Fig. 2
From: Identification and interest of molecular markers to monitor plant Pi status
Growth of rapeseed plants exposed to different concentrations of Pi for 30 days. a Photos (two plants/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 method). d Relative gene expression of selected molecular markers. All values are relative to control (0 µM Pi roots or shoots), which is normalized to 1. BnACTIN-7 and BnEf-1alpha were used as housekeeping genes. Bars indicate means ± SD. Different letters indicate significant different means (one-way ANOVA followed by SNK test, p < 0.05, n = 7–14 for b, n = 5–7 for c-d)