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The role of potassium on maize leaf carbon exportation under drought condition

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMARTINEAU, Elsa
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorDOMEC, Jean-Christophe
ORCID: 0000-0003-0478-2559
IDREF: 195495667
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorBOSC, Alexandre
hal.structure.identifierKyoto University
dc.contributor.authorDANNOURA, Masako
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorGIBON, Yves
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorBENARD, Camille
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorJORDAN-MEILLE, Lionel
ORCID: 0000-0003-1169-7002
IDREF: 199700206
dc.date.issued2017
dc.identifier.issn0137-5881
dc.description.abstractEnClimate changes are mainly characterized by an increase in air temperature and a decrease in rainfalls. Potassium (K) nutrition is generally considered to alleviate plants tolerance to water deficit, especially by improving photosynthesis and phloem transport of carbohydrates from leaves to roots. The main objective of this study was to measure the effect of K on sugar transport and allocation under water-stressed conditions on maize (Zea mays L.). Maize plants were grown in pots under different water and K treatments. We used 13CO2 pulse-labelling to determine carbon exportation from leaves with δ13C analysis, within 1 week. The diurnal sugar content in leaves was measured, and net carbon assimilation accessed. Water deficit strongly reduced plant growth, while K nutrition appeared to be efficient in attenuating these effects. K deficiency significantly decreased starch content in leaves under well-watered but not under water-stressed treatment. A leaf carbon mass balance showed that K increased sugar export on a daily time scale, while instantaneous δ13C measurements did not show any significant effect, partly because of the very rapid δ13C decline after labelling. Our home-made labelling chamber proved to be successful in monitoring diurnal changes in δ13C for a C4 plant with high photosynthetic rates and fast carbon export, and also in determining the effect of a K deficiency on sugar export. Our results highlight a need for research into carbon export on leaves of different ages in fast-growing crops under the combined effect of water and nutrient stress.
dc.language.isoen
dc.publisherSpringer Verlag
dc.rights.urihttp://hal.archives-ouvertes.fr/licences/copyright/
dc.subject.enwater deficit
dc.subject.ensugar transport
dc.subject.encarbon export
dc.subject.enpulse labelling
dc.subject.enzea mays L.
dc.title.enThe role of potassium on maize leaf carbon exportation under drought condition
dc.typeArticle de revue
dc.identifier.doi10.1007/s11738-017-2515-5
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
bordeaux.journalActa Physiologiae Plantarum
bordeaux.page1-13
bordeaux.volume39
bordeaux.issue10
bordeaux.peerReviewedoui
hal.identifierhal-02625796
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02625796v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Acta%20Physiologiae%20Plantarum&rft.date=2017&rft.volume=39&rft.issue=10&rft.spage=1-13&rft.epage=1-13&rft.eissn=0137-5881&rft.issn=0137-5881&rft.au=MARTINEAU,%20Elsa&DOMEC,%20Jean-Christophe&BOSC,%20Alexandre&DANNOURA,%20Masako&GIBON,%20Yves&rft.genre=article


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