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1 results

  • Tansley Review No. 91 Differentiation, growth and morphogenesis: Acetabularia as a model system

  • THEÉRÈSE VANDEN DRIESSCHE, GHISLAINE M. PETIAU-DE VRIES, JEAN-LUC GUISSET
  • Journal:
    The New Phytologist / Volume 135 / Issue 1 / January 1997
    Published online by Cambridge University Press:
    01 January 1997, pp. 1-20
    Print publication:
    January 1997

  • The aim of this paper is to review the present knowledge of the main aspects of differentiation of Acetabularia, a unicellular, eukaryotic organism, and to underline the multiple control pathways modulated by circadian rhythmicity. Growth and morphogenesis are sequentially programmed. Timing of cap differentiation is highly dependent on external conditions. The importance of the sequence of processes is shown by experimental disregulation.

    The alga is a highly polarized cell, both in morphology and in the relative concentrations of a number of the molecules it contains. Apical cap differentiation is regulated at the post-transcriptional level and could also depend in part on polyamines and on proteolytic activity.