The Role of Some Pre and Postharvest Applications on Storage Behavior and Protein Pattern of Date Palm Fruits *Phoenix dactylifera* L. cvs. Berhi and Breim

*Dhia Ahmed Taain, Hamzah Abbas Hamzah and Abbas Mahdi Jasim*

## **Abstract**

Storage experiment was conducted to study the effect of some pre and postharvest natural control treatments which include ultraviolet light (UV) at the concentration of 1KGY for periods of (0, 5, 10) minutes, 1-MCP at the concentration of (0,0.5,1) ppm for 24 hour at 0°c, ozone (O3) at the concentration of 5 ppm for the periods of (0, 0.5, 1) hour, soaking in chitosan at the concentratons of (0,1,2) % and control treatment in addition to field-treated chitosan at the concentrations of 0%, 1%, and 2% by the aim of improving storage behavior of date palm fruits cvs. Berhi and Breim and determination the protein pattern of fruits after six months of storage at 10 2°C. Results of the protein pattern showed that protein bundles on polyacrylamide gel differed by their molecular weights, the number of protein bundles, and Breim cultivar fruits treated with chitosan recorded the highest number of bundles of seven bundles and the highest molecular weight of (173.857) kDa for the first bundle.

**Keywords:** date palm fruits, Berhi and Breim, chitosan, ultraviolet light (UV), ozone (O3)
