Abstract
The effect of macroelements on nitrogen assimilation, level of nitrate reductase (NR), glutamine synthetase (GS) and glutamate dehydrogenase (GDH) and content of nitrate nitrogen were studied in 17 day-old pea seedlings. The highest inhibition of NR was found at deficiencies of Mg and Ca while deficiency of K was less effective. The level of GS was decreased only in roots exclusively at deficiency of Mg. On the other hand, the deficiency of Mg and Ca increased the level of GDH. The lowest level of endogenous nitrate was found at deficiency of K. Present results show that assimilation of nitrate by plants was decreased by Mg and Ca deficiency while assimilation of ammonium was not affected.
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Gaudinová, A. The effect of mineral nutrition on nitrogen assimilation by intact plants ofPisum sativum L. Biol Plant 25, 449–455 (1983). https://doi.org/10.1007/BF02903145
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DOI: https://doi.org/10.1007/BF02903145