Fig. 7. Cell division patterns in primordium progenitors and their descendents. (A-F) Reconstructed views of the L1 layer of the same SAM expressing 35S::YFP29-1, over a period of time. The elapsed time is indicated in individual panels. Cells of individual developing lineages are marked in different colors. (G-L) represents a similar analysis of the P-2 region of the same shoot apex. The lateral (L in red) and the medial (M in yellow) axis of the developing flower primordium are marked in (D). The cell division axis in primordial progenitors is referenced as parallel to the lateral axis of the flower primordium.