Study of rooting in shoots of Rosa damascena Mill. through simple layering under different hormone treatments in two different seasons

Because of the economic and medicinal importance of Rosa damascena Mill. the propagation of this plant was considered. In order to protect the selected genotypes, this experiment was performed by simple layering method during autumn and winter seasons 2007 on new growth twigs of Rosa damascena mature shrubs. The branches were laid in sand bed, soaked for 24 h by different concentrations of IBA and NAA hormones. The results showed that the rate of rooting was high in sand bedding material in autumn and winter. The highest rooting percentage was %100 with 50 mgl-1 concentration of IBA in autumn and winter seasons and the lowest of rooting percentage was %53.33 with 50 mgl-1 concentration of NAA in autumn season. The rooting branches were cut from the parent plants after 3 months and planted in pots containing soil: sand: peatmoss complex (1:1:1) in greenhouse conditions, survival percentage was 90%.