Color of mango skins is an important selection criterion for
buyers. It can give an indication of the state of fruit ripening. As
shown in Fig 2, noticeable changes in the skin color occurred
during storage. Uncoated mangoes lost their green color (a* > 0)
unlike coated fruit that maintained this color (a* < 0). Chitosan
concentration at 1.5% seemed the best to maintain green color.
The presence of LPOS did not influence color change, and thus the
action of the coating in slowing ripening was correlated with
the concentration of chitosan and was not dependent on the
presence of the LPOS.