Date of Award
Master of Science (MS)
Date palm is an agricultural crop of economic importance in most Arab countries. Among the different varieties of date palms grown in the United Arab Emirates, the Barhi variety is extremely popular and is often consumed at the bisr stage (first edible stage). However, the major challenge for this fruit at bisr stage is to maintain its quality over a long period after harvest and during marketing. The objective of this study was to evaluate the synergistic effect of preharvest spraying with a natural elicitor, namely chitosan (Ch) 1%, alone and in combination with salicylic acid (SA) 2 mM and calcium chloride (Ca) 3%, on the quality parameters, shelf life and bioactive compound content of date fruit of cultivar 'Barhi' at harvest and during two months of cold storage. The results showed that all treatments significantly delayed the ripening and decay of date 'Barhi' compared to the control. Treatment Ch followed by Ch+ SA and Ch+ SA +Ca had the least weight loss. Treatments Ch + Ca, Ch + SA + Ca and Ch+ SA had significantly lower levels of total soluble solids compared to control fruits (TSS). The treatments Ch + Ca and Ch + Ca + SA did not exhibit rotten fruit after 60 days of cold storage. At the end of the storage period, the Ca treatment, followed by Ch + Ca + SA, had the highest levels of total phenols (TPC), flavonoids (TFC), and tannins (TC). Ch + SA + Ca, Ch + SA and Ch had significantly higher antioxidant and antimicrobial activities compared to the control. Based on these results, these treatments can be recommended to extend the shelf life of 'Barhi' date fruit. Our results suggest that the use of elicitor combinations to extend the shelf life of date fruit during cold storage is a promising strategy to maintain fruit quality and reduce postharvest pathogen damage.
Al Shaibani, Fatima Yaaqoub Yousef, "THE EFFECT OF NATURAL ELICITORS AND COLD STORAGE PERIOD ON QUALITY IMPROVEMENT OF UAE DATE PALM FRUITS (Phoenix dactylifera, CV. BARHI)" (2021). Theses. 885.