Figure 3.

Effects of ambient CO₂ concentration on the rates of steady-state isoprene emission in light and on the maximum dark-induced emission rate (A), the pool of DMADP corresponding to the steady-state isoprene emission rate and the dark pool corresponding to the dark-induced emission (B), and the quantum yield of PSII in light and in dark (C). In the case of quantum yield in the dark, the measurements were conducted 5 to 6 min after darkening, and the maximum fluorescence had not yet fully relaxed. Term definitions, experimental conditions, and the number of replicates are as in Figure 2.