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Effect of P deficiency on common bean. A, Soluble Pi content in different plant organs. B, Leaf area from fully expanded leaves. C, Root to shoot dry weight ratio. D, Pn rate as a function of changing Ci. Plants were grown for 3 weeks under P-deficient (black bars or circles) or in P-sufficient conditions (white bars or circles). Values are mean ± se from 12 determinations: three independent experiments with four replicates per experiment.
