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@ARTICLE{Koch:865012,
      author       = {Koch, Axelle and Meunier, Félicien and Vanderborght, Jan
                      and Garre, Sarah and Pohlmeier, Andreas and Javaux, Mathieu},
      title        = {{F}unctional–structural root-system model validation
                      using a soil {MRI} experiment},
      journal      = {The journal of experimental botany},
      volume       = {70},
      number       = {10},
      issn         = {1460-2431},
      address      = {Oxford},
      publisher    = {Oxford Univ. Press},
      reportid     = {FZJ-2019-04577},
      pages        = {2797 - 2809},
      year         = {2019},
      abstract     = {Functional–structural root-system models simulate the
                      relations between root-system architectural and hydraulic
                      properties, and the spatio-temporal distributions of water
                      and solutes in the root zone. Such models may help identify
                      optimal plant properties for breeding and contribute to
                      increased water-use efficiency. However, it must first be
                      demonstrated that they accurately reproduce the processes
                      they intend to describe. This is challenging because the
                      flow and transport processes towards individual roots are
                      hard to observe. In this study, we demonstrate how this
                      problem can be addressed by combining co-registered root and
                      tracer distributions obtained from magnetic resonance
                      imaging with a root-system model in an inverse modeling
                      scheme. The main features in the tracer distributions were
                      well reproduced by the model using realistic root hydraulic
                      parameters. By combining the functional–structural
                      root-system model with 4D tracer observations, we were able
                      to quantify the water uptake distribution of a growing root
                      system. We determined that $76\%$ of the transpiration was
                      extracted through 3rd-order roots. The simulations also
                      demonstrated that accurate water uptake distribution cannot
                      be directly derived either from observations of tracer
                      accumulation or from water depletion. However, detailed
                      tracer experiments combined with process-based models help
                      decipher mechanisms underlying root water uptake.},
      cin          = {IBG-3},
      ddc          = {580},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:30799498},
      UT           = {WOS:000483174300016},
      doi          = {10.1093/jxb/erz060},
      url          = {https://juser.fz-juelich.de/record/865012},
}