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    Effect of grafting on iron uptake of farold 40, ohf 333 and ohf 87 pear rootstocks from the soil
    (Bellwether Publishing, Ltd., 2020) Uçgun, Kadir; Butar, S.; Çetinbaş, M.; Altındal, M.; Cansu, M.
    The response of cultivars to iron (Fe) deficiency and the effects of cultivars on Fe-nutrition of rootstocks was investigated through Active-Fe content of the leaf. Leaf samples were taken from the mid-sections of the nursery trees and they were subjected to Active-Fe and Total–Fe analyses. There were significant differences in Fe-nutrition of ungrafted rootstocks, but differences were not observed when the rootstocks were grafted pear cultivars cv. ‘Deveci’ and ‘Santa Maria.’ On the other hand, significant differences were observed between the cultivars when they were grafted on different rootstocks. The effect of cultivar on Fe-nutrition of the rootstock was also found to be significant. According to the ungrafted rootstock, cultivars except ‘Deveci’ grafted on Old Home x Farmingdale (OHxF) 333 (OHF 333) decreased the Fe-nutrition of the rootstock. The combination of OHF 333 x ‘Deveci’ was quite different and it significantly improved the Fe-uptake of the rootstock. It should be taken into consideration cultivar-induced and/or rootstock x cultivar combinations-induced differences under chlorosis-induced conditions at the new pear orchard establishment. © 2020 Taylor & Francis Group, LLC.
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    The graft unions of almond, plum and apricot varieties grafted on rootpac rootstocks
    (Centenary University, 2018) Çetinbaş, M.; Butar, S.; Koçal, H.; Sesli, Yılmaz; Sarısu, H.C.; Seferoğlu, H.G.
    The aim of this study was to obtain a basic information about the graft union formation in relation with growth characteristics between ‘Rootpac’ rootstocks and almond, plum and apricot varieties. In this trial, ‘Rootpac-R’, ‘Rootpac-90’, ‘Rootpac-70’, ‘Rootpac-40’, ‘Rootpac-20’ rootstocks and ‘Nonpareil’, ‘Ferragnes’ almond, ‘Aprikoz’, ‘Hacıhaliloğlu’ apricot and ‘Black Diamond’, ‘Papaz’ plum cultivars were used as plant materials. 1, 4 and 12 months after T budding, graft samples were evaluated microscopically and macroscopically. Transverse sections (20-45 µ) were cut by rotary microtome. At transverse sections that taken from 4 and 12 months after grafting were observed forming of callus in all combinations from scion and rootstocks, being broken of necrotic layer as different densities and occurring of cambial differentiations and cambial continuity between scion and rootstock were established. However, tissue development differences were observed in the combinations of ‘Aprikoz’ and ‘Hacıhaliloğlu’ apricots grafted on ‘Rootpac-R’, ‘Black Diamond’ plum grafted on ‘Rootpac-40’, and ‘Black Diamond’ plum, ‘Papaz’ plum, ‘Aprikoz’ and ‘Hacıhaliloğlu’ apricots grafted on ‘Rootpac-20’.
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    Graft-compatibility of rootpac rootstocks with nectarine and peach cultivars
    (International Society for Horticultural Science, 2020) Çetinbaş, M.; Butar, S.; Koçal, H.; Sesli, Yılmaz; Seferoglu, H.G.
    Interspecific hybrids or clones from different Prunus species can be used as rootstocks for peaches. Recently, the Rootpac rootstocks have been released and begun to be used for peaches. Therefore, grafting aptitude and their compatibility with peach and nectarine cultivars should be examined. The aim of this study is to determine the graft-compatibility performance of different clonal Rootpac rootstocks with peach and nectarine cultivars. Graft unions of peaches and nectarines on Rootpac rootstocks were monitored at the Fruit Research Institute in Eğirdir, Isparta, Turkey. The peach cultivars 'Monroe', 'Royal Glory', 'Q'Henry', 'Vista Rich', 'Cresthaven' and the nectarine cultivar 'Venus' were T-budded on Rootpac-R, Rootpac-90, Rootpac-70, Rootpac-40 and Rootpac-20. The graft samples were evaluated with a microscope at 1, 4 and 12 months after budding. Cambial differentiation occurred after a callus bridge was formed between the two parts of the graft. The graft union and development was observed to be successful. Consequently, no evidence for histological incompatibility was found. In addition, no incompatibility visual symptoms (drying, chlorosis on the leaves, premature death of the trees, marked difference in the growth rate or vigor of scion and stock, over growth at, above or below the graft union, etc.) were observed until the third vegetative season of the budded trees. © 2020 International Society for Horticultural Science. All rights reserved.