fluorescence (Fm) had variable responses to UV-B stress (Figs. 1–4,
respectively). ‘Granny Smith’ peel showed an increase in Fv/Fm and
Fv atthe juvenile and mature stages, while their Fo only increased at
the juvenile stage in response to UV-B. Fv/Fm increased in ‘Braeburn’
and ‘Cripps’ Pink’ peel at the mature stage. There was no change in
the Fv/Fm, Fo and Fv values in response to UV-B in ‘Fuji’, ‘Golden
Delicious’, and ‘Topred’ throughout the season. The Fm generally
remained constant throughout the season in all cultivars, accept
for an increase at the juvenile and mature stages in ‘Granny Smith’
(Fig. 4). The initial Fv/Fm decreased through the season in ‘Granny
Smith’, ‘Fuji’ and ‘Cripps’ Pink’ fruits. The results were inversed for
‘Topred’ fruits, while it decreased and then increased in ‘Golden
Delicious’ and ‘Braeburn’ fruits.
fluorescence (Fm) had variable responses to UV-B stress (Figs. 1–4,
respectively). ‘Granny Smith’ peel showed an increase in Fv/Fm and
Fv atthe juvenile and mature stages, while their Fo only increased at
the juvenile stage in response to UV-B. Fv/Fm increased in ‘Braeburn’
and ‘Cripps’ Pink’ peel at the mature stage. There was no change in
the Fv/Fm, Fo and Fv values in response to UV-B in ‘Fuji’, ‘Golden
Delicious’, and ‘Topred’ throughout the season. The Fm generally
remained constant throughout the season in all cultivars, accept
for an increase at the juvenile and mature stages in ‘Granny Smith’
(Fig. 4). The initial Fv/Fm decreased through the season in ‘Granny
Smith’, ‘Fuji’ and ‘Cripps’ Pink’ fruits. The results were inversed for
‘Topred’ fruits, while it decreased and then increased in ‘Golden
Delicious’ and ‘Braeburn’ fruits.
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