Fig. 4

Fast- and slow-fermentation fiber treatments alter the abundances of substrate-level phosphorylation (SLP) enzymes and ATPases in the GIT microbiome of goats. A Shannon and richness indexes of genes encoding SLP enzymes and ATPases. B PCoA profile of genes encoding SLP enzymes and ATPases between two fiber types in all GIT regions (top) and individual GIT region (bottom). C Boxplot of total abundance of SLP enzymes and ATPases. D Heatmap of abundance of SLP enzymes and F-type, V/A-type, and V-type ATPases. E SLP enzymes (left) and F-type ATPase (right) gene distributions assigned by genus. F Correlation between the abundance of genes involved in ATP production, and nutrient digestibility, SCFA profile, abundance of genes involved in SCFA biosynthesis. R_FF, rumen in fast-fermentation fiber; R_SF, rumen in slow-fermentation fiber; I_FF, ileum in fast-fermentation fiber; I_SF, ileum in slow-fermentation fiber; C_FF, cecum in fast-fermentation fiber; C_SF, cecum in slow-fermentation fiber. The asterisks denote significant P values, *P < 0.05; **P < 0.01