Developmental Regulation of the PORA and PORB Genes in Wildtype Arabidopsis Seedlings Grown in Far-Red Light and in the Dark-Grown cop1 Mutant

  • Geneviève Frick
  • Barbara van Cleve
  • Klaus Apel
  • Gregory A. Armstrong
Chapter

Abstract

The biochemical basis of light-dependent chlorophyll (Chl) biosynthesis in angiosperms, the most highly evolved group of higher plants, is the strictly light- and NADPH-dependent enzymatic reduction of protochlorophyllide (Pchlide), a late Chi biosynthetic precursor (1). Pchlide is converted to chlorophyllide by NADPH:Pchlide oxidoreductases A and B (PORA and PORB; EC 1.3.1.33), two structurally related but differentially regulated enzymes that are encoded in the nucleus, translated in the cytosol, and ultimately imported into plastids (2–4).

Key words

Chl biosynthesis chloroplast development etioplasts light regulation photomorphogenesis phytochromes 

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Copyright information

© Springer Science+Business Media Dordrecht 1998

Authors and Affiliations

  • Geneviève Frick
    • 1
  • Barbara van Cleve
    • 1
  • Klaus Apel
    • 1
  • Gregory A. Armstrong
    • 1
  1. 1.Swiss Federal Institute of Technology (ETH)Institute for Plant Sciences, Plant GeneticsZürichSwitzerland

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