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Stylo root growth at different P levels. a Total root length. b Primary root length. c Lateral root length. d Root surface area. Fourteen-day-old stylo seedlings were subjected to 0, 100 and 250 μM KH2PO4 as low (Pi deprivation), moderate and high P supply treatments for 21 d, respectively. Each bar represents the mean of three independent replicates with SE. Different letters indicate significant differences among P treatments at P<0.05
