. 2019 Nov 12;10:2591. doi: 10.3389/fmicb.2019.02591

TABLE 1.

Root activity and morphological parameters of Robinia pseudoacacia seedlings inoculated with or without Funneliformis mosseae and grown under the control Pb treatment (0 mg Pb kg^–1 soil) for 4 months.

Parameter	Non-inoculation	Inoculation
Root activity (μg g^–1 h^–1)	156.02	171.32^∗∗
Root length (cm)	3,134.62 ± 242.16	4,798.53 ± 662.27^∗
Root surface (cm²)	398.95 ± 23.84	718.18 ± 67.13^***
Root volume (cm³)	4.27 ± 0.37	5.72 ± 0.99^NS
Number of root tips	16,533.33 ± 175.25	33,782.67 ± 3,271.34^***
Root diameter (mm)	0.33 ± 0.02	0.45 ± 0.02^***
Number of root forks	35,009.67 ± 2627.45	40,368.33 ± 6,970.8^NS
Specific root length (cm g^–1)	1,575.23 ± 121.47	2,111.67 ± 261.45^∗

Shown are means ± SD (n = 3). Asterisks indicate significant differences between inoculated and non-inoculated groups under 0 mg kg^–1 Pb (^∗P < 0.05, ^∗∗P < 0.01, ^∗∗∗P < 0.000; t-test). NS: no significance.