Early Events in Apical-basal Pattern Formation in Arabidopsis

  • Gerd Jürgens
  • Ramón A. Torres Ruiz
  • Thomas Laux
  • Ulrike Mayer
  • Thomas Berleth
Part of the NATO ASI Series book series (volume 81)

Abstract

Plant development is dominated by meristematic growth which continually adds new structures to the pre-existing body (Steeves and Sussex, 1989). A different mode of growth appears to prevail during a brief period of the life cycle: the developing embryo grows by disperse cell divisions, and this growth pattern may thus be termed embryonic. However, the switch from embryonic to meristematic growth is not coupled to physiological changes that signify the transition from the heterotrophic embryo to the autotrophic seedling, such as seed maturation, dormancy or germination. Embryonic growth rather seems related to developmental processes that generate the primary organisation of the plant body, including the meristems of the shoot and the root. In some flowering plant species, such as maize, the shoot meristem becomes active in the embryo, producing several leaf primordia while in others, including Arabidopsis, the shoot meristem remains nearly indistinct before seed germination (Medford, 1992). By contrast, the root meristem contributes to the formation of the seedling body in most flowering plant species (Rutishauser, 1969).

Keywords

Maize Expense 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature references

  1. Berleth T, Jürgens G (1993) The role of the monopteros gene in organising the basal body region of the Arabidopsis embryo. Development 118 (in press)Google Scholar
  2. Jürgens G, Mayer U (1993) Arabidopsis. In: A Colour Atlas of Developing Embryos. Bard J (ed). Wolfe Publ. LondonGoogle Scholar
  3. Mansfield SG, Briarty LG (1991). Early embryogenesis in Arabidopsis thaliana. II. The developing embryo. Can J Bot 69: 461–476CrossRefGoogle Scholar
  4. Mayer U, Torres Ruiz RA, Berleth T, Miséra S, Jürgens G (1991) Mutations affecting body organization in the Arabidopsis embryo. Nature 353: 402–407CrossRefGoogle Scholar
  5. Mayer U, Büttner G, Jürgens G (1993) Apical-basal pattern formation in the Arabidopsis embryo: studies on the role of the gnom gene. Development 117: 149–162Google Scholar
  6. Medford JI (1992) Vegetative apical meristems. The Plant Cell 4: 1029–1039PubMedCrossRefGoogle Scholar
  7. Rutishauser A (1969) Embryologie und Fortpflanzungsbiologie der Angiospermen. Springer-Verlag, New York, WienGoogle Scholar
  8. Steeves TA, Sussex IM (1989) Patterns in Plant Development. Cambridge University Press, CambridgeCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1994

Authors and Affiliations

  • Gerd Jürgens
    • 1
  • Ramón A. Torres Ruiz
    • 1
  • Thomas Laux
    • 1
  • Ulrike Mayer
    • 1
  • Thomas Berleth
    • 1
  1. 1.Institut für Genetik und Mikrobiologie, Lehrstuhl für GenetikUniversität MünchenMünchen 19Federal Republic of Germany

Personalised recommendations