Table 2.
The effect of shading and drought on the light compensation point (Icomp), light saturation point (Imax), and apparent quantum yield (Φ) of the four study species. These parameters were obtained by measuring the response of net CO2 assimilation (An) to varying light intensities. Means (±SE) include 16 replicates per treatment, and means not connected by the same letter are significantly different (Tukey HSD, p<0.05).
| Treatment | Icomp (μmol photons m−2 s−1) | Imax (μmol photons m−2 s−1) | Φ (μmol CO2 μmol−1 photons) |
|---|---|---|---|
|
| |||
| Control | 42.3±3.2 a | 856±114 a | 0.041±0.004 a |
| Drought | 38.4±1.6 a | 669±82 b | 0.038±0.004 a |
| Shade | 29.1±1.6 b | 768±112 a,b | 0.042±0.004 a |
| Shade + Drought | 29.2±1.1 b | 691±88 a,b | 0.042±0.003 a |