Figure 4.

ARR proteins are important for arsenate (As^V)-induced root growth inhibition. A, Images of seedlings of the indicated genotypes grown on control medium (MS) or medium containing 250 μM As^V (As^V) for 6 d. Red boxes indicate the root length was significantly reduced by As^V. B, Quantification of the primary root length of seedlings shown in (A). Fisher’s LSD means separation test (SPSS) for multiple comparisons. Different lowercase letters indicate statistically significant differences (P < 0.01).