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@ARTICLE{Lippold:1049174,
      author       = {Lippold, Eva and Landl, Magdalena and Braatz, Eric and
                      Schlüter, Steffen and Kilian, Rüdiger and Mikutta, Robert
                      and Schnepf, Andrea and Vetterlein, Doris},
      title        = {{L}inking micro‐{X}‐ray fluorescence spectroscopy and
                      {X}‐ray computed tomography with model simulation explains
                      differences in nutrient gradients around roots of different
                      types and ages},
      journal      = {The new phytologist},
      volume       = {246},
      number       = {4},
      issn         = {0028-646X},
      address      = {Oxford [u.a.]},
      publisher    = {Wiley-Blackwell},
      reportid     = {FZJ-2025-05257},
      pages        = {1780 - 1795},
      year         = {2025},
      note         = {.This project was carried out in the framework of the
                      priorityprogramme 2089 ‘Rhizosphere spatiotemporal
                      organisation – akey to rhizosphere functions’ funded by
                      Deutsche Forschungsgemeinschaft(DFG), German Research
                      Foundation (projectnos.: 403641034, 403801423 and
                      403640293). The μ-XRFinstrument was also funded by the DFG
                      (grant no.:344418428). The authors gratefully acknowledge
                      SebastianRGA Blaser for help with X-ray CT measurements and
                      analysis,Bernd Apelt for help in the laboratory whenever it
                      wasneeded, Maxime Phalempin for help with the root
                      segmentationalgorithm, Josefine Karte (Department Analytical
                      Chemistry,Helmholtz Centre for Environmental Research –
                      UFZ) forthe measurements of elemental contents in the soil
                      solutions,Lisa Hofmann for the measurement of root diameters
                      on completeroot systems and Gertraud Harrington for help
                      with samplepreparation of the thin sections. Open Access
                      fundingenabled and organized by Projekt DEAL.},
      abstract     = {Plant roots create chemical gradients within the
                      rhizosphere, but little information exists onthe effect of
                      root properties on the distribution of chemical gradients.
                      The research aim was toanalyse and model the effects of root
                      type and age, radial root geometry and root hairs onnutrient
                      gradients in the rhizosphere. Using micro-X-ray fluorescence
                      spectroscopy (μ-XRF) combined with X-ray computedtomography
                      (X-ray CT), we analysed nutrient gradients around root
                      segments with differentdiameters and ages of two Zea mays
                      genotypes (wild-type and root hair defective mutant)growing
                      in two substrates (loam and sand). Gradients of key
                      nutrients were compared withgradients obtained by a
                      process-based, radially symmetric 1D rhizosphere model.
                      Results show that root hairs matter for nutrient uptake
                      during supply limitation (phosphorus(P)), but not when it is
                      limited by uptake kinetics (calcium (Ca), sulphur (S)).
                      Higher Ca and Saccumulation was observed at the surface of
                      older and thicker root segments than at youngerand thinner
                      root segments. Micro-XRF proved suitable for the detection
                      of nutrient gradients of Ca and S, but not of P.While
                      continuum modelling was well suited to explain observed
                      nutrient gradients, it was lesseffective in representing
                      pore-related phenomena, such as precipitation reactions,
                      which callsfor new homogenization approaches.},
      cin          = {IBG-3},
      ddc          = {580},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217) / DFG project G:(GEPRIS)403801423 -
                      Koordinationsfonds (403801423) / DFG project
                      G:(GEPRIS)403640293 - Relevanz von Wurzelwachstum und
                      assoziierter Bodenstruktur für raum-zeitliche Muster
                      chemischer und biologischer Parameter und emergente
                      Systemfunktionen (403640293) / DFG project
                      G:(GEPRIS)403641034 - Modellierung von Selbstorganisation in
                      der Rhizosphäre (403641034)},
      pid          = {G:(DE-HGF)POF4-2173 / G:(GEPRIS)403801423 /
                      G:(GEPRIS)403640293 / G:(GEPRIS)403641034},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1111/nph.70102},
      url          = {https://juser.fz-juelich.de/record/1049174},
}