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1988•Physiologia PlantarumRequires access

Nodule phosphoenolpyruvate carboxylase: a review

Marie-Esther Deroche, Elisa Carrayol

Open publisher page 43 citations

Abstract

Recent data concerning the fixation of CO2 and the functioning of phosphoenolpyruvate (PEP) carboxylase (EC 4.1.1.31) in legume, nodules are reviewed. The activites of N2 fixation (acctylene reduction) and PEP carboxylase are correlated Activities of PEP carboxylase are always higher in nodules than in roots. PEP carboxylase is located in the cytosol of the plant part of the nodules. When nodules are fed with 14CO2, radioactivity appears predominantly in malate and aspartate. The resolution of isoenzymes of PEP carboxylase shows one more band in nodules than in related roots. The role of PEP carboxylase in nodule metabolism is discussed.

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What this paper is about

Recent data concerning the fixation of CO2 and the functioning of phosphoenolpyruvate (PEP) carboxylase (EC 4.1.1.31) in legume, nodules are reviewed. The activites of N2 fixation (acctylene reduction) and PEP carboxylase are correlated Activities of PEP carboxylase are always higher in nodules than in roots. PEP carboxylase is located in the cytosol of the plant part of the nodules. When nodules are fed with 14CO2, radioactivity appears predominantly in malate and aspartate. The resolution of isoenzymes of PEP carboxylase shows one more band in nodules than in related roots. The role of PEP carboxylase in nodule metabolism is discussed.

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Available abstract

Recent data concerning the fixation of CO2 and the functioning of phosphoenolpyruvate (PEP) carboxylase (EC 4.1.1.31) in legume, nodules are reviewed. The activites of N2 fixation (acctylene reduction) and PEP carboxylase are correlated Activities of PEP carboxylase are always higher in nodules than in roots. PEP carboxylase is located in the cytosol of the plant part of the nodules. When nodules are fed with 14CO2, radioactivity appears predominantly in malate and aspartate. The resolution of isoenzymes of PEP carboxylase shows one more band in nodules than in related roots. The role of PEP carboxylase in nodule metabolism is discussed.

Key concepts: Phosphoenolpyruvate carboxylase, Pyruvate carboxylase, Root nodule, Nodule (geology), Phosphoenolpyruvate carboxykinase, Nitrogen fixation, Leghemoglobin, Biology

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