@article{fdi:010066164,
  title = {{P}hytoavailability of lead altered by two {P}elargonium cultivars grown on contrasting lead-spiked soils},
  author = {{A}rshad, {M}. and {M}erlina, {G}. and {U}zu, {G}a{\¨e}lle and {S}obanska, {S}. and {S}arret, {G}. and {D}umat, {C}. and {S}ilvestre, {J}. and {P}inelli, {E}. and {K}allerhoff, {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study assesses the potential of two contrasted fragrant {P}elargonium cultivars to induce p{H} and dissolved organic carbon ({DOC}) changes in the soil solution, {P}b speciation, and their subsequent effects on rhizosphere phytoavailable {P}b. {R}ooted plantlets were grown in special devices, floating on aerated nutrient solution in {PVC} tanks. {T}his setup allows roots to be physically separated, through a mesh, from a 3-mm soil matrix layer that can be considered as rhizosphere soil. {T}wo contrasted soils, each spiked with {P}b-rich particles, emitted from a battery recycling industry, were used at total burdens of 500 and 1500 mg {P}b kg(-1) in addition to a control unspiked soil. {S}oil solution p{H}, phytoavailable {P}b, {DOC}, {P}b adsorption, precipitation on roots, and {P}b phases in soil and plant were investigated. {A}ttar of {R}oses ({A}ttar) cultivar acidified its rhizosphere by 0.4 p{H} units in both spiked soils. {C}oncolor {L}ace ({C}oncolor) was unable to change soil solution p{H} on soil-1 and increased it by 0.7 units on soil 2. {C}oncentrations of {P}b in soil solution from {A}ttar plants were always higher than those of {C}oncolor ones. {DOC} contents of both unspiked soil-1 and soil-2 without plants were not significantly different. {I}n the case of spiked samples, {DOC} contents in the rhizosphere soil were increased by three and two times for {A}ttar and {C}oncolor, respectively, compared to the unspiked soil without plant. {B}oth cultivars were able to increase {DOC} contents, independent of soil type and level of contamination. {A}ccumulation of {P}b in shoots and roots was higher in {A}ttar as compared to {C}oncolor due to enhanced available {P}b as a result of p{H} and {DOC} modifications of the rhizosphere soil. {S}ignificant amounts of {P}b were adsorbed on roots of both cultivars. {X}-ray elemental analysis of precipitates on roots revealed the association of {P}b with {P} in cylinder-like structures. {E}xtended {X}-ray absorption fine structure ({EXAFS}) spectroscopy revealed that {P}b was present, to a major extent in the inorganic form, mainly as {P}b{SO}4 in the soil, whereas it was complexed with organic species within plant tissues. {T}he conversion of {P}b into organic species could decrease toxicity, may enhance plant tolerance, and could increase translocation. {P}lant-induced changes were responsible for the modification of lead phases within the soil. {I}mmobile forms present in the source leaded particles as well as in the soils were converted into soluble species, ultimately improving the phytoavailable or soil solubilized {P}b.},
  keywords = {{DOC} ; {P}b ; {P}hytoavailability ; {R}hizosphere p{H} ; {S}oil solution ; {FRANCE}},
  booktitle = {},
  journal = {{J}ournal of {S}oils and {S}ediments},
  volume = {16},
  numero = {2},
  pages = {581--591},
  ISSN = {1439-0108},
  year = {2016},
  DOI = {10.1007/s11368-015-1248-6},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066164},
}