Narrower cell width and root width in Spcdc25 RAMs. The left-hand panel comprises mean (± S.E) cell length and width (μm) in epidermal, cortical and stelar lineages extending from the tip of the RAM to the transition point for each tissue for the wild type (WT) and Spcdc25 line 9 expressing genotypes (levels of significance (P) are indicated by Student's t-test: *** P < 0.001; n = 50). The right hand panel comprises representative 10-day-old WT- and Spcdc25 expressing-whole root tips imaged by DIC/Nomarski microscopy. Solid white arrows indicate the Transition Point for the epidermal lineage. The overlaid T junctions at the transition point enable a measurement of root width at comparable distances from the apex of the RAM for both genotypes. Blow ups were then made for a cortical cell from both genotypes to show more clearly the reduction in cell size in Spcdc25 cf. WT. scale bars = 20 μm.