Abstract

The study focused on six varieties of straw cereals (Triticum and Hordeum) subjected to a single water stress mode WHD (With Hydric Deficit) at 40% of the field capacity during three phenological stages. Five parameters were measured: morpho physiological parameters relative water content (RWC), chlorophyll content (Chl), leaf area (LA) and accumulation of osmolytes (proline and soluble sugars). The wheat varieties retain their relative high water content in the middle and at the end of the cycle. They accumulate large amounts of osmolytes proline and soluble sugars, maintaining a considerable leaf area. The two genotypes of barley exhibit two distinct behaviors. Saida marks the strong accumulation of proline 15 times the control and maintains his RWC, While Manel does not react to stress. The first genotype tolerates stress and the second resists. Wheat and barley exhibits physiological and biochemical adaptation lines under deficient conditions (markers).