ABA inhibits light-induced greening of etiolated seedlings through DET1. A, Effect of ABA on the greening of etiolated Col-0 and det1-1 seedlings. Four-day-old etiolated seedlings were treated without or with 1, 10, or 30 μm of ABA for 4 h under light conditions. Scale bar = 1 mm. B, The greening phenotype of 4-d-old etiolated Col-0 and det1-1 seedlings that were irradiated with light for 0, 4, 12, or 24 h. C, Total chlorophyll contents of the seedlings shown in A and B. Values are means ± sd. FW, Fresh weight.