Controlled experiment demonstrates that seasonal growth temperature shifts alter isoprene emission capacity in bur oak, indicating that current atmospheric models require modified algorithms.
Isoprene (2‐methyl‐1,3‐butadiene) emission from plants is highly temperature dependent. The influence of long‐term variations in growth temperature on isoprene emission rates from bur oak ( Quercus macrocarpa ) leaves was investigated under controlled environmental conditions. Trees were installed in a growth chamber and exposed to a series of daytime temperatures that were varied after a period of 3–6 weeks. Emission capacity (measured at leaf temperature of 25°C and photosynthetic photon flux density of 900 µmol m −2 s −1 ) doubled when growth temperature was increased from 25 to 30°C. Ten days after the growth temperature was decreased to 20°C, isoprene emission capacity fell to 25 to 50% of its peak value. When growth temperature was returned to 30°C, emission capacity doubled within 5 hours and continued to increase over several days. The observed behavior can be described by modifying existing algorithms.
No takes yet. Share an insight, caveat, or question.
Pétron et al. (2001) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: