@article{PAR00007461,
  title = {{F}oliar lead uptake by lettuce exposed to atmospheric fallouts},
  author = {{U}zu, {G}a{\¨e}lle and {S}obanska, {S}. and {S}arret, {G}. and {M}unoz, {M}. and {D}umat, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}etal uptake by plants occurs by soil?root transfer but also by direct transfer of contaminants from the atmosphere to the shoots. {T}his second pathway may be particularly important in kitchen gardens near industrial plants. {T}he mechanisms of foliar uptake of lead by lettuce ({L}actuca sativa) exposed to the atmospheric fallouts of a lead-recycling plant were studied. {A}fter 43 days of exposure, the thoroughly washed leaves contained 335 ± 50 mg {P}b kg?1 (dry weight). {M}icro-{X}-ray fluorescence mappings evidenced {P}b-rich spots of a few hundreds of micrometers in diameter located in necrotic zones. {T}hese spots were more abundant at the base of the central nervure. {E}nvironmental scanning electron microscopy coupled with energy dispersive {X}-ray microanalysis showed that smaller particles (a few micrometers in diameter) were also present in other regions of the leaves, often located beneath the leaf surface. {I}n addition, submicrometric particles were observed inside stomatal openings. {R}aman microspectrometry analyses of the leaves identified smelter-originated {P}b minerals but also secondary phases likely resulting from the weathering of original particles. {O}n the basis of these observations, several pathways for foliar lead uptake are discussed. {A} better understanding of these mechanisms may be of interest for risk assessment of population exposure to atmospheric metal contamination.},
  keywords = {},
  booktitle = {},
  journal = {{E}nvironmental {S}cience and {T}echnology},
  volume = {44},
  numero = {3},
  pages = {1036--1042},
  year = {2010},
  DOI = {10.1021/es902190u},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00007461},
}