caa a22 4500 606217525 CHVBK 20210128101108.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s11104-015-2449-x doi (NATIONALLICENCE)springer-10.1007/s11104-015-2449-x Do roots or shoots control cadmium accumulation in the hyperaccumulator Noccaea caerulescens ? [Elektronische Daten] [Thibault Sterckeman, Monique Goderniaux, Catherine Sirguey, Jean-Yves Cornu, Christophe Nguyen] Aims: To rank the contributions of roots and shoots to Cd uptake by the hyperaccumulator Noccaea caerulescens, two hypotheses were tested: Shoots control the uptake through detoxification reactions; alternatively, roots do this through absorption and translocation. Methods: In a first experiment, plants with the same final age were exposed for 1, 2 or 3weeks to 0.5μM Cd in hydroponics. In another experiment, either roots or shoots or both were pruned before the plants were exposed for 1week to Cd at 0.5μM in the nutrient solution. Results: The first experiment showed that the Cd accumulation was driven by the root absorption combined with xylem loading, keeping the root Cd concentration constant. After root or/and shoot pruning, all the plants accumulated the same total quantity of Cd. After root pruning, the remaining roots increased their Cd absorption influx. Shoot pruning alone did not affect absorption or storage in roots and the pruned shoots accumulated as much Cd as the unpruned ones. Similar results were obtained for all major and minor nutrients. Conclusions: Root absorption and xylem loading are the major processes controlling Cd hyperaccumulation in N. caerulescens, the shoot being a compartment in which the metal exported by the roots is stored. Springer International Publishing Switzerland, 2015 Root pruning nationallicence Defoliation nationallicence Root uptake nationallicence Functional equilibrium nationallicence Translocation nationallicence Herbivore damage nationallicence Sterckeman Thibault Université de Lorraine, Laboratoire Sols et Environnement, UMR 1120, TSA 40602, 54818 Vandœuvre-lès-Nancy cedex, France aut Goderniaux Monique Université de Lorraine, Laboratoire Sols et Environnement, UMR 1120, TSA 40602, 54818 Vandœuvre-lès-Nancy cedex, France aut Sirguey Catherine Université de Lorraine, Laboratoire Sols et Environnement, UMR 1120, TSA 40602, 54818 Vandœuvre-lès-Nancy cedex, France aut Cornu Jean-Yves INRA, UMR 1391 ISPA, 33140, Villenave d'Ornon, France aut Nguyen Christophe INRA, UMR 1391 ISPA, 33140, Villenave d'Ornon, France aut Plant and Soil Springer International Publishing 392/1-2(2015-07-01), 87-99 0032-079X 392:1-2<87 2015 392 11104 https://doi.org/10.1007/s11104-015-2449-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2449-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sterckeman Thibault Université de Lorraine, Laboratoire Sols et Environnement, UMR 1120, TSA 40602, 54818 Vandœuvre-lès-Nancy cedex, France aut NATIONALLICENCE 700 1- Goderniaux Monique Université de Lorraine, Laboratoire Sols et Environnement, UMR 1120, TSA 40602, 54818 Vandœuvre-lès-Nancy cedex, France aut NATIONALLICENCE 700 1- Sirguey Catherine Université de Lorraine, Laboratoire Sols et Environnement, UMR 1120, TSA 40602, 54818 Vandœuvre-lès-Nancy cedex, France aut NATIONALLICENCE 700 1- Cornu Jean-Yves INRA, UMR 1391 ISPA, 33140, Villenave d'Ornon, France aut NATIONALLICENCE 700 1- Nguyen Christophe INRA, UMR 1391 ISPA, 33140, Villenave d'Ornon, France aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 392/1-2(2015-07-01), 87-99 0032-079X 392:1-2<87 2015 392 11104