Figure 5
Foliar damage observed after a week. Foliar damage observed after a week for three days with O3 exposure of 0 nl l-1(A) and 240 nl l-1(B). The yellowish spot seen on illuminated spots of the leaf and on the tip resulted from the consecutive exposure of O3 for three consecutive days. Black color circle showed foliar damage area. The damage appeared after a week from the start of the exposure. The damage was visible only under 240 nl l-1 and not under 120 nl l-1 although under both levels the damage was irreversible. The illumination spots were identified based on the flour remaining on the leaf after finishing the exposure experiments.