الفهرس 
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Abstract
Wheat (Triticum aestivum L.) is one of the main crops consumed by humans and it is cultivated in different environments in Egypt. The growing need of ecological agricultural products together with the increased demand of vegetable raw materials for food production as well for other branches of industry imposes the necessity for searching new safer decisions for raising the agricultural production. Anthropogenic changes of the soil, water, and atmosphere due to the use of different chemical additives for raising plants productivity led to searching alternative ways. Safe methods for increasing the yield include the reasonable use of chemicals and substitution of some of them by appropriate physical treatment. The objective of present work was devoted to study the impact of grains pre-treatment irradiation with low intensity He-Ne laser (wavelength; 63208nm) on various physiological,biochemical, biophysical and morphological parameters of different common wheat cultivars in Egypt (Sakha-93, Sakha-94, Sakha-95,Sids-1,Gemmiza-9 and Giza-168).