Abstract
Dormant Taxus cuspidata cuttings were treated with talc dusts containing 1- and 2-γ-naphthylbutyric acid at concentrations of 0, 500, 1000, and 2000 p.p.m., each taken separately and in combination with 0, 0.1, 1, and 10% of a mixture of nutrient salts and 0 and 50 p.p.m. of ethyl mercuric bromide. Data on the number of rooted cuttings failed to disclose any significant treatment effects. However, the number and length of roots per rooted cutting were increased by the phytohormone in all concentrations, the effect increasing with ascending concentration. Data for most of the other criteria indicated injurious effects from the phytohormone. The average length of new growth was increased by both the 1 and 10% concentrations of nutrient salt in the presence, but not in the absence, of 1000 p.p.m. of the phytohormone. The 10% concentration of nutrient salts decreased the number of cuttings with new growth and the number of such cuttings that were rooted. Organic mercury treatment failed to have any significant effects.
Published Version
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