Fig. 3

Nitrogen cycling genes found in maize rhizosphere soil under fertilizer treatments plotted with an online software—Circos. The meaning of the gene abbreviations are (glnA) glutamine synthetase, (gltB) glutamate synthase (NADPH/NADH) large chain, (gudB) glutamate dehydrogenase, (glnD) uridylyltransferase, (gltD) glutamate synthase (NADPH/NADH) small chain, (nirB) nitrite reductase (NAD(P)H) large subunit, (narG) nitrate reductase 1, alpha subunit, (gdhA) glutamate dehydrogenase (NADP+), (glnG) two-component system, nitrogen regulation response regulator GlnG, (no) nitrate reductase catalytic subunit [EC:1.7.99.4], (ureC) urease subunit alpha, (nifA) Nif-specific regulatory protein, (no-F) nitrite reductase (NO-forming), (norB) nitric oxide reductase subunit B, (nosZ) nitrous-oxide reductase, (glnB) nitrogen regulatory protein P-II 1, (ureaC) urea carboxylase, (narH) nitrate reductase 1, beta subunit, (nirA) ferredoxin-nitrite reductase, (glnL) two-component system, nitrogen regulation sensor histidine kinase, (napA) periplasmic nitrate reductase, (nrfA) cytochrome c-552, (nitH) nitrile hydratase, (nitR) nitrate reductase (NADH), (norF) nitric-oxide reductase, (narI) nitrate reductase 1, gamma subunit, (urea) urease subunit gamma, (nirD) nitrite reductase (NAD(P)H) small subunit, (narL) two-component system, nitrate/nitrite response regulator, (nifH) nitrogenase iron protein NifH. Note: no, ureaC, nitH, no-f and nitR are our own abbreviation to contain it within the circos plot. These genes have no specific symbol or abbreviations representing them