Desenvolvimento e aplicação de revestimentos à base de carboximetilcelulose, extrato de ora-pro-nobis (Pereskia aculeata Mill.) e ácido tânico na conservação pós-colheita de mamão
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Data
2025-08-01
Autores
Pereira, Alícia Martins
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Universidade Federal do Espírito Santo
Resumo
Brazil is the 3rd largest producer of fruits in the world and the 5th largest producer of papaya. Papaya is a climacteric fruit that presents high levels of losses in its production chain due to the biochemical transformations that occur in the post-harvest. Edible coatings are applied to the fruits to preserve their post-harvest life, such as carnauba wax and carboxymethylcellulose. In addition, enriching edible coatings with active ingredients such as plant extracts and tannic acid can improve their properties. Thus, the aim of this study was to evaluate the effects of different edible coatings based on carboxymethylcellulose, ora-pro-nóbis extract and tannic acid on the postharvest conservation of papaya. The design was completely randomized, in a factorial scheme, considering the factors coating (5 levels) and time (4 levels), totaling 20 treatments. The papayas were sanitized, covered with coatings and stored at 25°C for 8 days. The samples were collected on days 2, 4, 6 and 8 for analysis of Firmness, Mass Loss, Color, Ethylene Production, Respiratory Intensity, Incidence and Severity of Diseases, Ascorbic Acid and Carotenoid Content. The data were submitted to Analysis of Variance (α=5%), followed by Duncan's test for the coating factor and linear regression analysis for the time factor. The addition of ora-pro-nobis extract (REV1) helped to reduce the severity of diseases and preserve the color. Treatment with CMC, glycerin and grain alcohol (REV2) preserved firmness on the 2nd day. Treatment with CMC, glycerin, grain alcohol, and tannic acid (REV4) slowed respiratory intensity and ethylene production. Control coating (CE) reduced mass loss, preserved firmness, and slowed down skin color changes. It was concluded that the coatings REV1, REV2, REV4 and CE presented positive aspects in the preservation of the postharvest quality of papaya.
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Coberturas comestíveis , Compostos fenólicos , Frutas climatéricas