Table II.

Recovery ratio for photosynthesis in response to heating to 46°C for two min

Compound	Recovery ratio
Isoprene (22 μL L−1)	1.13 ± 0.02, n = 4
Butadiene (22 μL L−1)	1.77 ± 0.19, n = 3
1-Butene (22 μL L−1)	1.19 ± 0.03, n = 3
cis 2-Butene (22 μL L−1)	1.32 ± 0.26, n = 3
Ethylene (22 μL L−1)	0.94 ± 0.40, n = 6
2-Methyl butane (7 μL L−1)	0.69 ± 0.07, n = 3
n-Butane (20 μL L−1)	0.82 ± 0.08, n = 3
Isobutane (20 μL L−1)	0.84 ± 0.10, n = 3

Photosynthesis was measured at 30°C and 1,000 μmol photons m⁻² s⁻¹. The recovery of photosynthesis of the treated leaf upon returning to 30°C was divided by the recovery of the adjacent leaflet used as a control. In this way each replicate is from adjacent leaf material, eliminating effects of leaf-to-leaf variability. The order of the experiment (control or treated measured first) was varied. Data are reported as mean ± se.