The Pb accumulation found for T. minuta and B. pilosa leaves in our
study was lower than that reported by other authors in herbaceous species,
such as Kabata-Pendias and Pendias (1984) in Poland, and Palacios
et al., (2002) in Spain, where the Pb contents rose to 2700 and
4100 μg g−1 DW, respectively. However in these studies it was not
clear if Pb had come from direct airborne deposition or from the soil,
since the smelters were working during the research and it is known
that translocation from soil to aerial tissues is normally low (Huang and
Cunningham, 1996). In contrast, in our study the only source was the soi