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.