, Volume 198, Issue 1, pp 64–69

Cytosolic ascorbate peroxidase from Arabidopsis thaliana L. is encoded by a small multigene family


  • Maria Santos
    • John Innes Centre
  • Helene Gousseau
    • Laboratoire de MetabolismeINRA, Centre de Recherches de Versailles
  • Clare Lister
    • John Innes Centre
  • Christine Foyer
    • Laboratoire de MetabolismeINRA, Centre de Recherches de Versailles
  • Gary Creissen
    • John Innes Centre
  • Philip Mullineaux
    • John Innes Centre

DOI: 10.1007/BF00197587

Cite this article as:
Santos, M., Gousseau, H., Lister, C. et al. Planta (1996) 198: 64. doi:10.1007/BF00197587


A second cytosolic ascorbate peroxidase (cAPX; EC gene from Arabidopsis thaliana has been characterised. This second gene (designated APX1b) maps to linkage group 3 and potentially encodes a cAPX as closely related to that from other dicotyledonous species as to the other member of this gene family (Kubo et al, 1993, FEBS Lett 315: 313–317; here designated APX1a), which maps to linkage group 1. In contrast, the lack of sequence similarity in non-coding regions of the genes implies that they are differentially regulated. Under non-stressed conditions only APX1a is expressed. APX1b was identified during low-stringency probing using a cDNA coding for pea cAPX which, in turn, was recovered from a cDNA library by immunoscreening with an antiserum raised against tea plastidial APX (pAPX). No pAPX cDNAs were recovered, despite the antiserum displaying specificity for pAPX in Western blots.

Key words

ArabidopsisAscorbate peroxidase (cytosolic, plastidial)Multigene familyOxidative stressPisum



methionine translation initiation codon


base pair


cytosolic ascorbate peroxidase


plastidial ascorbate peroxidase


restriction fragment length polymorphism

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© Springer-Verlag 1996