Figure 4.

Root phenotype of 35S:ARR1-SRDX transgenic plants. A, Transgenic plants show longer and more branched roots than wild-type plants. Seedlings were grown vertically on MS medium plates. The photograph was taken at 10 DAG. Bar = 1 cm. B, 35S:ARR1-SRDX transgenic plants produce longer primary roots than wild-type plants. The length of the primary root was determined at 10 DAG. C, 35S:ARR1-SRDX transgenic plants produce more lateral roots compared with the wild type. The number of emerged lateral roots was determined at 10 DAG. Results shown in B and C represent means from at least three independent replicates for each line. Error bars represent sd (n ≥ 15). Pairwise Student's t test was used to compare values with the wild type. **, 0.001 < P < 0.01. ARR1-S-8 and ARR1-S-10 are two independent lines of 35S:ARR1-SRDX transgenic plants. [See online article for color version of this figure.]