Notes: Transpiration and Leaf Temperature in Eastern Cottonwood
Abstract: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.
Document Type: News
Affiliations: Plant Physiologist, Division of Forestry Development, Tennessee Valley Authority, Norris, Tenn.
Publication date: 1969-06-01
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