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p. 233. Invertebrates and plantslocked

  • Lewis Wolpert

Abstract

‘Invertebrates and plants’ considers the fruit fly Drosophila melanogaster and the nematode Caenorhabditis elegans, as examples of invertebrate development, and the small cress-like weed Arabidopsis thaliana, a model plant for developmental studies. Cell fate in nematodes is often specified on a cell-by-cell basis, a typical characteristic of mosaic development, and does not rely on positional information established by gradients of morphogens. One difference in plants is that most of the development occurs not in the embryo, but in the growing plant. All the ‘adult’ structures of the plant — shoots, roots, stalks, leaves, and flowers — are produced in the adult plant from localized groups of undifferentiated cells known as meristems.

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