Fig. 2E presents the distribution of OrgHg concentrations in plant
samples. The concentration of OrgHg mercury varied from 1.0 to
88 μg kg−1 d.w. in roots (with a mean of 18 and a median of
6.7 μg kg−1 d.w.) and from 0.20 to 13 μg kg−1 d.w. in shoots (with a
mean of 4.1 and amedian of 3.9 μg kg−1 d.w.), representing on average
0.58% and 0.66% of THg in the respective plant parts. The percentages of
OrgHg in relation to THg obtained were comparable to the percentage
of MeHg reported in vegetation from Canada (Mailman and Bodaly,
2005) and Slovenia (Gnamus et al., 2000). It should be noticed that
the OrgHg concentration in root samples (median of 6.7 μg kg−1 d.w.)