Fahr M. auteur aut IRD Laplaze Laurent auteur aut IRD Bendaou N. auteur aut IRD Hocher Valérie auteur aut IRD El Mzibri M. auteur aut IRD Bogusz Didier auteur aut IRD Smouni A. auteur aut IRD text journalArticle eng text/pdf born digital access Lead (Pb) is one of the most widespread heavy metal contaminant in soils. It is highly toxic to living organisms. Pb has no biological function but can cause morphological, physiological, and biochemical dysfunctions in plants. Plants have developed a wide range of tolerance mechanisms that are activated in response to Pb exposure. Pb affects plants primarily through their root systems. Plant roots rapidly respond either (i) by the synthesis and deposition of callose, creating a barrier that stops Pb entering (ii) through the uptake of large amounts of Pb and its sequestration in the vacuole accompanied by changes in root growth and branching pattern or (iii) by its translocation to the aboveground parts of plant in the case of hyperaccumulators plants. Here were view the interactions of roots with the presence of Pb in the rhizosphere and the effect of Pb on the physiological and biochemical mechanisms of root development. specialized root lead tolerance uptake root development 076 4 175 2013 1664-462X https://www.documentation.ird.fr/hor/fdi:010061480 10.3389/fpls.2013.00175 1664-462X [F B010061480] https://www.documentation.ird.fr/hor/fdi:010061480 https://www.documentation.ird.fr/intranet/publi/2014/02/010061480.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2014-03-03 2017-08-23 fdi:010061480 fre