Record Display for the EPA National Library Catalog


Main Title Differential Foliar Sensitivity of Soybean Cultivars to Ozone Associated with Differential Enzyme Activities.
Author Tingey, David T. ; Fites, Roger C. ; Wickliff, Carlos ;
CORP Author Corvallis Environmental Research Lab., OR. ;North Carolina State Univ., Raleigh. Dept. of Botany.
Year Published 1975
Report Number EPA/600/J-76/085;
Stock Number PB-289 173
Additional Subjects Ozone ; Soybean plants ; Toxicology ; Sensitivity ; Exposure ; Leguminous plants ; Oilseed crops ; Enzymes ; Leaves(Botany) ; Toxic tolerances ; Experimental data ; Wounds and injuries ; Reprints ; Toxic substances ; Glycine max ; Dehydrogenase/glucose-6-phosphate ; Phenylalanine ; Oxygenase/monophenol-mono ; Ammonia lyase/phenylalanine
Library Call Number Additional Info Location Last
NTIS  PB-289 173 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 6p
Soybean (Glycine max (L.) Merr.) cultivars Dare and Hood were exposed to Ozone (980 micrograms/cu m) for 2 h to determine if differences in cultivar sensitivity were associated with differential activation of selected enzymes. The first trifoliate leaves of the cultivars were in similar stages of development (14 days from sowing) when exposed. The ozone treatment increased the activities of glucose 6-phosphate dehydrogenase, phenylalanine amonia lyase, polyphenol oxidase and peroxidase above the control in both cultivars within 30 hours after exposure. However, the activity of all these enzymes increased several hours sooner in Dare (sensitive) than in Hood (tolerant). The data suggest that the differential sensitivity of these two cultivars to ozone could be based on the differential ozone induced activation of the enzymes involved in the lesion formation process.