اثر زمان قلمه گيري و تيمار IBA بر ريشه زايي و برخي صفات مورفولوژِيكي و فيزيولوژيكي قلمه هاي ساقه كيوي فروت رقم هايوارد

Effect of cutting time and IBA treatment on rooting and some morphological and physiological traits of stem cuttings in kiwifruit (Actinidia deliciosa) cv. ‘Hayward’

Rooting of woody cuttings is a restricted factor in propagation of woody plants. In order to evaluate the effects of cutting time and different concentrations of indole-3-butyric acid (IBA) on rooting potential of cuttings of kiwifruit (Actinidia deliciosa cv. Hayward)، a factorial experimental was carried out based on completely randomized design. The main factor included two cutting times (late-January and mid-March) and the sub factor included 0 (as control)، 2500، 5000 and 7500 mg l-1 IBA. Taken cuttings have been cultivated in perlite after treatment with IBA for 5 min. Some traits related to rooting; such as root number and length، physiological; such as root and callus fresh and dry weight and morphological; such as stem length and leaf number were evaluated after three months. The results showed that mid-March cuttings had the largest number of root، root length، root fresh and dry weight، while late- January cuttings had the highest percentage of root dry matter، callus fresh and dry weight، also leaf number. IBA treatment increased traits related to rooting، significantly as the 2500 mg l-1 concentration was the most effective treatment. Treatment of 5000 mg l-1 IBA was induced less rooting with induction of the maximum callus fresh and dry weight. Overall، cutting at mid- March and treatment with 2500 mg l-1 is recommended to rooting the cuttings of kiwifruit cultivar Hayward.