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Differential accumulation of BR-biosynthetic P450 mRNAs in shoots and roots. A, Transcript levels in shoots (S) and roots (R) of wild-type seedlings. B, CPD/CYP90A1 transcript levels in shoots (S) and roots (R) of BR-insensitive cbb2 seedlings. C, CPD/CYP90A1 transcript levels in roots (R) of wild-type seedlings incubated for 4 h in the presence (BL) or absence (Ctr) of 100 nm BL. RT-PCR products were obtained from total RNA of 7-d-old seedlings. UBQ10 was used as internal control.
