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NO and auxin stimulate cGMP accumulation in soybean roots. a, Roots were treated with SNP (•, control; ○, 50 nm; ∇, 100 nm; ▾, 500 nm). b, Roots were treated with 5 μm auxin (•, IAA; ○, control) and cGMP content assayed at different times. Values are the means ± se for five independent experiments.
