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Some counteractive effects of antitranspirants
D C Davenport1, M A Fisher, R M Hagan
1Department of Water Science and Engineering, University of California, Davis, California 95616.
Plant Physiology
|May 1, 1972
Summary
Antitranspirants unexpectedly widen stomatal apertures, increasing leaf water potential. Despite concerns about reduced photosynthesis, these compounds can paradoxically enhance plant growth, particularly in fruits and shoots.
Area of Science:
- Plant physiology
- Agricultural science
Background:
- Antitranspirants are commonly used to reduce water loss in plants.
- Their effects on stomatal behavior and overall plant growth are not fully understood.
Purpose of the Study:
- To investigate the unexpected effects of antitranspirants on stomatal function and plant growth.
- To discuss the implications of these findings for agricultural applications.
Main Methods:
- Describing the effects of antitranspirant films on stomatal resistance and leaf water potential.
- Observing changes in stomatal aperture under and around antitranspirant-treated areas.
- Assessing the impact on photosynthesis and overall plant growth (shoots and fruits).
Main Results:
- Antitranspirant films significantly increase resistance to water vapor diffusion from stomata.
- Leaf water potential increases, leading to wider stomatal apertures beneath the film and on untreated leaf areas.
- Contrary to expectations of reduced photosynthesis, antitranspirants enhanced the growth of fruits and shoots.
Conclusions:
- Antitranspirants have complex effects on plant physiology, influencing stomatal behavior and water relations.
- The observed enhancement of plant growth suggests potential benefits beyond simple water conservation.
- Further research is needed to optimize antitranspirant use for improved crop yields.
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