Figure 6

SPT acts additively with GA in the root. (A-D) Micrographs of 8 DAG roots. Arrowheads indicate the zone of cell proliferation. (A, B) Mock treated. (C, D) PAC treated. (A, C) Col-0. (B, D) spt-11. (E) RAM cell number of mock and PAC treated seedlings. Error bars indicate standard error. The values are means of three independent experiments (n = 15/replicate). (F-I) Micrographs of representative 7 DAG seedlings. Arrowheads indicate the zone of cell proliferation. (F) Col-0. (G) spt-11. (H) ga3ox1-2; ga3ox2-1. (I) ga3ox1-2; ga3ox2-1; spt-11. (J) RAM cell number (n = 15). Asterisks and double asterisks indicate values that are significantly different from wild type and ga3ox1-2; ga3ox2-1, respectively. Scale bars indicate 100 μm.