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Endogenous content of total IAA in different organs of the seedlings. Free IAA was analyzed by mass spectrometry (SRM) in different apical organs (A). (B and C) In the root system (B) and in the apical part (C) of both wild-type and mutant seedlings. Quantification was performed in three independent experiments. Hyp., hypocotyl; Cot., cotyledons; Y.L., young leaves.
