<i>In vitro</i> propagation of <i>Rosa hybrida</i> L. cv. Al-Taif Rose plant

Abstract

In this study, a protocol for in vitro propagation of Rosa hybrida L. cv. Al-Taif Rose was established using nodal segments harboring axillary buds as explants. In vitro stages of shoot initiation, multiplication and elongation were performed. Explants were cultured on solid Murashige and Skoog medium (MS) supplemented with different concentrations of benzyl aminopurine (BAP, 1, 2 and 3 mg/l) in combination with 1 mg/l kinetin (Kn). Effect of different concentrations and combinations of indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) on root formation of shoots were studied. The highest percentage of shoot initiation (85%) was observed on MS medium containing 2 mg/l BAP + 1 mg/l Kn, whereas maximum average number of multiplied shoots (2.7) was produced on MS medium with 3 mg/l BAP + 1 mg/l Kn. Highest average number of elongated shoots (26.7) was noticed on MS medium containing 1 mg/l BAP and 1 mg/l Kn. For rooting, highest percentage (66.7%) of rooted shoots was obtained on MS medium supplemented with 2 mg/l IBA. Plantlets with 4 to 5 roots of 3 to 5 cm length were successfully transferred to pots containing sterile peat moss for acclimatization.

Keywords: Rosa hybrid L. cv. Al-Taif Rose, axillary bud explants, in vitro propagation, multiplication, acclimatization