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Relation of the long hypocotyl and higher auxin transport in alh1. Seedlings were grown on LNM supplemented with the indicated concentration of NPA, tri-iodo-benzoic acid (TIBA), or 2-naphthaleneacetic acid (2-NAA) for 10 d in a long-day photoperiod. White bars, LNM; striped bars, LNM + 1 μm NPA; gray bars, LNM + 30 μm 2-NAA; black bars, LNM + 50 μm TIBA. Error bars represent se.
