7.5 Impact of Ground-Level O 3 on Plants
High O 3 concentrations cause severe plant damage through a three-step process:
exposure, uptake, and bio-effect. Ozone mainly enters plants through leaf stomata,
and the entry of O 3 could be controlled by stomata. After O 3 molecular enters a
substomatal cavity, it quickly binds with molecules of the adjacent cell walls or of
the outer cell membrane. The intercellular O 3 concertation is almost zero because of
very quick chemical reactions occurring in that part of a plant. Nevertheless, the
Fig. 7.7 Predicted (for years 2010–2050) average annual values of ground-level O 3 concentrations
(ppb) shown relative to the values of 2000 year under the four RCPs. (This figure was adapted from
Zhu and Liao (2016) with permission by Elsevier)
7 Contribution of Atmospheric Reactive Nitrogen to Ozone Pollution in China
145
High O 3 concentrations cause severe plant damage through a three-step process:
exposure, uptake, and bio-effect. Ozone mainly enters plants through leaf stomata,
and the entry of O 3 could be controlled by stomata. After O 3 molecular enters a
substomatal cavity, it quickly binds with molecules of the adjacent cell walls or of
the outer cell membrane. The intercellular O 3 concertation is almost zero because of
very quick chemical reactions occurring in that part of a plant. Nevertheless, the
Fig. 7.7 Predicted (for years 2010–2050) average annual values of ground-level O 3 concentrations
(ppb) shown relative to the values of 2000 year under the four RCPs. (This figure was adapted from
Zhu and Liao (2016) with permission by Elsevier)
7 Contribution of Atmospheric Reactive Nitrogen to Ozone Pollution in China
145