Fig. 7: Model of how peanut/maize intercropping enriches for Pseudomonas spp. in the rhizosphere to improve iron nutrition via secreting siderophore pyoverdine.

a Rhizosphere microbiome convergence occurs in peanut/maize intercropping through root interactions (whole microbiome level). b Pseudomonas cross-enriches during intercropping from the maize to the peanut rhizosphere (functional microbe). c Pseudomonas secretes the siderophore pyoverdine, which increases the iron availability in intercropping peanut rhizospheres (functional microbial metabolite).