A California air standard to protect vegetation from ozone

Effects of the interaction between ozone and carbon dioxide on gas exchange, photosystem II and antioxidants in rice leaves

“…Up to 90% of photochemical oxidants are the secondary pollutant ozone (O 3 ) (Cabrera et al 1988). The Japanese environmental quality standard for photochemical oxidants is set at < 0.06 cm 3 m -3 , and when it exceeds 0.12 and 0.24 cm 3 m -3 , local public bodies must, under the regulations, dispatch an oxidant warning and an alarm, respectively (Nakanishi et al 2009).…”

Relation between O3-Inhibition of Photosynthesis and Ethylene in Paddy Rice Grown under Different CO2Concentrations

“…Bureau Environ., 2005). Of photochemical oxidant components, 90% or more are O 3 (Cabrera et al, 1988;Nouchi, 2001). When exposed to O 3 , rice plants suffer damage: inhibition of net photosynthetic rate (P N ), stomatal conductance (g s ) and PSII (Imai and Kobori, 2008;Imai, 2011a, 2012a), decreased ribulose 1,5-bisphosphate carboxylase/oxygenase (Ishioh and Imai, 2005), chlorophyll and carotenoid (Rai and Agrawal, 2008) contents and nitrite reductase activity (Kobayakawa and Imai, 2011b), in addition to visible leafrelated symptoms (Imai and Kobori, 2008) and breakdown of the cellular ultrastructure (Toyama et al, 1989).…”

Inclination Angle Affects Ozone Injury in the Flag Leaf of Rice

“…There is also a growing concern that the long distance transport of air pollution increases the background O 3 concentration (Ohara, 2011). Of the photochemical oxidant components, 90% or more is O 3 (Cabrera et al, 1988;Nouchi, 2001). The Japanese environmental quality standard for the concentration of photochemical oxidants is 0. , local public bodies are obligated to issue a warning and an alarm, respectively (Nakanishi et al, 2009).…”