Nitrogen Assimilation and Protein Synthesis in Wheat Seedlings as Affected by Mineral Nutrition. II. Micronutrients | Zendy

James E. Harper | Zendy; Gary M. Paulsen | Zendy

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Nitrogen Assimilation and Protein Synthesis in Wheat Seedlings as Affected by Mineral Nutrition. II. Micronutrients

Author(s) -

James E. Harper,

Gary M. Paulsen

Publication year - 1969

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.44.5.636

Subject(s) - micronutrient , nitrate reductase , glutamine synthetase , zinc , chemistry , molybdenum , nitrogen assimilation , micronutrient deficiency , zinc deficiency (plant disorder) , nutrient , glutamine , assimilation (phonology) , enzyme , amino acid , food science , agronomy , biology , biochemistry , inorganic chemistry , organic chemistry , linguistics , philosophy

Activity of nitrate reductase from Triticum aestivum L. seedlings was decreased by deficiencies of molybdenum, zinc, and chlorine. Nitrate accumulated in molybdenum-deficient seedlings, declined in zinc-deficient seedlings, and was unaffected by the other micronutrient treatments. Glutamic acid dehydrogenase activity was decreased by deficiency of molybdenum, the only nutrient that affected the enzyme. Glutamine synthetase activity was decreased only by copper deficiency, and glutamic-oxaloacetic transaminase was not affected by any micronutrient deficiencies. Incorporation of (14)C-leucine into protein by wheat seedlings was increased by molybdenum deficiency, apparently because of decreased inhibition from endogenous amino acids, and was decreased by copper deficiency. Protein content was not affected significantly by the micronutrient treatments.

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