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Water Potential and Temperature Effects on Germination of Engelmann Spruce and Lodgepole Pine Seeds

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The effects of water stress and temperature on seedling emergence from soil or germination in solutions were studied with Engelmann spruce and lodgepole pine. Seed emergence or germination was reduced by low water potentials both in soil and in polyethylene glycol solutions. Emergence from soil was about equal at 16° and 25°C but reduced at 35°C. The time lags before initial emergence or germination were similar for both species, and low water potentials resulted in longer time lags. However, the time required for 25 percent emergence at 16°C was about 2 days longer for pine than for spruce. These data suggested that Engelmann spruce establishment may occur more rapidly than that of lodgepole pine in cool environments. Seedling emergence was similar using 2 nursery soils which differed widely in their effects on subsequent seedling growth. Forest Sci. 23:27-33.
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Keywords: Picea engelmannii; Pinus contorta; water stress

Document Type: Journal Article

Affiliations: Staff Research Associate, Department of Plant Sciences, University of California, Riverside

Publication date: 1977-03-01

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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