Figure 4.

Effect of G. intraradices on shoot nitrogen percentage (a), shoot phosphorus percentage (b) and phosphorus use efficiency (c) of common bean genotypes CocoT and Flamingo grown in sand–soil culture after inoculation with R. tropici CIAT899, and with G. intraradices (grey bars) or not as control (open bars). Data are means ± SD of 6 replicates, plants harvested at 50 days after sowing; different letters indicate significant differences between treatment means according to Duncan’s multiple range test (p ⩽ 0.05).