Ozone Damage to Plants

Comparative Ozone Dose Response of Gas Exchange in a Ponderosa Pine Stand Exposed to Long-Term Fumigations

“…It is more likely that trees exhibiting fewer 03-injury symptoms represent ecotypes with lower light-saturated conductances irrespective of O3 levels, which could lead to partial stress avoidance in the current needles. However, in 1 and 2-yr needles, the stomates of the more injured trees had the lower conductances, indicating accelerated senescence 19 …”

Photosynthesis and Stomatal Light Responses in Snap Beans Exposed to Hydrogen Sulfide and Ozone

“…Ozone-induced premature senescence has been reported in pinto bean 25 and other species. 26 The stress-related decline in P mox K indicates a loss in photochemical conversion efficiency. This would be expected because chlorotic and necrotic foliar symptoms were evident at higher H 2 S concentrations.…”

Ozone Injury in Soybeans

“…It is well accepted that the primary toxic effect of ozone in many plants is probably on membrane permeability (9,11). We suggest that this effect directly accounted for the early desiccation and necrosis of ozonetreated soybean leaves, observed especially when high doses were used.…”