concentrations is posing to be a threat for agricultural productivity. Two high yielding tropical
rice cultivars (Malviya dhan 36 and Shivani) were evaluated against different concentrations
of O 3 under field conditions. Experimental design included filtered chambers, non-filtered
chambers having ambient O 3 and 10 and 20 ppb elevated O 3 above the ambient. Study
was conducted to assess differential response if any in induction of antioxidative defense …