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Development, Vol 125, Issue 21 4303-4312, Copyright © 1998 by Company of Biologists
JOURNAL ARTICLES |
LE Sieburth, GN Drews and EM Meyerowitz
Department of Biology, McGill University, Montreal, PQ Canada H3A 1B1.
Angiosperms use a multi-layered meristem (typically L1, L2 and L3) to produce primordia that then develop into plant organs. A number of experiments show that communication between the cell layers is important for normal development. We examined whether the function of the flower developmental control gene AGAMOUS involves communication across these layers. We developed a mosaic strategy using the Cre/loxP site-specific recombinase system, and identified the sector structure for mosaics that produced mutant flowers. The major conclusions were that (1) AGAMOUS must be active in the L2 for staminoid and carpelloid tissues, (2) that AGAMOUS must be active in the L2 and the L3 for floral meristem determinacy, and (3) that epidermal cell identity can be communicated by the L2 to the L1 layer.
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