Section 3
Chapter 2,824

Effects of plant growth regulators on sturdiness of jack pine seedlings

Schnurr, J.P.; Cheng, Z.M.; Boe, A.A.

Journal of Environmental Horticulture 14(4): 228-230


ISSN/ISBN: 0738-2898
Accession: 002823811

Seven growth regulators (ancymidol, 6-benzylaminopurine, ethephon, flurprimidol, mefluidide, paclobutrazol, and uniconizole) at various concentrations were studied for their effects on sturdiness of greenhouse grown seedlings of jack pine (Pinus banksiana Lamb.), measured by a single parameter, growth modification index. All growth regulators at certain concentrations were effective in reducing plant height but none increased stem caliper. Several growth regulators increased shoot-to-root dry weight ratio. Benzylaminopurine greatly modified growth characteristics and resulted in deformed seedlings. Uniconizole was most promising for producing sturdier seedlings of jack pine.

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