اثر غلظت هاي مختلف اكسين ، زمان قلمه گيري و شرايط محيطي بر ريشه زايي قلمه هاي نيمه خشبي دارايي

Effects of Different Concentrations of Auxins,time of Cutting and Environmental Conditions on Rooting of Semi-hardwood Cuttings of Duranta repens L.

The influence of date of cutting, environmental conditions and auxin concentrations on rooting of the stern cuttings of Duranta repens L. was investigated. The leafy semi-hardwood cuttings of Duranta were taken from the mother plants in November 2001 and February 2002. The cuttings were treated with O. 2000, 3000 and 4000 mg/l Indole-3-butyric acid (IBA) and Naphthaleneacetic acid (NAA) and then placed in rooting bed consisted of sand under mist conditions and polyethylene tent. The cuttings of Duranta that treated with 2000 mgr/I NAA, showed the highest rooting percentage. Cuttings were taken in February and treated with 4000 mg/l IBA and or 2000 mg/I NAA gave the highest number of roots. Length of the longest root, root length, dry weight of roots and new growth of buds of Duranta cuttings were significantly the higher when the cuttings were taken in February and treated with 4000 mg/I IBA. Cuttings collected in February and treated with auxins, had significantly higher rooting and new growth of buds. Rooting percentage of cuttings which treated with auxins under mist condition and polyethylene tent, were not significantly different but number of roots and dry weight of roots were higher in cuttings that placed in mist conditions. Root length of cuttings that treated with auxins and placed under polyethylene tent, was significantly higher than other conditions.