Rooting Response of Branch Cuttings of Teak (Tectona grandis) as Influenced by Season and Growth Hormones

The experiments on ischolar_maining response of branch cuttings of teak, collected from seedlingraised, cutting-raised young and mature trees was conducted in the yur 1986-87. The effect of season and growtb bormones was examined for these three types of cuttings. Seasonal effect was found most important factor in response of callus formation and ischolar_main Initiation. In all cases, maximum ischolar_maining response was observed in May planted cuttings While no ischolar_maining was initiated during winter months. Hormone treatments were found to induce both callus and ischolar_main formation considerably in comparison to untreated cuttings. The best ischolar_maining was seen in IDA 100 treated
cuttings while this auxin in higher concentration (200 ppm) initiated maximum callus formation. Overall ischolar_maining response waS maximum in the cuttings obtained from the seedling-raised trees and cutting raised young trees, and the minimum in the cuttings taken from old trees.