Figure 3
From: Effective use of high CO2 efflux at the soil surface in a tropical understory plant
Photosynthetic responses under high CO2 concentrations and high light conditions.
(a) Photosynthetic light response curves (PPF-A curves) at 600 µmol mol−1 CO2 (closed circles) and 400 µmol mol−1 CO2 (open circles), where PPF represents the photosynthetic photon flux at the leaf surface and A is net C assimilation rate. Bars indicate 1 SD, (b) Photosynthetic ambient-air CO2 response curves (Ca-A curves) in a leaf blade at 500 µmol m−2 s−1 PPF (closed circles) and 40 µmol m−2 s−1 PPF (open circles), where Ca represents CO2 concentration in outlet gas stream in the LI-6400, i.e., ambient air CO2 concentration.
