. 2018 Jul 24;6:e5346. doi: 10.7717/peerj.5346

Table 3. Specific root area, specific root length, average of root diameter, and specific root density of our cultivars of sorghum.

Cultivars	Isolates	SRA (cm²/g)	SRL (cm/g)	AvD (mm)	RDENS (cm³/g)
SRN-39	Control	847.29 ± 44.46^a	687.39 ± 66.85^a	0.40 ± 0.02^a	0.12 ± 0.00^a
	IAC/BECa 99	1027.44 ± 130.77^a	867.21 ± 151.8^a	0.39 ± 0.02^a	0.11 ± 0.01^a
	IAC/BECa 128	1061.95 ± 146.42^a	881.21 ± 66.73^a	0.38 ± 0.03^a	0.11 ± 0.02^a
	IAC/BECa 135	1016.59 ± 59.11^a	882.89 ± 91.54^a	0.38 ± 0.02^a	0.11 ± 0.01^a
	IAC/BECa 141	1044.78 ± 68.45^a	883.43 ± 67.29^a	0.38 ± 0.02^a	0.10 ± 0.01^a
	IAC/BECa 152	914.74 ± 50.78^a	802.62 ± 69.77^a	0.37 ± 0.01^a	0.12 ± 0.00^a
SQR	Control	1021.64 ± 41.81^a	909.61 ± 69.28^a	0.36 ± 0.01^a	0.11 ± 0.00^a,b
	IAC/BECa 99	1034.82 ± 58.91^a	922.61 ± 62.72^a	0.36 ± 0.01^a	0.11 ± 0.01^a,b
	IAC/BECa 128	1217.28 ± 204.39^a	1220.4 ± 310.4^a	0.35 ± 0.02^a	0.10 ± 0.01^a,b
	IAC/BECa 135	1239.66 ± 109.67^a	1056.5 ±116.53^a	0.38 ± 0.02^a	0.09 ± 0.01^b
	IAC/BECa 141	1284.28 ± 207.40^a	1214.2 ± 211.88^a	0.34 ± 0.01^a	0.10 ± 0.01^b
	IAC/BECa 152	917.84 ± 26.31^a	894.24 ± 32.09^a	0.33 ± 0.01^a	0.13 ± 0.00^a
BRS330	Control	881.00 ± 28.55^b	609.24 ± 23.55^b	0.46 ± 0.01^a	0.10 ± 0.00^a,b
	IAC/BECa 99	926.69 ± 66.26^a,b	677.58 ± 47.12^a,b	0.43 ± 0.01^a,b	0.10 ± 0.01^a,b
	IAC/BECa 128	1101.94 ± 96.50^a	774.88 ± 72.32^a	0.46 ± 0.01^a	0.08 ± 0.01^b
	IAC/BECa 135	841.07 ± 80.40^b	645.94 ± 60.04^a,b	0.41 ± 0.01^b	0.12 ± 0.01^a
	IAC/BECa 141	767.82 ± 44.72^b	561.31 ± 32.04^b	0.44 ± 0.01^a,b	0.12 ± 0.01^a
	IAC/BECa 152	786.94 ± 14.98^b	605.28 ± 18.08^b	0.42 ± 0.01^b	0.12 ± 0.00^a
BRS509	Control	1337.8 ± 665.09^a	1121.9 ± 531.2^a	0.38 ± 0.03^a,b	0.17 ± 0.04^a
	IAC/BECa 99	707.81 ± 68.59^a	553.35 ± 62.87^a	0.41 ± 0.01^a	0.14 ± 0.01^a
	IAC/BECa 128	633.89 ± 45.40^a	524.96 ± 35.46^a	0.38 ± 0.01^a,b	0.17 ± 0.01^a
	IAC/BECa 135	779.74 ± 53.88^a	662.51 ± 50.39^a	0.38 ± 0.01^a,b	0.14 ± 0.01^a
	IAC/BECa 141	1130.4 ± 230.66^a	1138 ± 325.22^a	0.34 ± 0.02^b	0.12 ± 0.01^a
	IAC/BECa 152	703.37 ± 79.40^a	622.32 ± 74.82^a	0.36 ± 0.01^a,b	0.17 ± 0.02^a

Notes:

Specific root area (SRA), specific root length (SRL), average of root diameter (AvD), and specific root density (RDENS) four cultivars of sorghum (SRN-39, SQR, BRS330 and BRS509) inoculated with five bacterial isolates (IAC/BECa 99 (Kosakonia radicincitans), IAC/BECa 128 (Enterobacter asburiae), IAC/BECa 135 (Burkholderia tropica), IAC/BECa 141 (Pseudomonas fluorescens), and IAC/BECa 152 (Herbaspirillum frisingense).

Values are means of replicates (n = 6) ± (SE). For each parameter, letters compare (on column) the means between the bacterial inoculum treatments within the same cultivar. Means followed by the same letter are not statistically different by Duncan test (P < 0.05).