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RT-PCR using RNA isolated from seedlings grown on MS medium (5S, 5-day-old shoots; 14S, 14-dayold shoots; 5R, 5-day-old roots; 14R, 14-day-old roots) or on soil (5WL, 5-week-old leaves; CL, cauline leaves, ST, stems; FL, flowers; SIL, siliques). Primers for the 18S gene were used for control reactions.
