ISSN 1311-9109 Journal Content





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International Symposium
on Production and Establishment of Micropropagated Plants
April 19-24, 2015,
Sanremo, Italy


Propagation of Ornamental Plants
8(1): 23-27, 2008

ENHANCING THE ROOTING OF CANADA YEW STEM
CUTTINGS WITH IBA TREATMENTS

Laurie Holloway1*, Marek Krasowski1,
Ronald F. Smith2, and Stewart I. Cameron3

1Faculty of Forestry and Environmental Management,
University of New Brunswick, P. O. Box 44555, Fredericton, NB, E3B 6C2,
Canada, Fax: + 506 453 3538, *E-mail: p166h@unb.ca
2VarFor Ltd., 12 Chateau Drive, McLeod Hill, NB, E3A 5X2, Canada
3Natural Resources Canada, Canadian Forest Service - Atlantic Forestry Centre,
1350 Regent St. South, Fredericton, NB, E3B 5P7, Canada


Abstract
Studies on rooting stem cuttings of Taxus canadensis Marsh., a shrub containing an anti-cancer chemical, paclitaxel, are reported. Dipping the stem base in a powder (0.8% IBA) improved neither the rooting nor the growth of adventitious roots (compared with controls) regardless of predetermined clone rooting abilities. Quick dips in concentrated IBA (0, 0.5, 1.0 1.5 and 2.0% in 50% ethanol) stimulated rooting, with 0.5% and 1.0% producing the best survival, while the 2% dip gave the best root growth. Clone ortets classified as good or recalcitrant (difficult to root) did not differ significantly in their Ingestad nutrient ratios and in foliar macronutrient concentrations, except for Ca, which had a greater concentration and larger ratio in the recalcitrant category. Concentrations of N and P were positively correlated with the rooting percentage, whereas K and Mg concentrations were negatively correlated.

Key words: concentrated-hormone solution, foliar nutrient concentration, indole-3-butyric acid (IBA), ingestad ratios, rooting, rooting powder, stem cuttings, Taxus canadensis



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