Cadmium Phytoremediation Potential of Napiergrass Cultivated in Kyushu, Japan

Table 1

Changes in cadmium (Cd) concentration and uptake of Napiergrass plants grown in Cd-containing hydroponic conditions in 2010.

Parameter	Cd solution (μM)
	0	50	100
Plant dry weight (g/plant)
2 weeks after treatment	2.11  ±  2.09	1.29  ±  0.58	0.64  ±  0.31
4 weeks after treatment	5.84  ±  9.98	0.69  ±  0.74	2.13  ±  1.63
8 weeks after treatment	45.19^a  ±  37.44	4.03^b  ±  3.14	3.39^b  ±  1.15
Cd concentration (mg/kg)
2 weeks after treatment	0	41	42
4 weeks after treatment	0	41	46
8 weeks after treatment	0.3	31	58
Cd uptake (g/plant)
2 weeks after treatment	0^b	0.053^a  ±  0.024	0.027^a  ±  0.013
4 weeks after treatment	0	0.028  ±  0.030	0.098  ±  0.075
8 weeks after treatment	0.014^b  ±  0.011	0.125^a  ±  0.097	0.196^a  ±  0.066

Means in the same row followed by the same letter were not significantly different at based on LSD test.