Figure 5.

Performance of the Mtpho2 mutants under symbiotic nitrogen fixation conditions. Plants were inoculated with S. meliloti strain Sm1021 and given optimal-P (0.5 mM Pi). (A) Representative four-week-old plants. Scale bar = 10 cm. (B) Plant dry weight. (C) Free phosphate (Pi) concentration in roots, young and old leaves. Data shown are the mean and SEM of three independent experiments (n=5/experiment). Asterisks indicate significant differences between the wild type and the mutants calculated using two-tailed Student’s t-tests (*p < 0.05, **p < 0.01, ***p < 0.001).