Quality of Physalis peruviana fruits coated with pectin and pectin reinforced with nanocellulose from P. peruviana calyces

Abstract

Physalis peruviana is marketed without its calyx, which generates byproducts and a decrease in the shelf life of these fruits. The aim of this study was to evaluate the effect of edible pectin-coatings reinforced with nanocellulose from calyx on the physical-chemical and physiological parameters of P. peruviana fruits during refrigerated storage (5 C) for ten days. The nanocellulose extraction was carried out using a combined extraction method (chemical procedures and ultrasound radiation). The characterization of the fibers showed that the maximum degradation temperatures ranged between 300 and 311 C. The SEM analysis revealed the presence of fibers after the chemical treatment. The removal of lignin and hemicellulose was validated using Fourier Transform Infra Red (FTIR) spectroscopy. The results showed that the fruits treated with pectin and pectin reinforced with nanocellulose at 0.5 % (w/w) had an adequate visual appearance and showed a minor color change (ΔE of 19.04 and 21.04, respectively) and the highest retention of L* during storage. Although the addition of nanocellulose at 0.5% presented the lowest respiratory rate (29.60 mgCO 2 /kg h), the treatment with pectin offered the least weight loss and showed the highest firmness retention at the end of storage. Thus, the edible pectin-coating may be useful for improving the postharvest quality and storage life of fresh P. peruviana fruit. Nanocellulose from P. peruviana calyces can be used under the concept of a circular economy; although, its use as a reinforcement of pectin showed some limitations.

Assessing the Role of Gaseous Chlorine Dioxide in Modulating the Postharvest Ripening of Keitt Mangoes through the Induction of Ethylene Biosynthesis

“…The ethylene release rate was calculated as the average of the last 10 min of ethylene production in nmol C 2 H 4 kg −1 s −1 . The respiration rate was measured by titrating the CO 2 produced by mangoes and absorbed in the 0.4 mol/L NaOH with 0.3 mol/L H 2 C 2 O 4 [32]. The respiration rate was expressed as mg CO 2 kg −1 h −1 .…”

Extraction and characterisation of cuticular waxes from Physalis peruviana calyx

“…However, in Colombia, for example, 40% of fresh goldenberry crops that are not exported are transformed into dried fruit, jams, syrups, and so on, separating the calyx from the fruit. The Physalis peruviana calyx (PPC) is an inedible by‐product and represents 5–10% of the weight of the fresh fruit (Cardenas‐Barboza et al ., 2021). Generation of PPC also amounts to approximately 33 tons of waste generated per hectare of cultivated goldenberry (Ramadan, 2011), which means that, for example, in 2019 Colombia produced approximately 18 414 tons of chalices (Ministerio de Agricultura y Desarrollo Rural, 2019).…”

Effect of Processing Methods on the Postharvest Quality of Cape Gooseberry (Physalis peruviana L.)

“…The cape gooseberry (Physalis peruviana Linnaeus) is a fruit belonging to the Solanaceae family and genus Physalis. This plant is native to the South American Andes and produces juicy, yellow-orange berry-like fruit with a diameter between 1.25 and 2.50 cm and weight between 4 and 10 g, depending on the harvesting conditions [1]. It is a climacteric fruit characterized by a bittersweet and fresh flavor, pleasant texture, and aroma [2,3], and it has a high nutritional value due to the notable presence of compounds such as vitamins (ascorbic acid, thiamine, riboflavin, and niacin) and minerals (calcium, phosphorus, and iron) [4].…”