Journal of Nuts (Jun 2024)
The Effects of Various Concentrations of IBA Hormone on Rooting of ‘TF92’; New Peach-Almond Hybrid under Ex- vivo and In - vitro Conditions
Abstract
One of the main problems of fruit cultivation, especially peaches and almonds, is the lack of the application of the existing clone rootstocks such as the promising hybrid of peaches and almonds and its unavailability due to its propagation in Iran. So the seedling rootstocks are inevitably used. However these rootstocks cause many problems for the growers due to the lack of uniformity. In order to solve this problem, the effect of different concentrations of indole butyric acid on the rooting of hardwood cuttings ‘TF92’ (promising hybrid of peach and almond) was tested in a private sector greenhouse in Karaj equipped with a heating pad during 2019. In this paper, the effect of 4 different levels of indole butyric acid hormone (IBA) 0, 1500, 2500 and 3500 parts per million in solution on hardwood cuttings was studied in a completely randomized design in three replications. The results showed that there was a significant difference between various concentrations of indole butyric acid in terms of the effect on the characteristics of the mode of investigation such as the percentage of rooting, the number of roots formed, the dry weight of the roots, the length of the roots and the length of the resulting branches in the cuttings. Thus the highest rooting percentage (78.45) was found in the indole butyric acid (IBA) hormone treatment with a concentration of 2500 mg L-1 compared to other treatments. Therefore, this method can be recommended as a suitable treatment for the rooting of wood cuttings of this promising emerging rootstock. Also, the highest percentage of rooted plantlets was obtained on Murashige and Skoog medium (MS) supplemented with 1 mg L-1 IBA. According to this study, the concentrations of 1 mg L-1 IBA results in the maximum rooting, and it has been suggested as a suitable hormone for in vitro rooting of ‘TF92’.
