Differently from A , g s showed a decreasing trend only in WW plants exposed to 550 ppb O 3 , although there was a globally significant O 3 effect across all treatments ( Figure 3 B).
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Combined Acute Ozone and Water Stress Alters the Quantitative Relationships between O<sub>3</sub> Uptake, Photosynthetic Characteristics and Volatile Emissions in <i>Brassica nigra</i>.
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