Effect of chitosan coating enriched with pequi (Caryocar brasiliense Camb.) peel extract on quality and safety of tomatoes (Lycopersicon esculentum Mill.) during storage

Autor(es)

Breda, Caroline Alves ^{[1, 2]} ; Morgado, Daniella Lury ^[3] ; Garrido de Assis, Odilio Benedito ^[3] ; Teixeira Duarte, Marta Cristina ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, UNICAMP, Sch Food Engn, Monteiro Lobato St 80, BR-13083862 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, UNICAMP, Microbiol Div, Res Ctr Chem Biol & Agr CPQBA, Alexandre Cazelatto St 999, BR-13148218 Paulinia, SP - Brazil

^[3] Embrapa Instrumentacao, 15 Novembro St 1452, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF FOOD PROCESSING AND PRESERVATION; v. 41, n. 6 DEC 2017.
• Citações Web of Science: 2

Resumo

The effects of chitosan based edible coating enriched with pequi peel extract (PPE) on quality and safety of tomatoes stored at 22 degrees C for 16 days were investigated. The addition of PPE into chitosan matrix reduced in 22% the weight loss and in 50% the total color variation. Concerning firmness and yeast and mold counts, similar improvements were observed for chitosan and chitosan-extract coatings, recording a delaying of the softening process in around 2 days and lowering in microbial counts to an estimated value of 1.5 x 10(3) CFU/g. The application of PPE alone showed effective in controlling fungal growth on tomatoes, by reducing in approximately 70% when compared to uncoated fruits. These results suggest that the combination of PPE with chitosan is suitable as an effective edible coating, improving fresh weight retention and reducing color change in tomatoes together with retaining the benefits of chitosan in delaying fungal growth. Practical applicationsFungal diseases are one of the most common causes of tomatoes losses, making necessary the use of fungicides. Pequi peel extract has antifungal activity against some fungal pathogens of tomatoes and can be incorporated into chitosan-based edible coatings in order to avoid the development of fungal diseases and maintain the parameters related to quality during postharvest storage. (AU)

• Processo FAPESP: 11/19057-7 - Atividade de extratos de folhas e resíduos de frutos do cerrado contra fungos fitopatogênicos de frutas
• Beneficiário: Caroline Alves Breda
• Modalidade de apoio: Bolsas no Brasil - Doutorado