4. Discussion
External and internal fruit quality is dependent on both the
light environment (e.g. PAR intensity, UV amount and zenithal
angle) and the canopy (e.g. tree orientation, row spacing and threedimensional
arrangement of the leaf area) (Palmer, 1999; Wünsche
et al., 2001). Tropical and sub-tropical regions experience higher
levels of UV-B radiation than temperate zones at higher latitudes,