Postharvest Quality of Tommy Atkins Mangoes Coated With Cassava Starch and Chitosan-Based Coatings

T A Oliveira,A C Silva,E M M Aroucha,C A Paiva,R H L Leite,L V Nascimento

doi:10.5539/jas.v10n11p401

T A Oliveira, A C Silva + Show 4 more

Open Access

https://doi.org/10.5539/jas.v10n11p401

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Abstract

This study aimed to evaluate postharvest quality of Tommy Atkins mangoes treated with starch cassava and chitosan based coatings. Mango fruits were collected at physiological maturity. After cleaning, weighing and identification, fruits were submitted to the respective treatments and stored for 35 days in the Laborat&oacute;rio de Tecnologia de Alimentos, with weekly evaluations under refrigeration 13&plusmn;1 &ordm;C and 90&plusmn;5% RH. The experiment was conducted in a completely randomized design, in factorial scheme with four treatments: control, cassava starch (CS), chitosan (CH), and cassava starch/chitosan (CS/CH) at a concentration of 2%, and six storage periods (0, 7, 14, 21, 28 and 35 days) with four replications. Fruits were evaluated in: appearance, weight loss, external color: luminosity and &Delta;E, pulp firmness, titratable acidity, soluble solids content, starch, total soluble sugars, reducing sugars and sucrose. Data were submitted to analysis of variance using SISVAR software and compared by Scott-Knott test at 5% of probability. It was observed a reduction in appearance, pulp firmness, titratable acidity, starch and reducing sugars and increase in weight loss, luminosity, &Delta;E, soluble solids, total soluble sugars and non-reducing sugars during storage. CS/CH coated fruits reported higher notes of appearance, lower weight loss and maintained color. Quality of physicochemical attributes: soluble solids, starch, total soluble sugars, reducing sugars and non-reducing sugars were strongly retarded.

Highlights

Mango (Mangifera indica L.) is one of the most important tropical fruits, appreciated for its taste, aroma, and its typical and attractive colors
Due to the importance of mangoes in agribusiness and its perishable nature, the objective of this study is to evaluate postharvest of Tommy Atkins mangoes using cassava starch and chitosan-based coatings
We verified that the storage of fruits coated with chitosan and cassava starch/chitosan (CS/CH) were more promising on maintaining external appearance for longer periods when compared to uncoated and fruits coated only with cassava starch

Summary

Introduction

Mango (Mangifera indica L.) is one of the most important tropical fruits, appreciated for its taste, aroma, and its typical and attractive colors. World production of mango in 2014 reached over 45 millions of tons, with India as the largest producer holding 40% out of the total. Other important producers of mango worldwide are China (10%), Thailand (8%), Indonesia (5%), Mexico (4%), Pakistan (4%), and Brazil (3%) (FAO, 2017). Brazil exports 9% of what it is produced, with Europe being its biggest importer (Gallo, 2015; FAO, 2017). Tommy Atkins is the main commercial cultivar exported from Brazil, which has good productivity and capacity to adapt itself to different growing environments, tolerance to diseases, and good postharvest conservation (Andrade et al, 2017). Refrigeration under 10 to 13 oC and 85% of RH guarantee mangoes’ quality for two to three weeks, depending on maturation stage (Neves, 2009) or refrigeration associated to carnauba wax and plastic packages, which maintain quality for 28 to 35 days, being both used to increase postharvest quality in mangoes fruits intended to exportation

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