Antioxidant activities in stored fruit, and in flowers of feijoa (Acca sellowiana Berg) in a tropical highland of Mexico

Feijoa is a new fruit crop in Mexico established in the tropical highlands. Total phenols and antioxidant capacity were determined for feijoa fruit in postharvest at 4 and 25°C for 24 d, and at 10°C for 44 d. The total phenolic content in pulp extracts was between 71 and 260 mg GAE 100 g^‑1 FW. Antioxidant activity in the extracts of the feijoa pulp was 2.93 μm eq. Trolox g^‑1 FW at harvest. Extracts of the pulp of fruit stored at 4°C for 24 d had higher bioactive compounds than extracts of pulp of feijoa fruit stored at 25°C for 24 d. At 10°C, the total phenols and total flavonoids did not decrease significantly over 39 d. In the flower stamens, total phenols were 134.4 mg GAE g^‑1 DW, and in the petals 19.0 mg GAE 100 g^‑1 DW. The feijoa fruit and flower are an option to increase the human local consumption of bioactive compounds in tropical highlands.