Fig. 3
Effects of AM fungal colonization on chili pepper biomass (dry weight, DW), N and P acquisition under different NH4+ supply conditions. a and b, Shoot (a) and (b) root biomass. c-f, N and P contents in shoots (d, e) and roots (c, f). The chili pepper plants were inoculated with Rhizophagus irregularis, and grown under 0.2 mM, 1 mM, 2 mM, 5 mM NH4+ supply conditions for 5 weeks. AM, mycorrhizal plants; NM, nonmycorrhizal plants. Values are means ± SE of six biological replicates from two pots (n = 6). The asterisks indicate significant differences. *P < 0.05, ns, no significant difference