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Changes in plant growth, Cd partitioning and xylem sap composition in two sunflower cultivars exposed to low Cd concentrations in hydroponics

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorCORNU, Jean-Yves
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorBUSSIERE, Sylvie
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorCORIOU, Cécile
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorROBERT, Thierry
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorMAUCOURT, Mickaël
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorDEBORDE, Catherine
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorMOING, Annick
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorNGUYEN, Christophe
dc.date.issued2020
dc.identifier.issn0147-6513
dc.description.abstractEnThis study characterizes sunflower response to the levels of Cd encountered in moderately Cd-polluted soils. Two sunflower cultivars differing in their ability to sequestrate Cd in roots were exposed to low concentrations of Cd (0.5 nM or 100 nM) in hydroponics and sampled after 18 days (258 degree-days) when ten leaves were fully expanded. Plant growth, Cd uptake and partitioning among organs were monitored along with the ionomic (ICP-MS) and the metabolic (H-1-NMR) composition of the xylem sap. Sunflower tolerance to Cd differed between the two cultivars. The cultivar with the highest ability to sequestrate Cd in roots (Kapllan) was more tolerant to Cd than the one with the lowest ability (ES RICA). The 23% penalization of plant growth observed at 100 nM in cultivar ES RICA was associated with reduced xylem loading fluxes of soluble sugars, perhaps pointing to disruption of carbohydrate metabolism. Retention of Cd in the stem was higher at 100 nM than at 0.5 nM in the Cd-sensitive cultivar ES RICA, which can be seen as a sunflower strategy to restrict the amount of Cd delivered to the leaves under Cd stress. No direct connection was found between the speciation of Cd in the xylem sap and the Cd translocation efficiency, although significant changes in the free ionic fraction of Cd were observed between the two cultivars at 0.5 nM. The relevance of these results in promoting the use of sunflower in phytomanagement of Cd-polluted soils is discussed.
dc.description.sponsorshipDéveloppement d'une infrastructure française distribuée pour la métabolomique dédiée à l'innovation - ANR-11-INBS-0010
dc.description.sponsorshipSimulateur numérique de l'accumulation par les cultures des éléments traces minéraux contaminants du sol
dc.language.isoen
dc.publisherElsevier
dc.subjectMétabolomique
dc.subjectMétabolisme
dc.subject.enGenotypic variation
dc.subject.enLow Cd exposure
dc.subject.enPhytomanagement
dc.subject.enSunflower
dc.subject.enTolerance
dc.subject.en1H-NMR metabolomics
dc.title.enChanges in plant growth, Cd partitioning and xylem sap composition in two sunflower cultivars exposed to low Cd concentrations in hydroponics
dc.typeArticle de revue
dc.identifier.doi10.1016/j.ecoenv.2020.111145
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale/Amélioration des plantes
bordeaux.journalEcotoxicology and Environmental Safety
bordeaux.volume205
bordeaux.peerReviewedoui
hal.identifierhal-02926808
hal.version1
hal.popularnon
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02926808v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecotoxicology%20and%20Environmental%20Safety&rft.date=2020&rft.volume=205&rft.eissn=0147-6513&rft.issn=0147-6513&rft.au=CORNU,%20Jean-Yves&BUSSIERE,%20Sylvie&CORIOU,%20C%C3%A9cile&ROBERT,%20Thierry&MAUCOURT,%20Micka%C3%ABl&rft.genre=article


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