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. 2014 Sep 24;9(9):e108459. doi: 10.1371/journal.pone.0108459

Figure 1. Plant growth experiments.

Figure 1

Foxtail millet plants grown in pots containing a 1∶1 (v/v) ratio of perlite:vermiculite and supplied with nutrient solution containing various concentrations of inorganic phosphate (Pi). A, 6-week old plants grown in various concentrations of Pi; from left to right: 300 µM, 100 µM, 50 µM, 10 µM and no added Pi (0 µM); B, image of flowers representative of plants grown for 12 weeks in the presence of sufficient (300 µM) or deficient (10 µM) Pi; C, plant height measured weekly for plants grown in the presence of various concentrations of Pi. Statistical analysis was conducted at the end of the recording period (i.e. at 8 weeks); D, shoot (S) and root (R) weight (mg) and root:shoot (R:S) weight ratio of foxtail millet seedlings grown for 16 days in the presence of sufficient (300 µM) or deficient (10 µM) Pi; and E, seed yield (seed dry weight) of plants grown in the presence of various concentrations of Pi after 16 weeks of growth. Data shown are means ± standard deviation (SD), n = 5. Values followed by the same letter were not significantly (P<0.05) different based on a Bonferroni post-hoc test. For Fig. 1D, data were tested by a t-test; *** represents a significant difference (P<0.001) between the shoots or roots of plants grown with high (300 µM) compared to low (10 µM) Pi concentrations.