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Measuring Short-term Shoot Elongation of Douglas-fir Seedlings in Relation to Increasing Water Potential

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A technique is described for measuring shoot elongation in seedlings of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) under various levels of water potential. The seedlings were grown from seed in plastic pots. A recording micrometer, with two displacement-sensing transducers, was attached to the shoot of one seedling in a pot. Changes in shoot length were measured and recorded continuously before and after soil in the pot was watered. This technique of using two devices that are differentially connected, instead of a single device, makes possible a significant reduction in errors of measurement. Two phases of shoot elongation were observed after watering. In phase I, the rate was rapid and probably caused by rehydration of plant tissue. In phase II, the rate was more constant and probably caused by cell elongation. Forest Sci. 22:378-382.
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Keywords: LVDT; Pseudotsuga menziesii; differential measurement; rehydration

Document Type: Journal Article

Affiliations: Assistant Professor, Forest Engineering Department, Oregon State University, Corvallis, Oregon 97331

Publication date: 1976-12-01

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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