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Nitrate and ammonium assimilation in plant roots and leaves at varying levels of nitrogen nutrition



Nitrate and ammonium assimilation in plant roots and leaves at varying levels of nitrogen nutrition



Fiziologiya Rastenii (Moscow) 33(4): 722-730



A comparative study of nitrate and ammonium assimilation in roots and leaves were carried out in lupin (Lupinus albus L.), maize (Zea mays L.) and cocklebur (Xanthium pensylvanicum L.) fed with varying levels of nitrogen. At low rates of applied nitrate is assimilation occurred mainly in the roots of all the plant species studied. At high nitrate uptake its assimilation took place both in roots and leaves. The rate of nitrogen assimilation in plants fed on ammonium was higher than that of plants fed on nitrate. In lupin nitrate reuction and ammonium assimilation occurred actively in roots and leaves. In cocklebur the roots assimilated only ammonium, while leaves assimilated both nitrate and ammonium. Both nitrate and ammonium assimilated most actively at low nitrogen in the medium.

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Accession: 005984546

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