Fig. 5.

Average (+SE) emission rates of key monoterpenes (A–F) from mature leaves of 10- to 12-week-old N. tabacum ‘Wisconsin’ at 0.5, 3, 10, 24, and 48 h of recovery after ozone exposure at 0, 400, 600, 800, and 1000 ppb for 30 min in a custom-made cylindrical double-walled glass chamber at 25 °C. Individual effects of ozone, recovery time (Time), and their interactions on emission rates were tested by GLM with maximum likelihood model fitting. Wald’s chi-square (χ²) test statistics and statistical significance are indicated as *P<0.05. (This figure is available in color at JXB online.)