Eurasian Journal of Biosciences

Influence of ascorbic acid and tocopherol on the vegetative, physiological and chemical traits of dates palm tissue, Barhi cultivar, irrigated from the Shatt Al-Arab water


This study was conducted in one of the private orchards in Al-Dair district, north of Basra Governorate during the 2019 AD growing season, with the aim of studying the effect of foliar spray with antioxidants, Asc and Toc on some physiological and biochemical traits of tissue dates palm offshots, Al-Barhi cultivar which was irrigated from Shatt Al-Arab water. The experiment included seven treatments with antioxidants using the concentrations 125, 250 and 375 mg L-1 for each in addition to the control treatment (with distilled water only). The offshoots were sprayed four times. The results of the study showed the following: 1) The treatment of spraying with Toc at a concentration of 375 mg.L-1 recorded a significant difference in the increase of the height of the offshoot, and in the leaf content of the soluble protein f.w. The treatment also recorded the highest amount of P and K that reach 1.60 and 4.23 mg.g-1 d.w, respectively, and led to a decrease in the amount of Cl-, as it reached 11.17 mg g-1 d.w. It also increased the activity of the Po enzyme, which reached 81.88 units g-1 d.w. 2) The results of the study showed that spraying with Asc with a concentration of 375 mg L-1 reported significantly higher increase in the number of leaves and the leaf area and % for the water content of the leaves. It also led to an increase in the pigment of total Chl, total soluble carbohydrates and vitamin C, whose concentrations in the leaves reached 6.92, 49.39 and 34.77 mg g-1 f.w. The same concentration of ascorbic acid reduced the proline and Na concentration in the leaves to 13.26 mg g -1 dry weight and 0.18 mg g-1 dry weight respectively. In addition, the treatment increased the concentration of N in the leaves that amounted to 21.33 d.w, as well as an increase in the K:Na to 22.50. It also led to lowering ABA to 41.83 µg g-1 f. w.


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