Effect of Nitrogen Nutrition on Remobilization of Protein Sulfur in the Leaves of Vegetative Soybean and Associated Changes in Soluble Sulfur Metabolites.

摘要: The hypothesis that protein S is remobilized from mature leaves in response to N stress but not was examined by transferring vegetative soybean (Glycine max L. Merr) plants grown with adequate sulfate and nitrate nutrient medium low (5 [mu]M) at either 15, 7.5, 2, or 0.25 mM. Soluble decreased very levels maturing leaves, especially low-N plants. At high [N], insoluble (protein) remained constant, after the soluble declined, up 40% of exported. losses were complemented gains, initially S, subsequently expanding root. In plants, high-N decrease increases homoglutathione (hGSH), Cys, Met. developing leaf, leaf 5, contained amounts mostly hGSH. results suggest that, metabolized hGSH, which serves as principal transport compound for export organic S.