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Notes: Transpiration and Leaf Temperature in Eastern Cottonwood

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In summer at midday in central Mississippi, juvenile plants transpiring 10 to 16 X 10-6 g/cm²/sec had leaves cooler than surrounding air. Leaves transpiring less than 4 X 10-6 g/cm²/sec were warmer than the surrounding air. Degree of transpiration cooling was negatively correlated with internal water deficit. Leaf diffusion resistances computed from transpiration and temperature data were less than 1.0 sec/cm for freely transpiring plants and from 20.0 to 40.0 for plants under severe moisture stress.

Keywords: Populus deltoides; diffusion resistance; water deficit

Document Type: News

Affiliations: Plant Physiologist, Division of Forestry Development, Tennessee Valley Authority, Norris, Tenn.

Publication date: 1969-06-01

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  • 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
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    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
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