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Notes: Effect of Selected Natural and Synthetic Growth Regulators on the Growth of Ponderosa Pine Seedlings

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Experiments with selected naturally occurring and synthetic plant growth regulators applied as a root soak to dormant southwestern ponderosa pine seedlings revealed that only gibberellins (GA3; and GA4/7) significantly increased height growth. The effects of gibberellins on root growth was variable. The regulator o-coumaric acid, significantly increased root ovendry weight. Application of hormones and regulators as a top dip was ineffective. Forest Sci. 28:156-160.
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Keywords: Pinus ponderosa; dormancy; gibberellins; plant hormones; root growth

Document Type: Miscellaneous

Affiliations: Principal Silviculturist, Rocky Mountain Forest and Range Experiment Station

Publication date: 1982-03-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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