Selection of Transplanting Soil for Acclimatization of in vitro Cultured Grapevine Plantlets

This experiment was carried out to select the optimal transplanting soil mixture for acclimatization of in vitro cultured grapevine plantlets. In vitro cultured grapevine plantlets of ‘Rizamat’ were transplanted onto five soil mixtures. The tested soil mixtures were vermiculite 100%, granulated cotton 100%, vermiculite 70%＋perlite 30%, vermiculite 70%＋peat moss 30%, and vermiculite 50%＋perlite 50%. Survival percentage of transplanted plantlets was high in the plantlets with more than 5 leaves at transplanting time. After 30 days of transplanting, the high survival percentage of plantlet was observed when plantlets were transplanted in granulated cotton 100% and vermiculite 70%＋peat moss 30%. The number of leaves, plant height and the length of root were highest in granulated cotton 100%. The root growth of transplant, in terms of root weight and root number, was best in vermiculite 70%＋peat moss 30%.