Figure 3.

Twenty-four-hour net CO₂ exchange by shoots or cladodes of three species of CAM plants. A, Aloe vera: 28°C, 193 μmol m⁻² s⁻¹ light/22°C dark, dew point 15°C; B, H. monocanthus: 28°C, 350 μmol m⁻² s⁻¹ light/22°C dark, dew point 20°C; and C, Vanilla pauciflora: 30°C, 304 μmol m⁻² s⁻¹ light/22°C dark, dew point 20°C. A through C depict net CO₂ exchange during the final 24 h of experiments that lasted between 18 and 51 12-h-light/12-h-dark cycles.