Ozone and Sulfur Dioxide Synergism: Injury to Tobacco Plants

Science  22 Jul 1966:
Vol. 153, Issue 3734, pp. 424-425
DOI: 10.1126/science.153.3734.424


Tobacco plants displayed ozone-type injury when exposed to mixtures of ozone and sulfur dioxide at subthreshold concentrations. The syndrome suggests synergism between ozone and sulfur dioxide that lowers thresholds to injury; exposure to the individual gases at the mixed-gas concentrations caused no symptoms.