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Science 14 March 1969:
Vol. 163. no. 3872, pp. 1209 - 1210
DOI: 10.1126/science.163.3872.1209
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Articles

Plant Injury by Air Pollutants: Influence of Humidity on Stomatal Apertures and Plant Response to Ozone

Harry W. Otto 1 and Robert H. Daines 2

1 Atmospheric Chemistry Project, Products Research Division, Esso Research and Engineering Company, Linden, New Jersey 07036
2 Department of Plant Biology, Rutgers, The State University, New Brunswick, New Jersey 08903

Ozone injury to Bel W3 tobacco and pinto bean plants increases with increasing humidity. The degree of plant injury sustained correlates well with porometer measurements; this indicates that the size of stomatal apertures increases with increasing humidity. Humidity may therefore influence plant response to all pollutants and may account in part for the greater sensitivity of plants to ozone-type injury in the eastern United States compared with the same species of plants grown in the Southwest. with those grown in the Southwest.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Relative Humidity: Important Modifier of Pollutant Uptake by Plants.
S. B. McLAUGHLIN and G. E. TAYLOR (1981)
Science 211, 167-169
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