The fer-4 rhizosphere microbiome promotes plant growth and alleviates LP stress. Arabidopsis seeds were germinated on 1/2-strength MS media for 3 days and then transplanted to either HP or LP media for another 5 days. The seedlings were then transferred to vermiculite and inoculated with Col-0 or fer-4 rhizosphere microbiomes. (C), The seedlings were harvested, and the shoot fresh weight was measured 4 weeks after inoculation. The data shown indicate the means ± SDs (n = 7, n refers to the number of flowerpots (4 seedlings per flowerpot) per group). The different lowercase letters indicate statistical significance (one-way ANOVA). Data information: All experiments were repeated three times with similar results. 