Fig. 3
From: Identification and interest of molecular markers to monitor plant Pi status
Growth of maize plants exposed to different concentrations of Pi for 30 days. a Photos (one plant/pot). Scale bar = 5 cm. b Shoot and root fresh weight (grams) and shoot-to-root ratio. c Shoot and root total free-Pi content (ng Pi/mg fresh weight; malachite green). d Relative gene expression of selected molecular markers. ZmEIF4A and ZmTUBULIN were used as housekeeping genes. All values are relative to control (0 µM Pi roots or shoots), which is normalized to 1. Bars indicate means ± SD. Different letters indicate significant different means (one-way ANOVA followed by SNK test, p < 0.05, n = 5–7)