Effect of Season, Position of Node and Growth Regulating Substances on Adventitious Root Induction in an Edible Bamboo, Dendrocalamus brandish (Munro) Kurz.

Dendrocalamus brandisii is a large size sympodial edible bamboo species of India and Myanmar with multifarious uses. A study was conducted to find out the effect of three seasons - summer, rainy and winter and three different positions of culmbase, middle and top and five different concentrations of two growth regulating substances - NAA and IBA on adventitious ischolar_main induction in this species. Factor analysis of the observations revealed the significant influence of interaction effects (P=0.01) of season, position and growth regulating substance on growth attributes like height and collar girth of the sprouts, ischolar_maining percentage, number of ischolar_mains and length of the longest ischolar_main. Out of the three seasons, summer season and of the three positions, basal portion gave maximum ischolar_maining. Application of growth regulating substances increased the number of ischolar_mains. Clustering of different treatment combinations identified the cuttings collected in summer season from basal portion of the culms treated with IBA 200 ppm as the superior treatment.