The objetive of this research was to evaluate the feasibility to produce nursery trees of ‘Rubi’ grapevine through green grafting on herbaceous cutting of two vine rootstocks (‘Campinas’ - IAC 766 and ‘Jales’ - IAC 572). Rootstocks cuttings were taken from a virus-free stock plant, and consisted of the leaves elimination of the basal portion, leaving just one leaf in the superior part of each one. Cuttings were prepared with a cut below the node in the basal portion and a cut in the internode in the superior portion, leaving each one with 20cm of length and 0.5cm of diameter. Cuttings were then placed in plastic boxes containing hull rice coal growth medium on mist chamber. After four weeks, the rooted rootstocks were transferred into plastic bags containing soil mix. The ‘Rubi’ green grafting was performed in three different periods after the rootstocks transplantation (30, 60 and 90 days). A randomized design was used as statistical model with 6 treatments and 5 replications. Each plot was composed by 10 trees. The treatments were compared 80 days after each grafting period through the following parameters: porcentage of shooting grafts, length and diameter of shooting grafts, fresh and dry weigth of roots and root quantification (root area and total root length) through image analysis using SIARCS® software. It was possible to conclude that: a) the production advance of ‘Rubi’ young trees is possible performing the green grafting on ‘Campinas’ and ‘Jales’ rootstocks 90 days after their rooting, b) the green grafting technique reduces the time necessary to produce ‘Rubi’ young trees by 5-6 months on greenhouse condition and c) nursery trees of ‘Rubi’ grapevine produced through green grafting on herbaceous cuttings of ‘Campinas’ and ‘Jales’ rootstocks do not show differences in relation to the shooting grafts and the root system characteristics.
Vitis spp; propagation; rooting
