Figure 6.

The amino acid and protein contents of 0.22-μm filtered root exudate from plants inoculated with strain BJ2 were higher than those from axenic plants; all were supplied with 20 μm selenate. The amino acid concentration in root exudate from bacteria-supplied plants (0.5–23.6 nmol mL⁻¹) was divided by that of axenic plants (0.2–9.2 nmol mL⁻¹). The protein content shown in the inset was calculated from the amino acid content.