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Inhibiting Copper Amine Oxidase Using L-Aminoguanidine Induces Cultivar and Age-Dependent Alterations of Polyamine Catabolism in Tomato Seedlings

Author

Listed:
  • Ágnes Szepesi

    (Department of Plant Biology, Institute of Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary)

  • László Bakacsy

    (Department of Plant Biology, Institute of Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary)

  • Henrietta Kovács

    (Department of Plant Biology, Institute of Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary)

  • Árpád Szilágyi

    (Department of Biotechnology, Institute of Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary)

  • Zoltán Márton Köhler

    (Department of Biochemistry, Albert-Szent Gyorgyi Medical School, University of Szeged, H-6720 Szeged, Hungary)

Abstract

Many effects of polyamines (PAs) are well known in plant developmental processes; however, the significance of their catabolism is not well understood. Copper amine oxidase (CuAO) is involved in the degradation of diamine putrescine (Put). The genotype dependence and time-dependent effects of this enzyme are rarely examined, so this study aims to discover the role of CuAO in tomato genotypes in different stages of seedling development. Exogenously applied L-aminoguanidine (AG), a CuAO inhibitor, was used to decrease the activity of CuAOs. Based on our results, it can be concluded that there is a genotype dependence of Put degradation, and AG treatment caused a long-term shift of PA catabolism by changing the activities of polyamine oxidase (PAO), catalyzing the degradation of higher PAs. Our results demonstrate that the modification of PA catabolism could have long-term results in polyamine metabolism in different tomato genotypes.

Suggested Citation

  • Ágnes Szepesi & László Bakacsy & Henrietta Kovács & Árpád Szilágyi & Zoltán Márton Köhler, 2022. "Inhibiting Copper Amine Oxidase Using L-Aminoguanidine Induces Cultivar and Age-Dependent Alterations of Polyamine Catabolism in Tomato Seedlings," Agriculture, MDPI, vol. 12(2), pages 1-14, February.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:2:p:274-:d:749814
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