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Long-Term Effects of Gibberellin on the Growth of Loblolly Pine Seedlings

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A study of the long-term effects of gibberellin on the growth of potted loblolly pine seedlings was carried out from June 1958 to Oct. 1959. Seedlings growing under long-day photoperiod were treated monthly for 9 months with gibberellin, in aqueous solution and in hydrous lanolin paste. Concentrations of 10, 100 and 1000 ppm of gibberellin were used in spray applications while 50 mg of pure lanolin (control), 25, 50 and 75 mg of lanolin containing 1% GA were used in hydrous paste application. Although spray applications of gibberellln produced significant increases in height growth (observed for 17 months), when treatment was discontinued the difference between treated and control seedlings decreased. The most consistent effect of gibberellin on loblolly pine seedlings seems to be reduction of root-shoot ratio.

Document Type: Journal Article

Affiliations: Research Forester, Northeastern For. Expt. Sta., Forest Service, Bington, Vermont

Publication date: 1963-06-01

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.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 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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