RHIZOtest: A plant-based biotest to account for rhizosphere processes when assessing copper bioavailability

Bravin Matthieu, Michaud Aurélia M., Larabi Bourane, Hinsinger Philippe. 2010. RHIZOtest: A plant-based biotest to account for rhizosphere processes when assessing copper bioavailability. Environmental Pollution, 158 (11) : pp. 3330-3337.

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Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Abstract : The ability of the free ion activity model (FIAM), the terrestrial biotic ligand model (TBLM), the diffusive gradients in thin films (DGT) technique and a plant-based biotest, the RHIZOtest, to predict root copper (Cu) concentration in field-grown durum wheat (Triticum turgidum durum L.) was assessed on 44 soils varying in pH (3.9e7.8) and total Cu (32e184 mg kg_1). None of the methods adequately predicted root Cu concentration, which was mainly correlated with total soil Cu. Results from DGT measurements and even more so FIAM prediction were negatively correlated with soil pH and over-estimated root Cu concentration in acidic soils. TBLM implementation improved numerically FIAM prediction but still failed to predict adequately root Cu concentration as the TBLM formalism did not considered the rhizosphere alkalisation as observed in situ. In contrast, RHIZOtest measurements accounted for rhizosphere alkalisation and were mainly correlated with total soil Cu. (Résumé d'auteur)

Mots-clés Agrovoc : Rhizosphère, Cuivre, Triticum turgidum

Classification Agris : P33 - Soil chemistry and physics

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Bravin Matthieu, CIRAD-PERSYST-UPR Recyclage et risque (FRA) ORCID: 0000-0002-1436-7837
  • Michaud Aurélia M., INRA (FRA)
  • Larabi Bourane, INRA (FRA)
  • Hinsinger Philippe, INRA (FRA)

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