Physiological and biochemical studies for improving wheat production under saline conditions at Sahle El-Tina [electronic resource].

Includes references.

A field experiment was conducted during the two successive seasons of 2007/2008 and 2008/2009 at Sahle El-Tina. South of Sinai. Egypt. The main objective was to investigate exhibited physiological and biochemical salt tolerance responses of wheat (Triticum aestivum L.) plants cv. Giza168. The treatments were three foliar applications i.e. mono potassium phosphate (MPP). Nofatrein and tap water (control) as well as four grain soaking treatments i.e. CaCl2' ZnSO4., tap water and dry grain (control) under saline stress conditions. The main results could be summarized as follows: Grain soaked with ZnSO. before sowing significantly increased growth parameters, yield and yield components as compared with the control (dry grains) in both seasons. Also, CaCI2 gave the highest mean value after ZnSO. treatment. Whereas, plant height, fresh & dry weights/plant. flag leaf area and all yield components decreased significantly by sowing dry grains. Spray wheat plants with mono potassium phosphate (MPP) surpassed the other foliar application treatments. Nofatrein and tap water ranked the 2nd and 3rd order. respectively. MPP x CaCl2 and Nofatrein x ZnSO4. interaction were ranked the 2nd and 3rd order, respectively. Grain soaking and foliar application improved growth parameters, yield and yield components for wheat as compared with the control during both seasons. Application of chemical treatments enhanced photosynthetic pigments, solUble sugars. catalase activity, quaternary ammonium compounds, K, ca. KINa and Zn in wheat plants as compared with the control. Malondialdehyde content as a biochemical indicator for lipid peroxidation of cell membrane In wheat plants, free proline and Na showed an opposite trend under the same condition. Photosynthetic pigments, soluble sugars, catalase activity, quaternary ammonium compounds, K, KINa and Zn recorded the highest mean values due to mono potassium phosphate treatment. The maximum value of Ca and Mn was produced by plants which sprayed with Nofatrein. Grains soaked in ZnSO4. gave the highest mean value for photosynthetic pigments as well as total soluble sugars. Also, CaCl2 treatment recoreded the maximum value for catalse activity and choline, followed by ZnSO4. treatment.In addition, QAC recorded the highest mean value due to ZnSO4.

Summary in Arabic.

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