Alginate Edible Coating and Cold Storage for Improving the Physicochemical Quality of Cape Gooseberry (Physalis Peruviana L.)

Abstract

The Cape gooseberry is an exotic tropical fruit and, nowadays, is the second most exported fruit from Colombia. Therefore, the high demand for quality required research for a better understanding of fruit behavior. Furthermore, postharvest quality properties play an important role in meeting consumer demands. Cold storage and edible coatings are reported as efficient technologies for extending shelf life and preserve the quality of fruits in postharvest. As there are no reports of studies about the effect of these technologies on shelf life, quality and antioxidant activity in Cape gooseberry, this work aim to evaluate the use of alginate 1% during 21 days of storage at 2ºC as an alternative for postharvest handling of this fruit. Cape gooseberry exhibits a high respiration rate and ethylene production at 20ºC. Alginate coat decreased significantly the metabolism activity of fruit during the cold storage without change significantly the fruit organoleptic quality and showing total phenolic, carotenoid contents and antioxidant activity. Alginate is an efficient edible coat for preserve the quality and bioactivity of Cape gooseberry during 21 days of storage at 2ºC.Keywords: Alginate; Antioxidant activity; Physalis peruviana; Phytochemicals; Postharvest; Quality Citation: Carvalho CP, Villaño D, Moreno DA, Serrano M, Valero D (2015) Alginate Edible Coating and Cold Storage for Improving the Physicochemical Quality of Cape Gooseberry (Physalis Peruviana L.). J Food Sci Nutr 1: 002.• on the quality and antioxidant activity of Cape gooseberry during cold storage. Materials and Methods Plant material and edible coatingCape gooseberry (Physalis peruviana L.) fruit with the calyx, Colombian ecotype, was imported from Colombia to Spain by Verdefresh. The experimental work was done in Spain at the Department of Food Technology of Miguel Hernández University and at the Department of Food Science and Technology, Department of Edaphology and Applied Biology Center of Segura (CEBAS-CSIC) in the framework of collaboration between research groups of the CYTED thematic network 112rt0460 CORNUCOPIA.Once at laboratory, 21 homogeneous lots (based on color and size) of ten fruits each were performed at random. Three lots were used to determine the fruit properties at harvest (day 0) and the 18 remaining were split into two groups for the following treatments in triplicate: 0% (control) and 1% (w/v) alginate coating.

Assessment of Chitosan-Rue (Ruta graveolens L.) Essential Oil-Based Coatings on Refrigerated Cape Gooseberry (Physalis peruviana L.) Quality

“…Figure 3 shows an ascent of this parameter from day 0 to day 12 in all treatments and control, indicating that during the days evaluated the effect of chlorophyll degradation affects the red/green coordinates (a *) and the yellow/blue coordinates (b *) intensifying their value. These results depend on the postharvest characteristics, and the state of maturity (3-4) due to this it is expected that the color index and the evolution of the carotenoid content are high in this phase [6].…”

“…The color of the epidermis fruit is a benchmark of the maturity index [6]. This is due to the chlorophyll degradation starting with the phytol dissociation residue and the porphyrin ring of the chlorophyll molecule.…”

“…In 2009, the primary consumers of Colombian cape gooseberries were The Netherlands (3200 tons), Germany (1600 tons), Belgium (966 tons), Sweden (214 tons), and France (130 tons). However, Colombia only exported 18.4 tons to the United States as a result of the demanding quarantine cold treatment, where edible coatings to preserve fruits and increase the storage stability under refrigerated conditions could be very useful [6]. Usually, for distribution to the world markets, cape gooseberries are packed in plastic or wood boxes with a capacity of 8 kg for fruit with a calyx and 10 kg without a calyx, which means that the present treatment will favor more fruit per box, avoiding a higher plastic consumption around the world [7].…”

“…Carvalho et al [6] investigate the effect of alginate coating and cold storage on the bioactive compounds present in cape gooseberries [6]. Licodiedoff et al [20] studied the effect of apply gelatin-calcium chloride on cape gooseberry without Calyx, which provided a reduction of weight loss and fungal deterioration [20].…”

Efecto del almacenamiento sobre uchuva adicionada con componentes fisiológicamente activos y deshidratada por aire caliente

“…Se le atribuyen propiedades medicinales y se destaca por su alto nivel en ácido ascórbico, además de ß-caroteno, Fe, Ca, entre otros (Olivares-Tenorio et al 2017). Este fruto ha sido identificado como fruto exótico entre una serie de productos con potencial agroindustrial, por sus características fisicoquímicas (Carvalho et al 2015), propiedades nutricionales (Olivares-Tenorio et al 2017) y medicinales (Rabie et al 2015), adquiriendo gran importancia por su constante demanda en los mercados europeos y norteamericanos.…”