Fig. 6. Location of primordium progenitor cells. (A-E) Reconstructed view of the L1 layer of a shoot apex expressing 35S::YFP29-1, with (A) being the first time point and elapsed time in (B-E) marked on individual panels. (A) Initials that give rise to individual primordia (P-1, P-2, P-3 and P-4) are shown in enclosed areas marked in white. The progenitors of a given primordium are color-coded. (B-E) Primordia that have developed from the progenitors marked in A. Individual lineages within a primordium are color-coded. The same color has been used for each progenitor and its descendants.