Canadian Journal of Plant Science · 1979 · 28 citations · 2 references
AgricultureAgronomyCrop SciencesNutrient ManagementPlant NutritionSoil FertilityAmino Acid CompositionCrop NutritionFertilizer ManagementNitrogen AssimilationNitrogen ManagementNitrogen NutritionAmino Acid Composition AnalysisAmino AcidsGrain Amino Acid CompositionGrain Protein ContentNitrogen Effects On YieldNitrogen Fertilizer ManagementSeed Amino Acid ProfileSeed Protein Amino Acid Composition
Grain from hard red spring wheat (Triticum aestivum ’Neepawa’) grown with nine rates of N fertilizer (0–400 kg/ha) was analyzed for total N, non-protein N (NPN), and amino acids. In addition, the amino acid compositions of the various soluble protein fractions were determined. The percentages of total N, NPN, and protein N of the grain increased with each 50-kg increment of N up to the 150-kg rate. The proportions of glutamate, proline, and phenylalanine in the seed increased whereas threonine, serine, glycine, alanine, and valine decreased with the first three or four increments of N fertilizer. With increasing N content in the seed, the proportions of albumin, globulin, and glutenin 2 decreased while the proportions of gliadin and glutenin 1 increased. The various protein fractions differed from each other in amino acid composition but the amino acid composition of each fraction was not influenced significantly by N application.
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