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Rosa damascena is very important for essential oil production, medicinal   properties and it is also widely cultivated as a garden rose. The Rose   species is mainly propagated by stem cutting. In the present study, the   effect of different levels of 0, 500 and 1,000 mg l-1 (quick dip method for   20 s) of indole butyric acid (IBA) on the rooting of 12 wild genotypes   (including: Kurdistan 1 to Kurdistan 12) of R. damascena was investigated.   The results show that the rooting ability of R. damascena differs   significantly between the twelve genotypes. The highest rooting (79.56%) and   callus production (69.08%), number of roots (8.33), root fresh and dry   weights (361.80 and 244.74 mg, respectively) were recorded in Kurdistan 5   genotype with 1,000 mg l-1 IBA. The maximum root length (5.84 cm) was   observed in Kurdistan 5 genotype with 500 mg l-1 IBA that showed a   significant difference compared to the control treatment (0.96 cm). The   highest number of leaves per bud (7.33 at 500 mg l-1 IBA) and number of buds   (5.00 at 1,000 mg l-1 IBA) were recorded in Kurdistan 1 genotype. The current   study demonstrated that the different genotypes of R. damascena were in a   difficult-toroot state, which suggests that cutting treatment with 1,000 mg   l-1 IBA overcame the problem of the difficult-to-root state, and it can also   enhance the rooting percentage in the studied genotypes

Study of indole butyric acid (IBA) effects on cutting rooting improving some of wild genotypes of damask roses (Rosa damascena Mill.)