Inhibition effect of MNPs to the growth medium in vitro study on root weight (per one root tip).

	Sample	Weight, g	I, %
1	Without MNPs	0.682 ± 0.043	—
2	Fe 1-1	0.096 ± 0.019	85.92
3	Fe 2-1	0.182 ± 0.006	73.31
4	Fe 3-1	0.287 ± 0.012	57.92
5	Fe 4-1	0.003 ± 0.002	99.56
6	Fe 5-1	0.450 ± 0.017	34.02
7	Fe 6-1	0.582 ± 0.008	14.66