Table 1.

Summary of plant growth promoting (PGP) traits showed by native nitrogen fixing bacterial strains isolated from rhizosphere and roots of tomato crop.

Strain	Source	Shape	Gram reaction†	P solubilization efficiency (%)	Siderophores production (% halo)
6R1	Rhiz	Cocci	−	120	nd
6L	Rhiz	Cocci	+	120	nd
22D4	Rhiz	Bacilli	−	200	0.80
25L4	Rhiz	Bacilli	−	140	0.67
27T4	Rhiz	Bacilli	−	260	0.78
28H	Rhiz	Bacilli	+	160	0.20
35I	Rhiz	Bacilli	+	120	nd
40B4	Rhiz	Bacilli	−	120	0.82
45R4	Rhiz	Bacilli	−	140	0.33
42P4	Rhiz	Bacilli	−	283	1.33
42Q4	Rhiz	Bacilli	−	250	0.67
46A	Rhiz	Bacilli	−	nd	nd
46B	Rhiz	Bacilli	−	nd	nd
89B	Rhiz	Cocci	−	120	nd
50G	Rhiz	Cocci	+	180	0.4
60I1	Rhiz	Bacilli	+	207.5	0.8
65I4	Rhiz	Bacilli	−	250	0.5
74M4	Rhiz	Bacilli	−	267	0.67
2O	Root	Cocci	+	120	0.33
8Q1	Root	Cocci	−	156	nd
20L1	Root	Bacilli	−	140	nd
24 K	Root	Bacilli	+	120	0.2
24K1	Root	Bacilli	−	120	0.14
25X1	Root	Bacilli	−	200	1.30
25X2	Root	Bacilli	−	140	0.4
43Y	Root	Bacilli	−	240	0.60
53F	Root	Bacilli	−	217	0.75
53F1	Root	Bacilli	−	167	0.4
54E	Root	Bacilli	−	nd	nd
57B1	Root	Cocci	+	120	nd
59U4	Root	Bacilli	−	167	0.89
59U5	Root	Bacilli	−	200	0.50
62F2	Root	Cocci	+	150	0.8
64H1	Root	Cocci	+	120	nd
64S1	Root	Bacilli	−	360	0.88
67Q	Root	Bacilli	−	120	0.73

^†( +) positive; (−) negative; nd not detected.