Document Type : Research Paper



This research was to evaluate the effect of different concentrations of Indole -3- butyric acid (IBA) “0, 2000, 4000, 6000 mg.l-1”, 1-naphtalene acetic acid (NAA) “0, 1000, 2000, 3000 mg.l-1” and their interactions on the rooting of semi-hardwood cuttings of kiwifruit (Actinidia deliciosa) Hayward cultivar. The experiment was carried out as factorial design with two factors (including Factor A= IBA levels and Factor B= NAA levels) by 3 replications in RCBD (Randomized Complete Block Design) with 16 treatments. The study was done at Islamic Azad University, Rasht Branch. The cuttings were planted in sand: perlite (1:1 v/v) rooting medium under mist. Results showed that the effect of auxins on callus production, root number, root length, fresh and dry weight, rooted cuttings percentage and rooting rate was significant (P≤1%). The highest root number, fresh and dry weight were obtained by 6000 mg.l-1 of IBA + 2000 mg.l-1 of NAA. The cuttings produced the longest roots at 6000 mg.l-1 of IBA + 1000 mg.l-1 of NAA. The highest level of IBA (6000 mg.l-1) increased rooted cuttings percentage (83.33%) and callus production. The highest rooting rate was obtained by 4000 mg.l-1 of IBA + 3000 mg.l-1 of NAA and 6000 mg.l-1 of IBA + 2000 mg.l-1 of NAA. Altogether, 6000 mg.l-1 of IBA + 2000 mg.l-1 of NAA are the best treatment for rooting of semi-hardwood cuttings of kiwifruit.