Influence of Paraquat on Four Rhizobacteria Strains: Pantoea agglomerans, Rhizobium nepotum, Rhizobium radiobacter and Rhizobium tibeticum

Table 1: Inhibition of paraquat on bacterial strains.

Diameter (cm) of the inhibition zone according to the concentration							ANOVA test
Control		0.5g/L	1g/L	3g/L	6g/L	12g/L	ANOVA test
Pantoea agglomerans	0^a	0^a	0.85±0.10^b	0.90±0.00^b	1.50±0.20^c	2.68±0.15^d	df: 23 F: 1586.25 P: 0.000
Rhizobium nepotum	0^a	1.05^b	1.50±0.10^b,c	1.53±0.20^b,c	1.88±0.09^c,d	2.30±0.10^d	df: 23 F: 95.83 P: 0.000
Rhizobium radiobacter	0^a	1.03±0.09^b	1.55±0.10^c	1.53±0.30^c	1.78±0.15^c,d	2.05±0.10^d	df: 23 F: 3.23 P: 0.031
Rhizobium tibeticum	0^a	0^a	0.90±0.00^b	1.25±0.10^b,c	1.45±0.50^c,d	1.85±0.10^d	df: 23 F: 1316 P: 0.000

Different letters among treatments and control group indicate statistically significant differences (Tukey’s test, P < 0.05).