Root Architecture and Development of American Grape Rootstocks\rGrafted with Foxy Grapes (Vitis labrusca L.) Cultivars

One of the important factors affecting rootstock performance in grafted grapevine production is root structure and its ability for\rdifferent soil. In the present study, foxy grape varieties registered for the first time in the Black Sea Region in Turkey by the\rselection, and several American grape rootstocks were bench grafted. In this study; it is aimed to examine the root architecture of\rfoxy grape grafted saplings for their root architecture and the development of rootstocks. In the experiment ‘Rizessi’, ‘Çeliksu’,\r‘Ülkemiz’ and ‘Rizellim’ foxy grape cultivars grafted on 140Ru, SO4 and 110R rootstocks. WinRhizo root analysis program (Regent\rInstrument Inc. Canada, ver.2013) was used to determine rootstocks' architecture and development of grafted vine saplings. Roots\rprepared for scanning were placed on the scanning part of the device and transferred to the computer context. Root length and\rmean root diameter are two of the essential features that reveal the root architecture of rootstocks. In the study, root length (cm),\rroot surface area (cm2), root diameter (mm), root volume (cm3), root tip number (piece), root branching number (piece), and root\rintersection number (piece) were determined. Total root length was determined between 330.05 - 595.40 cm ('Rizellim'/SO4 and\r'Çeliksu'/140Ru) and mean root diameter of 2.04 - 3.13 mm ('Çeliksu'/140Ru and 'Rizessi'/110R). Negative relationships were found\rbetween root length and mean root diameter. Among the rootstocks, the highest root surface area was 399.67 cm2, root volume\rwas 29.32 m3, the number of root tips was 1605.75, the number of root forks was 5421.89, and the number of root crossing was\r671.61 on 110R rootstock. In all combinations obtained as a result of the study, it was determined that the rootstocks showed\rgood root development and were in harmony with the new foxy grape cultivars.