Plant Physiol. Drug Metab Dispos
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Plant Physiology 60:645-647 (1977)
© 1977 American Society of Plant Biologists

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A Miniature Stem Thermocouple Hygrometer 1

Burlyn E. Michel

a Department of Botany, University of Georgia, Athens, Georgia 30602

An unprotected chromel-constantan thermocouple was mounted in a cavity (4 x 2 x 1 mm) with rounded corners in a chrome-plated brass block (10 x 6 x 4 mm). When installed against a soybean (Glycine max [L.] Merr.) xylem face, sealed with caulking gum, and insulated with polyurethane foam and aluminum foil, even rapidly changing stem water potentials could be followed accurately. Temperature gradients can be a problem.

1 This research was supported by the USDI/OWRR as Project A-051-GA.






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ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1977 by the American Society of Plant Biologists