Effects of polysaccharide-based coatings on postharvest storage life of grape: measuring the changes in nutritional, antioxidant and phenolic compounds

Abstract

In this study, the effect of postharvest coating of chitosan (CH) 1.0%, gum ghatti (GG) 1.0% and combine of each other, on nutritional properties, phenolic compounds and antioxidant capacity of ‘Rishbaba’ grape ( Vitis vinifera L.) was evaluated during 60 days of cold storage. Coating with 1.0% CH solely or in combined with 1.0% GG caused a considerable retain in grape berries phenolic acids compared to uncounted samples after the 60th day. Moreover, flavanols and flavan-3-ols content were found to be highest in fruits treated with CH and GG complex. At the end of storage, the highest concentrations of delphinidin, cyanidin, pelargonidin and malvidin were found in grapes coated with CH in combined with GG. The highest antioxidant capacity and the lowest polyphenol oxidase activity were related to samples treated with CH and GG complex. Also, the combination effects of CH and GG at 1.0% were the most efficient for soluble sugars and polyamines accumulation. The CH + GG complex had the best result on prohibiting grape fungal decay. The results showed a research increase of this complex that these are a strong potential strategy to produce coatings for improving the postharvest quality of fruits and could be considered as a good solution to preserve many components of them.

Hydrocolloid edible coatings extend shelf life, reduce postharvest decay, and maintain keeping quality of mango fruits ( Mangifera indica L.) under ambient storage

“…Our results corroborate the findings of Baraiya et al (2016) who recommended the application of xanthan gum edible coating to improve the consumer preference of table grapes. In a similar finding, Eshghi et al (2022) also reported that the polysaccharide and "gum ghatti" edible coating improved the overall fruit quality of grapes.…”

“…Control Gum Arabic (10%) Guar gum (1.5%) CMC (1%) Xanthan gum (0.3%) polysaccharide ability for retaining the nutritional components of fruit (Eshghi et al, 2022).…”

“…(Khalil et al, 2022; Prasad et al, 2016). However, postharvest horticulturists are more interested in technologies, which are not only eco‐safe and health friendly but also cost effective (Eshghi, Karimi, Shiri, Karami, & Moradi, 2022; Prasad et al, 2018). Among the latest approaches, the use of novel eco and health friendly edible coatings is gaining popularity as it lowers the dependency on chemical fungicides, which not only affect human health but also contribute to pathogen resistance (Blancas‐Benitez et al, 2022; Kawhena, Opara, & Fawole, 2022).…”

“…Hydrocolloid (HC) edible coatings is an important group of food additive that exhibit a three‐way action (physiological, physical and pathological) on overall fruit quality and its storage life (Kumar et al, 2021; Saleem et al, 2020). In recent years, HCs coatings are finding increasing applications in the fruit preservation industry due to its properties such as eco and health‐friendly characteristic (Ali et al, 2016; Eshghi et al, 2022), FDA approved (Singh and Packirisamy, 2022) and “Generally Recognized as Safe” nature (Blancas‐Benitez et al, 2022). Its postharvest application bears vast potential in tropical fruit industry (Felicia et al, 2022; Salehi, 2020).…”

Chitosan-Based Edible Coatings Containing Essential Oils to Preserve the Shelf Life and Postharvest Quality Parameters of Organic Strawberries and Apples during Cold Storage

“…Sample preparation for mold and yeast counts was achieved in aseptic conditions (laminar flow, gloves, and scalpels), for each replicate, based on the method described by Jafari et al (2021) [ 68 ] and Eshghi et al (2022) [ 69 ]. Briefly, 10 g of sample was mixed with 90 mL of sterilized distilled water in 100 mL Erlenmeyer flask.…”