(D) The fer-4 rhizosphere microbiome upregulated phosphate absorption gene expression. The roots of Col-0 were harvested after 4 weeks of inoculation with the Col-0 or fer-4 rhizosphere microbiome under LP condition, and the relative expression of Pi-absorbing genes was quantified via RT-qPCR. The data shown indicate the means ± SDs (n = 3, n refers to technical replicates); n.s., not significant; *, p < 0.05; **, p < 0.01 (Student's t test). Data information: All experiments were repeated three times with similar results. 