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Adventitious root development in cucumber explants. Explants without any pretreatment (nondepleted, white bars) or with an auxin depletion pretreatment (IAA-depleted, dark bars) were incubated as indicated for 7 d. Root number values are expressed as mean ± se (n = 20 explants from at least three independent experiments). SNP and IAA were used at 10 μm and the NO scavenger cPTIO was used at 200 μm. Bars with different letters are significantly different with P < 0.05 (t test).
