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Changes in the activity of phosphoenolpyruvate carboxylating enzymes in germinating yellow lupin seeds

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Abstract

The rate of phosphoenolpyruvate carboxylation by extracts from germinating lupin seeds was measured through the H14CO3 fixation. PEP carboxylation in seed axes increased during their imbibition, mainly as a result of the increase in the activity of PEP carboxylase [EC 4.1.1.31]. However, the activity of PEP carboxykinase [EC 4.1.1.38], present during the first 3 hours of imbibition, as well as the activity of PEP-carboxykinase [EC 4.1.1.49], after 24 hours of imbibition, have also been shown. Possible physiological role of the changes in the activity of PEP carboxylases during lupin seeds germination is discussed.

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Abbreviations

OAA:

oxaloacetate

PEP:

phosphoenolpyruvate

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Authors and Affiliations

  1. Department of Plant Physiology, A. Mickiewicz University, Al., Niepodległości 14, 61-713, Poznań, Poland

    Wiktoria Ratajczak, Władysław Polcyn, Teresa Lehmann & Lech Ratajczak

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  1. Wiktoria Ratajczak
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  2. Władysław Polcyn
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  3. Teresa Lehmann
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  4. Lech Ratajczak
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Ratajczak, W., Polcyn, W., Lehmann, T. et al. Changes in the activity of phosphoenolpyruvate carboxylating enzymes in germinating yellow lupin seeds. Acta Physiol Plant 20, 119–122 (1998). https://doi.org/10.1007/s11738-998-0001-9

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  • DOI: https://doi.org/10.1007/s11738-998-0001-9

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