C17-tolerant mutants are sensitive to isoxaben and idaziflam. Five-day-old wild type (Col-0) and 12 C17-tolerant mutants (1B, 2C, 3D, 3F, 7L, 8P, 9Q, 9R, 14U, 14V, 18A1, and 20C1) grown on one-half Murashige and Skoog (1/2 MS) medium (mock, upper) or 1/2 MS medium supplemented with isoxaben (4 nm, middle) or idaziflam (0.5 nm, bottom). Scale bars, 5 mm.