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Main Title Impact of O3 on Leaf Construction Cost and Carbon Isotope Discrimination.
Author Tingey, D. T. ; Hogsett, W. E. ; Rodecap, K. D. ; Lee, E. H. ; Moser, T. J. ;
CORP Author Corvallis Environmental Research Lab., OR. ;ManTech Environmental Technology, Inc., Corvallis, OR.
Publisher c1994
Year Published 1994
Report Number EPA/600/J-94/509;
Stock Number PB95-148714
Additional Subjects Ozone ; Leaves(Botany) ; Crop response ; Air pollution effects(Plants) ; Plant metabolism ; Isotopic labeling ; Long term effects ; Exposure ; Environmental effects ; Carbon 13 ; Plant tissues ; Stomata ; Carbon isotopes ; Reprints ; Bush beans ; Water use efficiency
Library Call Number Additional Info Location Last
NTIS  PB95-148714 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 17p
Bush bean (Phaseolus vulgaris L.) plants were exposed to O3 in open-top field-exposure chambers in early and late season studies at Corvallis, Oregon. Plants were grown in cultural systems that permitted the daily measurement of plant water use and exposed to episodically occurring levels of O3 throughout the growing season. Ozone impaired plant growth and reduced yield. In this study, we tested two hypotheses suggested from studies of the metabolic costs of avoidance and tolerance processes involved in plant response to O3. The first is that O3 increased the carbon construction cost of tissue, and the second is that O3 increased water use efficiency and delta (13)C via stomatal closure and decreased internal carbon dioxide concentration.