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Root Growth Potential and Starch Differences in Seedlings of Six Families of Genetically Improved Loblolly Pine

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The relationships among root growth potential, total fresh weight, and starch levels of six genetically improved families of loblolly pine (Pinus taeda L.) were examined during a test of root growth potential, with special focus on clarifying changes in starch concentrations as determined by destructive analysis. Seedlings were operationally grown and root-wrenched in a nursery, lifted in January and subjected to 14 days of cold storage at 3°C (38°F), then placed in a tank system in a greenhouse under extended 16-hr days and 30°-16°C (85°-60°F) day-night temperatures. Measurements taken over a 30-day period showed that (1) the percentage of starch initially in the roots was not related to root growth potential expression after 30 days, (2) the starch in new white lateral roots after 30 days was not related to root growth potential, and (3) seedlings that produced new roots tended to have more total starch in all plant parts than those that did not. For. Sci. 38(2):448-456.

Keywords: Fine roots; Pinus taeda L; conifer; maintenance requirements; water status

Document Type: Journal Article

Affiliations: Assistant Professor and Project Leader of the Nursery Technology Cooperative, Oregon State University, Corvallis, OR 97331

Publication date: April 1, 1992

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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