دراسة التغيرات في محتوى الثمار خلال مراحل النضج و علاقتها بالسكريات و المواد الفينولية في راس نخيل التمر ملف أم الدهن Phoenix dactylifera L. cv. Um-Aldehin

This study was carried out during the growth season of 2002 at an orchard in the Abi-Khassib-Basrah to find out the chemical components of the fruits (total sugar, phenolic compounds, water content, TSS and dry weight) and their some physical characteristics of different stages of maturity and in meriste of date palm. The results showed that chemical characters changed very quikly as the fruits entered the ripening stage. Total, reducing and non-reducing sugars were increased significantly in Rutab stage as compared with Tamer and Khalal fruits. Whereas the reducing sugars in the meriste of date palm was decreased. But the sucrose and total sugars remained constant. The phenolic compound (tannin) completely disappeared in the Tamer stage while these appeared in Khalak, Rutab stages and meriste . The study also showed allow percentage of moisture content in the fruits, seeds and reached its minimum value with increased the dry matter percentage for pulp of fruits. The total soluble solids increased at final maturity stage. The fresh weight of fruits and seeds increased at Khalal stage and reached their minimum value at Tamer stage. The pulp of fruits/seeds ratio reached its high values at Tamer stage.