Vol.14. Nos.1 - 4 (2015) pp.11-25
Title:

Seasonal variation on rooting response of branch cuttings of Dendrocalamus giganteus Wallich ex Munro.

Authors:S. Razvi , M. Bakshi, S. Nautiyal and K.R. Hakeem

Abstract:The present investigation was carried out to develop an easy and cheap protocol for mass propagation of this important bamboo species. Branch cuttings collected from mature clumps were treated with different concentrations of auxins such as IAA, IBA and NAA (100, 200 and 500 ppm) in spring, summer, autumn and winter for three consecutive years (March 2008 to February 2011). From the analysis, it was revealed that the variation in treatments among different seasons in relation to rooting percentage was non-significant (P≥0.05). Maximum (63.33%) rooting was also recorded in untreated cuttings in rainy season while minimum (21.83%) rooting were recorded in the cuttings treated with NAA 200 ppm in autumn. As regards to rooting hormones, maximum (40.42%) rooting was discernible in untreated cuttings i.e. control followed by the cuttings (37.71%) treated with IBA 500 ppm, while minimum (28.12%) rooting has been achieved in the cuttings treated with NAA 500 ppm. The treated cuttings showed the rooting behavior in the order: Control> IBA 500 ppm > IBA 200 ppm > IBA 100 ppm > IAA 100 ppm > IAA 500 ppm > IAA 200 ppm > NAA 100 ppm> NAA 200 ppm > NAA 500 ppm. From the present study it was revealed that the maximum rooting can be achieved in the cuttings treated with control (simple tap water). So, this commercially important bamboo species can be propagated without application of rooting hormones which is cost effective and farmer friendly.

Keywords:Vegetative propagation, rooted stem cuttings, Dendrocalmus giganteus

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