Fig. 6

PICRUSt predicted functions of bacteria at KO level. (A) Chao 1 index showed the functional diversities of KO profiles in each compartment of healthy and diseased tobacco plants. Asterisks (**, P < 0.01) indicate significant differences. (B) Ordination of functional genes using NMDS on KO level. (C) Heatmap exhibited the relative abundance of functional genes involved in carbon, nitrogen, and phosphorus cycling in each compartment. BS: bulk soils; RS: rhizosphere; RP: rhizoplane; ES: endosphere; D: diseased tobacco plants; H: healthy tobacco plants