This
increase in acidity during fruit ripening may be related to the
unfolding of the starch into sugars, and its conversion to pyruvic
acid, caused by respiration of fruits. Part of this organic acid may
be oxidized in the Krebs cycle and the remainder stored in the
cytosol, representing high amount of organic acids in fruits
(Chitarra & Chitarra, 2005; Taiz & Zeiger, 2013). For the pH, there
was a reduction in the ripe fruit, according to the results found
for acidity, since there is an increase in acidity when the pH is
reduced.