Effects of bio‐based coatings on the ripening and quality attributes of tomato (Solanum lycopersicum) fruits

Abstract

BACKGROUND Postharvest conservation of tomatoes is a major current challenge for growers and traders. Edible coatings constitute a pertinent alternative to existing conservation methods. RESULTS Control tomatoes were fully ripe 3 days after harvesting, whereas fruits dipped in solutions containing extracts from cocoa pods (T1), cocoa leaves (T2) or coffee hulls (T3) reached full ripeness 14 days after treatment (DAT). Fruits treated by dipping in a solution containing an extract from coffee leaves (T4) were fully ripe 21 DAT. The visual assessment was confirmed by alterations in the level of chlorophyll a. Treatments induced a significant inhibition of chlorophyll a breakdown, especially during the first week after their application, T4 being the most efficacious. Weight loss increased significantly throughout the experimental period and was accelerated by treatments. Some quality‐related parameters of ripe tomato fruits were in most cases not significantly influenced by treatments. In a few cases, however, there were improvements in quality traits of ripe fruits. On 21 DAT, T4 induced significant increases in levels of β‐carotene and 6‐methyl‐3,5‐heptadien‐2‐ol, whereas T2 led, especially, to higher levels of volatile compounds. CONCLUSION Edible coatings based on extracts from coffee or cocoa leaves induced improvements in the shelf life and quality of tomato fruits. © 2018 Society of Chemical Industry

Changes in the Ripening Characteristics and Shelf Life of Mango Fruits as Related to the Application of Coating Based on Cocoa Leaf Extracts

“…Since β-carotene is a nutritional quality trait, treatments of mango fruits by coating with solutions containing cocoa leaf extracts led to an improvement of the nutritional value of these fruits and thus to their "biofortification". Enhancements of β-carotene and volatile compounds contents in tomato fruits after applications of coatings based respectively on coffee leaf extracts and cocoa leaf extracts have also previously been reported by Aghofack-Nguemezi, et al [35].…”

Multielemental analyses of Lonomia obliqua (Lepidoptera, Saturniidae) caterpillar using EDXRF and INAA techniques

“…These fertilizers can have high levels of calcium (CaSiO 3 and CaO). [17] They have a number of beneficial effects for the plant-soil system. In the plant, it assists in the protection (resistance) to pests (the caterpillars feed on the leaves of the host plant), without causing alteration in plant genome, but can cause damages in the pests (caterpillars).…”

Effects of Calcium Chloride Treatment on the Photosynthetic Capacity and Intensity of Banana Fruit during Ripening

“…Thus, contrary to chlorophyll a, chlorophyll b cannot be a considered as bioindicator of photosynthetic activity. It has been reported by Aghofack-Nguemezi and Yambou [13] and Aghofack-Nguemezi et al [18] that Alterations in chlorophyll b content were not tightly linked to the visual assessment of fruit ripening and ripeningretarding effects of some treatments. These authors postulated that chlorophyll a is a more appropriate biomarker for fruit ripening and related processes than chlorophyll b.…”