3. Results
3.1. Photosynthetic rate
The ANOVA demonstrated that the irrigation regime, cultivar and measurement date
effects were all significant (Table 2). The photosynthetic rate was significantly decreased
by the moderate water deficit (50% of ETM, Fig. 1). The decrease, averaged over all
measurements, was equivalent to 13% of the fully irrigated control in both plantings (9.8 mmol versus 11.2 mmol CO2 m2 s1 in the first and 12.2 mmol versus 14.0 mmol
CO2 m2 s1 in the second planting).