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      Extension of umbu (Spondias tuberosa Arruda) postharvest life using a cassava starch-based coating Translated title: Prolongación de la vida poscosecha del umbú (Spondias tuberosa Arruda) mediante recubrimiento a base de almidón de yuca

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          Abstract

          ABSTRACT The umbu (Spondias tuberosa Arruda) is a fruit tree adapted to the Brazilian semiarid region and constitutes an important source of income for many families in Brazil. Due to this, sustainable methods of fruit postharvest conservation should be studied. The objective of this study was to analyze the influence of cassava starch-based biofilm coatings for the postharvest conservation of umbu. The experimental design was completely randomized in a 2x5 factorial arrangement with six replicates. The two treatments, 1% cassava starch coating and no coating, were evaluated during five periods (0, 3, 6, 9, and 12 d of storage). Fresh weight loss (WL), fruit firmness (FIR), pH, total soluble solids (TSS), total titratable acidity (TA), TSS/ TA ratio, external color: luminosity (L*), hue angle (H*), and chromaticity (C*) were measured. The coating of fruits with cassava starch-based biofilm improved WL, pH, and TSS. The variables TA, TSS/TA ratio, and L* were not influenced by the use or absence of the cassava starch biofilm coating. The use of 1% cassava starch to coat the fruits ensures better postharvest quality of the umbu and extends its postharvest life.

          Translated abstract

          RESUMEN El umbú (Spondias tuberosa Arruda) es un árbol frutal adaptado a la región semiárida brasileña y constituye una fuente de ingresos importante para muchas familias en Brasil. Debido a esto, se deben estudiar métodos sostenibles de conservación de la fruta después de la cosecha. El objetivo de este estudio fue analizar la influencia de la biopelícula de almidón de yuca para la conservación poscosecha del umbú. El diseño experimental fue completamente al azar en un arreglo factorial 2x5 con seis repeticiones. Los dos tratamientos, recubrimiento de almidón de yuca al 1% y sin recubrimiento, se evaluaron durante cinco períodos (0, 3, 6, 9 y 12 d de almacenamiento). Se midieron la pérdida de peso fresco (PPF), la firmeza de la fruta (FIR), el pH, los sólidos solubles totales (SST), la acidez total titulable (AT), la relación SST/AT, el color: la luminosidad (L*), el ángulo de tonalidad (T*) y la cromaticidad (C*). El recubrimiento de los frutos con la biopelícula a base de almidón de yuca mejoró el PPF, el pH y los SST. La AT, la relación SST/AT y la L* no fueron influenciadas por el uso o ausencia del recubrimiento. El uso de almidón de yuca al 1% asegura una mejor calidad poscosecha del umbú y prolonga su vida poscosecha.

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          Sisvar: a Guide for its Bootstrap procedures in multiple comparisons

          Sisvar is a statistical analysis system with a large usage by the scientific community to produce statistical analyses and to produce scientific results and conclusions. The large use of the statistical procedures of Sisvar by the scientific community is due to it being accurate, precise, simple and robust. With many options of analysis, Sisvar has a not so largely used analysis that is the multiple comparison procedures using bootstrap approaches. This paper aims to review this subject and to show some advantages of using Sisvar to perform such analysis to compare treatments means. Tests like Dunnett, Tukey, Student-Newman-Keuls and Scott-Knott are performed alternatively by bootstrap methods and show greater power and better controls of experimentwise type I error rates under non-normal, asymmetric, platykurtic or leptokurtic distributions.
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            Chitosan application for active bio-based films production and potential in the food industry: Review

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              Extension of postharvest shelf life of strawberries (Fragaria ananassa) using a coating of chitosan-whey protein isolate conjugate.

              Chitosan and whey protein isolate (WPI) conjugate films were prepared as a novel matrix for encapsulating and extending the postharvest shelf life of strawberries. Film forming solutions of chitosan, WPI, and chitosan-WPI conjugate were mixed with glycerol, casted for films at 60 ± 2 °C and assessed for their colour, water vapour and oxygen transfer rate, textural, functional groups and secondary structure, thermal, crystallinity, and antioxidant properties. Chitosan-WPI conjugate films were applied as an edible coating on strawberries, and studied for storage stability at 5 °C and 20 °C by assessing physical and biochemical parameters. A considerable reduction in colour indices, weight loss, pH and titratable acidity, reducing sugars, ascorbic acid, total phenolics, DPPH and ABTS assay was noted in the coated strawberries over the control at both the studied temperatures. The control strawberries had a shelf life of 5 and 3 days, whereas coating enhanced the shelf life of strawberries to 8 and 5 days when stored at 5 °C and 20 °C, respectively.
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                Author and article information

                Journal
                agc
                Agronomía Colombiana
                Agron. colomb.
                Universidad Nacional de Colombia, Facultad de Agronomía (Bogotá, Distrito Capital, Colombia )
                0120-9965
                August 2021
                : 39
                : 2
                : 293-299
                Affiliations
                [4] Texas orgnameTexas A&M University orgdiv1Department of Horticulture USA
                [5] Capão do Leão Rio Grande do Sul orgnameUniversidade Federal de Pelotas Brazil
                [3] Janaúba Minas Gerais orgnameUniversidade Estadual de Montes Claros orgdiv1Department of Agricultural Science Brazil
                [1] Viçosa Minas Gerais orgnameUniversidade Federal de Viçosa orgdiv1Department of Agronomy Brazil
                [2] Campos dos Goytacaze Rio de Janeiro orgnameUniversidade Estadual do Norte Fluminense orgdiv1Department of Genetics and Plant Breeding Brazil
                Article
                S0120-99652021000200293 S0120-9965(21)03900200293
                10.15446/agron.colomb.v39n2.94028
                1d82886c-06f2-4583-a76a-7e86e7f150bd

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 01 March 2021
                : 25 August 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 26, Pages: 7
                Product

                SciELO Colombia

                Categories
                Food science and technology

                conservation,biofilm,sostenibilidad,conservación,biopelícula,sustainability

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