Fig. 1.
Highly branched root architecture of the mutant TR185 irrespective of nitrate supply. (A and B) Representative examples of wild-type (WT) and TR185 plants grown for 14 days in a growth chamber on hydroponic culture tanks filled with nutrient solutions with high (A; 10mM, HN) or low (B; 1mM, LN) nitrate supply. Bars, 5cm. (C–E) Quantification of root architecture from 7 to 28 days after germination: lateral root number per plant (C), lateral root length (D), and total root length per plant (E). Data are mean±SE from three biological replicates of six plants each. Different letters above the columns indicate significant difference based on multiple comparisons (P<0.05, LSD test). The decrease in lateral root length at 28 days after germination in WT plants grown in HN has no biological significance (this figure is available in colour at JXB online).