Ozone and sulfur dioxide synergism: injury to tobacco plants.
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.
Menser
H A
HA
Heggestad
H E
HE