Impact of Sewage Effluent Amended with the Chlorophyte Scenedesmus quadricauda or the Cyanophyt nostoc sp. on Some Metabolic Pools of Wheat and Alfalfa Plants

A pot experiment was conducted to study the influence of various irrigation regimes on some metabolic pools of wheat and alfalfa plants. The photosynthetic pigments and soluble proteins of the tested plants significantly increased when irrigated with sewage amended with Scenedesmus quadricauda or Nostoc sp. On the other hand, soluble carbohydrates decreased in wheat shoots at different treatments except those irrigated with sewage enriched with S. quadricauda. Sewage and that amended with Nostocsp caused promotion of total carbohydrates. Wheat plants with sewage water amended with Nostocspor with mixture of tap water and sewage have an inhibitory effect on free amino acids while alfalfa plants with sewage only enhanced them. Sewage effluent or that reclaimed with S. quadricauda caused significant increase in total lipids content of wheat shoots. In contrast, alfalfa plants exhibited significant decrease at all treatments. This study aimed to determine the effects of amended sewage effluent on metabolic pools of these plants. Estimated pools included the photosynthetic pigments, proteins (soluble and total), carbohydrate (soluble and total), free amino acids and total lipids in shoots of experimental plants.