Shade-adapted plant leaves are generally more sensitive to UVB
light stress than sun-adapted leaves (Krause et al., 1999; Krause
et al., 2003). As evidence of climatic adaptation, the photosystems
of shaded ‘Granny Smith’ and ‘Fuji’ fruits were damaged by UV-B
treatment, while that of ‘Cripps’ Pink’ fruits remained as insensitive
as that of sun exposed fruits of all three cultivars