Table 3.

Distributions of PGP genes important for nutrient cycling

Nutrient	Gene function	C. cucumeris GSE06	C. hispalense DSM 25574	C. indologenes PgBE177	C. oleae DSM 25575	C. phosphatilyticum ISE14	C. salivictor NBC122	Chryseobacterium sp. T16E-39
N	Nitrogen metabolism	ntrC	ntrC	ntrC	ntrC	ntrC	ntrC	ntrC
	Ammonium transporter	amtB	amtB	amtB	amtB	amtB		amtB
	Nitrate and nitrite transporter		narK
								nrtB
		nrtC		nrtC	nrtC	nrtC	nrtC	nrtC
	Nitrite reduction	nasD	nasD	nasD	nasD	nasD		nasD
		nasF		nasF	nasF	nasF		nasF
			nirK
	Nitric oxide reduction	norB	norB			norB
	Nitrogen fixation		fixJ	fixJ				fixJ
		nifA		nifA		nifA	nifA	nifA
S	Sulphate transporter	cysA	cysA	cysA	cysA	cysA	cysA	cysA
				cysT
	Sulphur metabolism	cysD	cysD	cysD	cysD	cysD	cysD	cysD
		cysH	cysH	cysH	cysH	cysH	cysH	cysH
		cysI		cysI	cysI	cysI		cysI
		cysJ		cysJ	cysJ	cysJ		cysJ
		cysN	cysN	cysN	cysN	cysN	cysN	cysN
P	Glucose dehydrogenation	gdh	gdh	gdh	gdh	gdh	gdh	gdh
	Pyrroloquinoline quinone synthesis				pqqF
		pqqG	pqqG	pqqG	pqqG	pqqG	pqqG	pqqG
	High-affinity phosphate transporter	pstB	pstB	pstB	pstB	pstB	pstB	pstB
	Polyphosphate metabolism	ppk	ppk	ppk	ppk	ppk	ppk	ppk
Zn	Zinc transporter	zitB	zitB	zitB	zitB	zitB	zitB	zitB
		zntA	zntA	zntA	zntA	zntA	zntA	zntA
						zntR
		znuB	znuB	znuB	znuB	znuB	znuB	znuB
		znuC	znuC	znuC	znuC	znuC	znuC	znuC
	Glyoxylate/hydroxypyruvate reduction	ghrB	ghrB	ghrB	ghrB	ghrB	ghrB	ghrB