A, B. Constitutive and BR-responsive growth of bes1-DxhsfA1qM seedlings. Hypocotyl elongation of 7-day-old dark-grown (A) and light-grown (B) seedlings on medium containing either 1 μM epi-BL, 1 μM BRZ or DMSO as a control (c). Left: Mean and SD of 30 plants. Significant difference at P≤0.05 of results is indicated with different letters and was determined with a Student's t-test. Right: photos of representative plants. 