Initially, no significant changes in fruits weight loss (%)
were observed in control fruits and melatonin-treated fruits.
However, as ripening proceeded, the weight loss significantly
(P<0.5) increased by 8.3% and 9.7% at 17 DAT and 24 DAT,
respectively, in melatonin-treated fruits (Fig. 4A).
Furthermore, we analysed the effect of melatonin treatment
on the expression of five aquaporin genes, which
are considered to be factors that influence water loss, in
tomato fruits at 17 DAT. Our results indicate that, compared
with CK, SlPIP12, SlPIP21 and SlPIP22 expression
levels had a 2-fold increase, and SlPIPQ had a 3-fold
increase in M50-fruits, whereas Sl4SQ did not change significantly
(Fig. 4B). These results suggest that melatonin
may affect water loss in fruit by altering the expression of
some aquaporin genes.
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