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Chloroplast to nucleus communication triggered by accumulation of Mg-protoporphyrinIX

Author

Listed:
  • Åsa Strand

    (The Salk Institute
    the Howard Hughes Medical Institute
    The Salk Institute)

  • Tadao Asami

    (Plant Functions Laboratory)

  • Jose Alonso

    (The Salk Institute)

  • Joseph R. Ecker

    (The Salk Institute)

  • Joanne Chory

    (The Salk Institute
    the Howard Hughes Medical Institute
    The Salk Institute)

Abstract

Plant cells coordinately regulate the expression of nuclear and plastid genes that encode components of the photosynthetic apparatus. Nuclear genes that regulate chloroplast development and chloroplast gene expression provide part of this coordinate control. There is evidence that information also flows in the opposite direction, from chloroplasts to the nucleus1,2. Until now, at least three different signalling pathways have been identified that originate in the plastid and control nuclear gene expression3,4 but the molecular nature of these signals has remained unknown. Here we show that the tetrapyrrole intermediate Mg-protoporphyrin (Mg-ProtoIX) acts as a signalling molecule in one of the signalling pathways between the chloroplast and nucleus. Accumulation of Mg-ProtoIX is both necessary and sufficient to regulate the expression of many nuclear genes encoding chloroplastic proteins associated with photosynthesis.

Suggested Citation

  • Åsa Strand & Tadao Asami & Jose Alonso & Joseph R. Ecker & Joanne Chory, 2003. "Chloroplast to nucleus communication triggered by accumulation of Mg-protoporphyrinIX," Nature, Nature, vol. 421(6918), pages 79-83, January.
    • Handle: RePEc:nat:nature:v:421:y:2003:i:6918:d:10.1038_nature01204
    DOI: 10.1038/nature01204
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