Figure 3.

The reads numbers of functions related to the growth yield (Y-strategy), resource acquisition (A-strategy), and stress tolerance (S-strategy) according to KEGG annotations (A). Specific KEGG functional categories assigned to the Y-strategy (B), A-strategy (C), and S-strategy (D). The Roman numerals I, II, III, IV, V, VI, VII, and VII in subpanel (B) represent amino acid metabolism, carbohydrate metabolism, cell growth and death, signal transduction, energy metabolism, metabolism of cofactors and vitamins, nucleotide metabolism and transcription at the KEGG level 2, respectively. The Roman numerals I, II, and III in subpanel (C) represent membrane transport, cell motility and xenobiotics biodegradation and metabolism at the KEGG level 2, respectively. The Roman numerals I, II, III, and IV in subpanel (D) represent replication and repair, glycan biosynthesis and metabolism, metabolism of cofactors and vitamins and cellular community – prokaryotes, respectively. Orange asterisks indicate a higher abundance of functions in high-salinity soil, whereas green asterisks indicate a higher abundance of functions in low-salinity soil. Different letters indicate significant differences (p < 0.05). *p < 0.05, **p < 0.01, ***p < 0.001. HSC, high-salinity soil added with ¹³C-glucose; HSCNP, high-salinity soil added with ¹³C-glucose and NP nutrients; LSC, low-salinity soil added with ¹³C-glucose; LSCNP, low-salinity soil added with ¹³C-glucose and NP nutrients.