FIG. 4.

Nodulation profiles produced in soybean primary roots by B. japonicum LP 3001 grown in GN0 (A and B), GN0.1 (C and D), or GN1 (E and F) for 5 days (A, C, and E) or 14 days (B, D, and F). The distribution of the nodules along the primary roots of 42 plants is shown as the number of nodules within intervals of 1 RDU from the root tip (RT) mark made at inoculation. The zero value corresponds to the root tip position; negative values represent those parts of the roots which grew after inoculation.