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Water transport properties of the grape pedicel during fruit development: insights into xylem anatomy and function using microtomography

dc.rights.licenseopenen_US
dc.contributor.authorKNIPFER, Thorsten
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorGAMBETTA, Gregory
ORCID: 0000-0002-8838-5050
IDREF: 225449641
dc.contributor.authorMCELRONE, Andrew J.
dc.contributor.authorSHACKEL, Kenneth A.
dc.contributor.authorMATTHEWS, Mark A.
dc.date.accessioned2020-03-22T09:19:10Z
dc.date.available2020-03-22T09:19:10Z
dc.date.issued2015
dc.identifier.issn0032-0889en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/3897
dc.description.abstractEnXylem flow of water into fruits declines during fruit development, and the literature indicates a corresponding increase in hydraulic resistance in the pedicel. However, it is unknown how pedicel hydraulics change developmentally in relation to xylem anatomy and function. In this study on grape (Vitis vinifera), we determined pedicel hydraulic conductivity (kh) from pressure-flow relationships using hydrostatic and osmotic forces and investigated xylem anatomy and function using fluorescent light microscopy and x-ray computed microtomography. Hydrostatic kh (xylem pathway) was consistently 4 orders of magnitude greater than osmotic kh (intracellular pathway), but both declined before veraison by approximately 40% and substantially over fruit development. Hydrostatic kh declined most gradually for low (less than 0.08 MPa) pressures and for water inflow and outflow conditions. Specific kh (per xylem area) decreased in a similar fashion to kh despite substantial increases in xylem area. X-ray computed microtomography images provided direct evidence that losses in pedicel kh were associated with blockages in vessel elements, whereas air embolisms were negligible. However, vessel elements were interconnected and some remained continuous postveraison, suggesting that across the grape pedicel, a xylem pathway of reduced kh remains functional late into berry ripening.
dc.language.isoENen_US
dc.title.enWater transport properties of the grape pedicel during fruit development: insights into xylem anatomy and function using microtomography
dc.typeArticle de revueen_US
dc.identifier.doi10.1104/pp.15.00031en_US
dc.subject.halSciences du Vivant [q-bio]/Biologie végétaleen_US
bordeaux.journalPlant Physiologyen_US
bordeaux.page1590-1602en_US
bordeaux.volume168en_US
bordeaux.hal.laboratoriesEcophysiologie et Génomique Fonctionnelle de la Vigne (EGFV) - UMR 1287en_US
bordeaux.issue4en_US
bordeaux.institutionBordeaux Sciences Agroen_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
hal.identifierhal-02514376
hal.version1
hal.date.transferred2020-03-22T09:19:17Z
hal.exporttrue
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Plant%20Physiology&rft.date=2015&rft.volume=168&rft.issue=4&rft.spage=1590-1602&rft.epage=1590-1602&rft.eissn=0032-0889&rft.issn=0032-0889&rft.au=KNIPFER,%20Thorsten&GAMBETTA,%20Gregory&MCELRONE,%20Andrew%20J.&SHACKEL,%20Kenneth%20A.&MATTHEWS,%20Mark%20A.&rft.genre=article


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