Figure 6From: Factors affecting ozone sensitivity of tobacco Bel-W3 seedlingsUnder the same dosage of O3 exposure, seedlings exposed for 8 hours in one day were more sensitive than seedlings exposed for 4 hours/day in two consecutive days. There was a significant difference between the leaf injury index percentages (LII%) of seedlings exposed to 150 ppb O3 for 8 hours in one day (n = 21) and of those exposed for 4 hours/day in two consecutive days (n = 24, p < 0.001, t-test).Back to article page