Effect of Plant Growth Regulators (PGRs) on the Rooting behavior of Hardwood Cuttings of Alstonia scholaris

An experiment was conducted to evaluate the vegetative propagation of Alstonia scholaris.Stem cuttings were sourced from superior genotypes selected from the surrounding areas of Bihar.The study aimed to assess the effects of different concentrations of auxins on the rooting behavior of stem cuttings.The results revealed significant variations in rooting behavior across treatments, highlighting the critical role of auxins in successful propagation.The study developed a practical and efficient protocol for rapid cutting propagation, recommending an IBA concentration of 1000 mg L as optimal for achieving maximum rooting in Alstonia scholaris stem cuttings.This treatment demonstrated the highest rooting percentage, number of roots, sprouting percentage, root length, shoot length, root biomass, shoot biomass, and total biomass, underscoring the importance of auxin concentration in vegetative propagation.With a rooting success rate exceeding eighty percent, the protocol is expected to facilitate the large-scale production of clonal plantations of Alstonia scholaris.