Application of chitosan-based edible coating enriched with 24-epibrassinolide to maintain quality of late-harvested pomegranate fruit (‘Wonderful’)

S. Mwelase, O.A. Fawole
This study evaluated the efficacy of 24-epibrassinolide (EBR) infused onto chitosan in preserving the postharvest quality of late-harvest pomegranate (‘Wonderful’) fruit. Late-harvest pomegranate fruit were immersed in different surface treatment solutions of CH; 1.5% (w/v), CH + 2 µM EBR, CH + 5 µM EBR, CH + 10 µM EBR, CH + 15 µM EBR, and distilled water was used as a control treatment. The fruit were stored at 5°C with 85±5 RH for 3 months, and measurements were taken at 4-week intervals. At each sampling point, a batch of fruit was placed at 21±2°C and 65-70% RH for a further 4 d period to simulate retail conditions. Fruit weight loss, texture, respiration electrolyte leakage, antioxidant capacity and decay were investigated. The results showed that the CH-based EBR composite edible coating significantly (p<0.05) delayed the changes in weight loss, texture, respiration, electrolyte leakage and reduced spoilage compared to the control fruit. The treatment effect was more noticeable on fruit treated with CH + 10 µM EBR, which exhibited lower weight loss (18.19%), electrolyte leakage (27.54%), decay (12.5%), respiration rate (7.72 mL CO2 kg‑1 h‑1) and maintained higher texture (10.8 N) and DPPH (1.99 mM AAE mL‑1) compared to the untreated fruit with respective values of 24.32, 43.15, 37.5%, 18.06 mL CO2 kg‑1 h‑1, 17.03 °Brix, 0.81%, 8.32 N and 1.79 mM AAE mL‑1. Overall, the results of this study show that CH + 10 µM EBR treatment could be recommended to preserve the quality of late-harvested pomegranate fruit during storage.
Mwelase, S. and Fawole, O.A. (2022). Application of chitosan-based edible coating enriched with 24-epibrassinolide to maintain quality of late-harvested pomegranate fruit (‘Wonderful’). Acta Hortic. 1349, 669-678
DOI: 10.17660/ActaHortic.2022.1349.86
https://doi.org/10.17660/ActaHortic.2022.1349.86
phytohormone, brassinosteroids, postharvest quality, electrolyte leakage, antioxidant capacity
English

Acta Horticulturae