Fig. 5. An epidermis-specific enhancer trap is expressed in cells of the ground tissue in scz meristems. Expression of GFP-enhancer trap line N9173 in 3-day-old wild-type (A) and scz (B) meristems. (A) In wild type, the enhancer trap is expressed in the lateral root cap and the epidermis. Expression is evident immediately after division of the epidermis and lateral root cap daughter cells (arrow). (B) In scz mutants, expression in the epidermis starts higher in the root (arrow). Moreover, in the ground tissue clusters of cells show a lower level of expression (arrowheads). (C) Close-up of a cluster of cells shown in B illustrating expression of the marker in the ground tissue. Bar, 25 µm in A,B; 56 µm in C.

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