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Science 11 March 1994:
Vol. 263. no. 5152, pp. 1421 - 1423
DOI: 10.1126/science.263.5152.1421
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Articles
Cell Fate Determination by the Cell Wall in Early Fucus Development
Frederic Berger 1,
Alison Taylor 2, and
Colin Brownlee 2
1 Marine Biological Association, The Laboratory, Citadel Hill, Plymouth, PL1 2PB United Kingdom, and Ecole Normale Supérieure de Lyon, Laboratoire de Biologie Cellulaire et Moléculaire, F-69364, Lyon Cedex 07 France
2 Marine Biological Association, The Laboratory, Citadel Hill, Plymouth, PL1 2PB United Kingdom
In multicellular plants, development starts with an asymmetric division of the zygote into two differentiated cells. The nature and distribution of fate-determining factors operating during embryogenesis remain largely obscure. Laser microsurgery was used here to dissect two-celled embryos of the alga Fucus spiralis. Removal of protoplasts from the cell wall induced dedifferentiation. However, isolated cells within the walls followed their restricted fate. Moreover, contact of one cell type with the isolated cell wall of the other cell type caused its fate to be switched. The cell wall thus appears to maintain the differentiated state and to direct cell fate in plant development.
Submitted on September 22, 1993
Accepted on December 10, 1993
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