Fig. 7

Phenotypic variations of ZYD6 and SN14 under Pi-deficiency conditions. a The root growth of soybeans on normal (1.25 mM Pi) or Pi-deficiency (−Pi, 0 mM Pi) Hoagland medium at the indicated time. W, week. Bar = 2 cm. b-h Quantification of phenotypic variations. b Primary root length. c Lateral root number. d Total root length. e Root biomass in terms of flesh weight. f Root biomass in terms of dry weight. g Shoot biomass in terms of flesh weight. h Shoot biomass in terms of dry weight. i-k The expression of the three closest homologs of Arabidopsis PHT1;4 in soybeans under Pi-deficient conditions. Expression of each gene in the normal conditions at 1 week (W) in roots of ZYD6 was set to 1. ZYD6 and SN14 respectively represent the wild and cultivated soybean. The * means significance at the P < 0.05 level, and the ** represent the significance at the P < 0.01 level