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Cyclic GMP is required for IAA- and NO-mediated adventitious root formation. Non-depleted explants were treated as indicated. A, Root number values are expressed as mean ± se (n = 10 explants from at least three independent experiments). Bars with different letters are significantly different with P < 0.05 (t test). The GC inhibitor LY 83583 was used at 50 μm, 8-Br-cGMP was used at 1 μm, and SNP and IAA were used at 10 μm. B, Photographs were taken after 5 d of treatment. Bar = 5 mm.
