Effect of IBA, brassinosteroid, and bacterial applications on rooting of some rosehip (Rosa canina L.) genotypes by hardwood cuttings

Rosehip is a species whose environmental and economic importance is increasing by the day. This study was conducted in order to determine the effect of auxin, brassinosteroid and bacteria for the adventitious rooting of hardwood cuttings belonging to the SRG 17 and SRK 26 genotypes, which were previously obtained by selection from the province of Yozgat. In the study, hardwood cuttings taken in February were treated with the single, double and triple combinations of IBA (2000 ppm), 24-eBL (0, 0.25, 0.50 and 1.00 ppm) and a commercial bio prepare containing bacteria species of Pseudomonas fluorescens, Paenibacillus polymyx, Bacillus megaterium and Pantoea agglomerans. After combined treatment, they were planted in perlite+peat medium and removed after three months. While the highest rooting rate of 40% in SRG17 genotype was obtained from the triple combination of Bacteria + 24-eBL (0.50 ppm) + IBA (2000 ppm), it was obtained from Bacteria application with 43.33% in SRK26 genotype. Bacteria + 24-eBL (1.00 ppm) + IBA (2000 ppm) triple combination in SRG17 genotype in terms of root length and root number provided the highest values with 8.38±4.32 (cm) and 21.00±9.00 pcs, respectively. In the SRK26 genotype, 11.18±1.41 cm root length and 36.00±12.25 pcs were obtained from the 24-eBL (0.50 ppm) + IBA (2000 ppm) binary combination. The viability rates were determined three months after the rooted cuttings were taken into the pots, and the SRG17 genotype provided 100% survival in the binary combination Bacteria + 24-eBL (0.50 ppm) and 50% in the SRK26 genotype in the 24-eBL (0.50 ppm) application.