Effect of Bending and Plant Growth Regulators on Maximizing the Yield and Quality of Rose (Rosa hybrida Var., Tajmahal) under Greenhouse Conditions

An experiment was conducted to study the effect of bending and plant growth regulators to maximize the yield and quality of rose variety “Tajmahal” under naturally ventilated polyhouse. From the results of the study, a highly significant interaction effect was observed with respect to various plant parameters. Among the interactions, bending at shoot junction bud (B₁)+ BA 200 ppm (G₄) significantly recorded highest plant height (165.33 cm), plant spread (45.19 cm²), early flower bud appearance (26.40 days), minimum duration for harvest (48.80 days), increased stem length (86.79 cm), increased circumference of flower bud (13.13 cm), flower stem girth (0.87 cm), maximum number of cut flowers per plant (26.47) and extended vase life of 12.37 days. The stomata aperture value ranges between (length 25 to 28 μm, width 8.0 μm, length 21 to 25 μm, width 8.0 to 12 μm) for control and treatment respectively. Differences between normal and treatment stems are also apparent in the vascular tissue organization and parenchyma cells. It is clear from the study that plant growth parameters, yield and quality of flowers were found to be superior by doing bending practice at shoot junction bud along with the application of BA at 200 ppm for thevar. Tajmahal.