Spermine, in the presence of IBA, affects rooting and growth of cuttings of Rosa damascena Mill. and R. moschata J. Herrm.

摘要

An investigation was carried out to study the effects of wood type (semi-hardwood and hardwood) and spermine (Spm) application on rooting and growth of Damask rose (Rosa damascena) and Musk rose (R. moschata) cuttings. The bases of cuttings were soaked in aqueous solutions containing 0, 1, 2, 3, or 4 mM Spm (plus 200 mg L-1 IBA in each concentration) for 24 hr and then were placed in greenhouse benches containing rooting medium under intermittent mist. In Damask rose, the highest rooting percentage (91.50%), number of roots per rooted cutting (2.58), and root length (8.64 cm) were obtained for hardwood cuttings at 2 mM Spm. Shoot length was not significantly affected by Spm application. In Musk rose, the highest rooting percentage (66.25%) and root length (5.21 cm) were observed in hardwood cuttings at 3 mM Spm. Semi-hardwood cuttings treated with 3 mM Spm showed the highest number of roots per rooted cutting (1.91). The highest shoot length (24.53 cm) was obtained on hardwood cuttings at 4 mM Spm. Overall, in both species, hardwood cuttings treated with 2 to 3 mM Spm, showed the best rooting and growth in the presence of a uniform 200 mg L-1 IBA which can be useful for propagators of these rose species.