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Rhizobium strain effect on nitrogen accumulation in pea relates to PEP carboxylase activity in nodules and asparagine in root bleeding sap



Rhizobium strain effect on nitrogen accumulation in pea relates to PEP carboxylase activity in nodules and asparagine in root bleeding sap



Physiological Limitations and the Genetic Improvement of Symbiotic Nitrogen Fixation: 51-55



Pisum sativum L. Bodil was infected with selected strains of Rhizobium leguminosarum (R501, 128c53, B155, 18a or 1044). The Rhizobium strains influenced the activity of PEP carboxylase in the plant cytosol of the nodules and the composition of amino acids transporting the fixed N in the root bleeding sap. The specific activity of nodule PEP carboxylase was highest in the symbioses which fixed the most N (B155, 18a and 1044).

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