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Notes: Maturation of Blue Spruce Cones

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Cones of eight blue spruce trees at two locations in Colorado were collected biweekly from approximately one month after initial female receptivity until natural seed shedding. Seeds were extracted and germinated in petri dishes at time of collection and microscope slides of developing ovules prepared. Germination speed and percentage peaked six weeks before natural seed release for low altitude trees (5000 ft) and four weeks before natural seed release for high altitude trees (7600-8500 ft). Peaks for both altitudes were reached about 75 to 80 days after initial female receptivity. A differentiated embryo was necessary in the ovule for germination to proceed. Forest Sci. 20:47-50.

Keywords: Embryo; Picea pungens; phenology; seed germination

Document Type: Miscellaneous

Affiliations: Professor of Forest Genetics, Forest and Wood Sciences Department, Colorado State University, Fort Collins

Publication date: March 1, 1974

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

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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