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Bud and Cambial Activity in Douglas-fir as Related to Stem Cutting Rootability

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Controlling factors in bud and cambial activity and their relation to rooting in Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco, stem cuttings were studied through two successive growth cycles. Stem cuttings of current season's growth were taken periodically from three 45- to 50-year-old sheared field-grown Douglas-fir trees. Cambium had no endogenously controlled dormancy. Auxin treatment increased cambial activity at the base of the cutting which subsequently increased rootability during pre- and post-dormancy. Rooting was least in October when bud dormancy was most pronounced. Auxin treatment with or without buds was not effective in stimulating rooting during true dormancy and cold treatment was required. No apparent relationship between stem cutting rootability and presence or absence of buds was observed. Forest Sci. 21:269-275.

Keywords: Pseudotsuga menziesii; root initiation; vegetative propagation; xylem

Document Type: Journal Article

Affiliations: Professor of Horticulture, Oregon State University, Corvallis

Publication date: 1975-09-01

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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