| Abstract: | Ozone toxicity was studied in peas, beans, and tobacco (BelB and Bel W3). These experiments showed that ozone toxicitywas related to the rates of ethylene biosynthesis. Sensitivityto ozone was reduced if ethylene biosynthesis was inhibitedafter treatment with aminoethoxyvinylglycine (AVG). Similarly,plants that were able to reduce or prevent stress ethylene formationwere less sensitive after both short- and long-term exposureto ozone. Plants conditioned by longer exposures to ozone havelow rates of ethylene formation and this may be why brief ozoneexposures may be more phytotoxic than prolonged fumigations. Key words: Nicotiana tabacum, Phaseolus vulgaris, Pisum sativum, lipid peroxidation, peas, Pinto beans, tobacco |
