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Plant Physiology 51:396-399 (1973)
© 1973 American Society of Plant Biologists

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Articles

Influence of Hydrogen Fluoride Fumigation on the Water Economy of Soybean Plants 1

B. W. Poovaiah2 and H. H. Wiebe

a Department of Botany, Utah State University, Logan, Utah 84321

The influence of hydrogen fluoride fumigation on water economy was studied using soybean (Glycine max [L] Merr.). Fumigation caused partial stomatal closure in 1 hour and practically complete closure within 4 hours. The transpiration rate was greatly reduced by fumigation, while the leaf temperature was increased. Water potential increased after 1 day but fell drastically when necrosis occurred. Effects of interrupted fumigation during the day were somewhat less severe in all respects than those of continuous fumigation; nighttime fumigation caused only minor effects. Fluoride uptake was also much less from nighttime than from daytime fumigations.

2 Present address: Department of Horticulture, Purdue University, Lafayette, Ind. 47907.

1 Supported in part by United States Public Health Service Grant AP 00276-05 from the National Air Pollution Control Administration. Utah Agricultural Experiment Station Journal Paper 1196.






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Copyright © 1973 by the American Society of Plant Biologists