Supplementary Figures
Figure S1 : Example PTR-MS calibration to a primary MeOH and AA gas phase standard
Figures S2-S5 : Biological replicates #2-5 of real-time branch gas exchange dynamics of VOCs, CO2, and H2O during a drought experiment of potted poplar trees
Figure S6 : Recovery of drought-suppressed branch MeOH emissions by 100 mL soil moisture additions prior, during, and after the onset of aerobic fermentation during drought
Figure S7 : Emissions of methanol (MeOH) and acetic acid (AA) as a function of temperature from a detached poplar stem segment in a dark temperature-controlled chamber
Figure S8 : Leaf 13C2-acetic acid emissions during branch13C2-acetate labeling via the transpiration stream