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Provenance Variation in Growth of Seedling Apices of Sitka Spruce

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Shoot apex development is described for seedlings of Picea sitchensis (Bong.) Carr, from 47 provenances. The three stages previously used to describe the development of the shoot apex of other conifers are applicable to this species, but times of initiation and duration of each stage vary among the provenances. Anatomical evidence confirmed morphological evidence for a pattern of developmental variation that was closely related to the natural distribution of the species. Elongaton and needle production continued into July for seedlings from Alaska and into September for those from California. Bud scale production followed and extended for approximately one month. The rest stage extended until April, with only two weeks separating the first and last provenances in time of spring flushing. The size and shape of the shoot apex varied during these stages but the zonation pattern could not be distingusihed consistently.
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Document Type: Journal Article

Affiliations: Forest Geneticist (attacked from Unesco), Agric. Research Council of Central Africa, P.O. Box 1210, Kitwe, Zambia

Publication date: 1966-06-01

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  • 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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