The Effects of Culture Medium and Different concentrations of NAA hormone on Rooting of Medicinal Plant Lavender (Lavandula officinalis.)

Lavender (Lavandula officinalis) is an evergreen, perennial and woody plant belongs to Lamiaceae family. It also has been considered as a medicinal and ornamental plant. In order to determine the effects of culture Medium and NAA hormone concentrations on rooting, an experiment was performed in the greenhouse and laboratory at Isiamic Azad University of Jiroft. In this study, the effect of NAA values at concentrations of 0, 1000, 2000, 3000 and 4000 ppm and different culture medium including perlite, sand, mixtures of peat-perlite and sand-perlite in a factorial experiment with a completely randomized design with four replications was investigated.Number of roots per cutting, fresh and dry weight of root, root length, bud length, number of buds, number of rooted cuttings and number of callus cuttings were recorded and analyzed by variance. Comparison of mean treatments was performed by Duncan's multiple range test. SPSS & SAS softwares were used for statistical analysis of this test. The results showed that the culture medium and the concentration of hormones and their interactions had a significant effect on the studied traits. The highest root length, fresh weight and root dry weight, number of rooted cuttings, number of buds and length of buds were obtained, using a concentration of 4000 ppm of NAA hormone and perlite culture medium and the highest number of roots in the cuttings belonged to the treatment effect, 4000 ppm of NAA hormone and peat-perlite culture medium.