety (13.07%). As a result of the grafting and forcing, the following aspects resulted: the percentage of vines suitable for planting was the highest in the Paula variety grafted on Crăciunel 2, respectively 99%, and in the Gelu variety grafted on Ripariagloire, of 98%. The vines for which the grafting point was complete, where the buds entered vegetation and the root primordia was in maximum percentage were found at the Paula / Crăciunel 2 variant, at 76%. Gelu / Crăciunel 2 variant resulted in obtaining the most vines (7%) that formed root primordia at the intermediate node as well.