Table 1: Mean concentrations of heavy metals in mg L−1 (±SEM) () in the leaves of gray .

SiteCrCuFeMnMoNiZn

Tubli2.45
18.46
659.77
31.51
5.95
6.55
49.00
Sitra (1)2.22
18.92
638.30
34.38
35.99
6.10
31.38
Sitra (2)2.09
17.85
625.97
32.97
11.41
6.81
42.09
Einollahipeer et al. (2013)37.732.4433.83
Abohassan (2013)4.534.1739.5411.146.744.23
Usman et al. (2013)8.15–14.9256–356.61.37–4.0229.5–36.8
Almahasheer et al. (2014)107.22635.080.393.62

in the same column not connected with the same letter are significantly different (). Pb was not detectable.