Fig. 3

Altered root architecture in bik1 seedlings grown under + Pi and –Pi conditions. Seven-day-old seedlings grown under normal condition were transferred into fresh medium supplemented with (+Pi, 250 μM) or without Pi (−Pi) and grown for another 7 days. a Root architecture in WT and bik1 seedlings. b Root hairs in WT and bik1 seedlings. Fragments of 5 mm from root tips were presented. c to h Comparative parameters for length of primary roots (c), numbers of lateral roots (d), elongation of primary roots (e) and lateral roots (f), and numbers (g) and length (h) of root hairs of WT and bik1 seedlings grown under + Pi and –Pi condition. Data presented are the means ± SD from three independent experiments and different letters above the columns indicate significant differences at p < 0.05 level