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Effects of Water Stress on Biomass Partitioning of Ponderosa Pine Seedlings During Primary Root Growth and Shoot Growth Periods

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Biomass partitioning patterns of ponderosa pine (Pinus ponderosa Dougl. ex Laws.) seedling genotypes were investigated under greenhouse conditions at different levels of water stress applied during either the early season root or shoot growth period. The growth of seedlings varied in response to the season in which water stress occurred and among water stress levels. Water stress applied during the shoot growth period resulted in a significantly higher fine root:current-year foliage biomass ratio than seedlings stressed during the root growth period. Seedlings subjected to the high water stress treatment during shoot growth also had the highest fine root:current-year foliage biomass ratio of all treatment combinations. Differences in biomass partitioning among families of ponderosa pine were also present for all treatments combined, suggesting biomass partitioning to roots and shoots is partially under genetic control. For. Sci. 41(3):594-610.

Keywords: Pinus ponderosa; fine roots; root:shoot ratio; seasonal growth pattern

Document Type: Journal Article

Affiliations: Professor, School of Forestry, Box 15018, Northern Arizona University, Flagstaff, AZ 86011

Publication date: 1995-08-01

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.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 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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