Rooting Response of Semi-hardwood Shoot Cuttings of Grewia optiva and Lagerstroemia parviflora

Adventitious rhizogenesis in semi-hardwood shoot cuttings of two 'ischolar_maining recalcitrant' forestry species, Grewia optiva and Lagerstroemia parviflora was investigated. The cuttings of approximately 20 cm length and 1.0 cm diameter were treated with equimolar (2mM) doses of indole 3-butyric acid, sodium acetate, ascorbic acid and thiamine for 24 h by basal dipping. After ten weeks of planting, observations were recorded for sprouting (%), ischolar_maining (%), ischolar_main number, and ischolar_main length and ischolar_main-sprout ratio. Treatment with IBA significantly induced adventitious ischolar_maining (upto 67%) in Grewia optiva. In Lagerstroemia parviflora, treatment of thiamine resulted in significantly better adventitious rhizogenesis than other treatments.