PP-HO: PP trays filled with high O2 (38–40%); PP-LO: PP trays filled with low O2 (10–12%); PP-AIR: PP trays filled with air; and PP-ALG: PP trays filled with air and containing fresh-cut pineapple coated with alginate. Data shown are mean ± standard deviation. Different superscript letters indicate statistically significant differences (p < 0.05).