Light absorption by thylakoid bound pigments (TBP) decreased
in ‘Granny Smith’, ‘Golden Delicious’, ‘Topred’ and to a lesser
extent in ‘Braeburn’ (Figs. 5 and 6). However, TBP light absorption
increased in ‘Granny Smith’ and ‘Braeburn’ at mid-season and
maturity, respectively. However, in ‘Fuji’ and ‘Cripps’ Pink’, TBP
light absorption increased at maturity in response to UV-B treatment.