Coatings based on carboximethyl cellulose and dextrin in 'Tommy Atkins' mango fruit stored under refrigeration/ Recobrimentos a base de carboximetilcelulose e dextrina em mangas 'Tommy Atkins' armazenada sob refrigeracao

• Published in: Ciência rural Vol. 40; no. 10; p. 2199
• Main Authors: Amariz, Andreia, de Lima, Maria Auxiliadora Coelho, da Trindade, Danielly Cristina Gomes, dos Santos, Ana Cristina Nascimento, Ribeiro, Thalita Passos
• Format: Journal Article
• Language: Spanish
• Published: Universidade Federal de Santa Maria 01.10.2010
• Subjects: Cellulose; Coatings; Manga literature
• ISSN: 0103-8478

It was aimed to evaluate the efficiency of coatings based on carboximethyl cellulose (CMC) and dextrin applied in 'Tommy Atkins' mango fruit stored for zero, ten and 20 days under refrigeration (12.4 ± 3.1°C and 72 ± 12% RH) and, after this period, submitted to ambient conditions (20.3 ± 3.0°C and 40 ± 7% RH) for three, six, eight and nine days. The CMC 1.0% + dextrin 0.2%, CMC 0.8% + dextrin 0.5%o and CMC 0.5% + dextrin 1.0% coatings were compared to the control. The experimental design was completely randomized in factorial 4x7 (coating x storage time), with four replicates constituted by three fruits. The application of CMC 1.0% + dextrin 0.2% or CMC 0.8% + dextrin 0.5% delayed the soluble solids accumulation, the titratable acidity reduction and the skin color evolution, increasing fruit brightness that ensured a better appearance. The responses indicate a delay on maturation that was more evident on CMC 0.8% + dextrin 0.5% treatment. Key words: Mangifera indica, modified atmosphere, postharvest, edible coatings, quality. Objetivou-se avaliar a eficiencia de recobrimentos a base de carboximetilcelulose (CMC) e dextrina em manga 'Tommy Atkins' armazenada durante zero, dez e 20 dias sob refrigeracao (12,4 ± 3,1°C e 72 ± 12% UR) e, posteriormente, submetida as condicoes de ambiente (20,3 ± 3,0°C e 40 ± 7% UR) por tres, seis, oito e nove dias. Os recobrimentos CMC 1,0% + dextrina 0,2%, CMC 0,8% + dextrina 0,5% e CMC 0,5%+dextrina 1,0% foram comparados ao controle. O delineamento experimental foi inteiramente casualizado, em fatorial 4x7 (recobrimento x tempo de armazenamento), com quatro repeticoes compostas por tres frutos. A aplicacao de CMC 1,0% + dextrina 0,2% ou CMC 0,8% + dextrina 0,5% retardou o acumulo de solidos soluveis, a reducao da acidez titulavel e a evolucao da cor da casca, com incremento no brilho superficial dos frutos, o que garantiu melhor aparencia. Os efeitos indicam atraso da maturacao, sendo mais evidentes no tratamento CMC 0,8% + dextrina 0,5%. Palavras-chave: Mangifera indica, atmosfera modificada, poscolheita, peliculas comestiveis, qualidade.