Fruit acidity and sweetness are two major factors
that determine eating taste and quality of pineapple fruits.
Wax treatment decreased significantly TA content of
fruits, while it increased soluble sugars content after cold
storage. This observation is similar to that reported by
Sun et al. who observed that litchi fruits treated
with chitosan coating tend to maintain significantly higher
levels of sugars compared with the control fruits.
Meanwhile, Eum et al. reported that the coatings
of plum fruits slowed the TA changes. Together, these
observations indicated that wax treatment not only could
alleviate chilling injury, but also improve quality of
pineapple in cold storage.