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@ARTICLE{Schwartz:820789,
      author       = {Schwartz, N. and Carminati, A. and Javaux, M.},
      title        = {{T}he impact of mucilage on root water uptake-{A} numerical
                      study},
      journal      = {Water resources research},
      volume       = {52},
      number       = {1},
      issn         = {0043-1397},
      address      = {[New York]},
      publisher    = {Wiley},
      reportid     = {FZJ-2016-06056},
      pages        = {264 - 277},
      year         = {2016},
      abstract     = {The flow of water between soil and plants follows the
                      gradient in water potential and depends on the hydraulic
                      properties of the soil and the root. In models for root
                      water uptake (RWU), it is usually assumed that the hydraulic
                      properties near the plant root (i.e., in the rhizosphere)
                      and in the bulk soil are identical. Yet a growing body of
                      evidence has shown that the hydraulic properties of the
                      rhizosphere are affected by root exudates (specifically,
                      mucilage) and markedly differ from those of the bulk soil.
                      In this work, we couple a 3-D detailed description of RWU
                      with a model that accounts for the rhizosphere-specific
                      properties (i.e., rhizosphere hydraulic properties and a
                      nonequilibrium relation between water content and matric
                      head). We show that as the soil dries out (due to water
                      uptake), the higher water holding capacity of the
                      rhizosphere results in a delay of the stress onset. During
                      rewetting, nonequilibrium results in a slower increase of
                      the rhizosphere water content. Furthermore, the inverse
                      relation between water content and relaxation time implies
                      that the drier is the rhizosphere the longer it takes to
                      rewet. Another outcome of nonequilibrium is the small
                      fluctuation of the rhizosphere water content compared to the
                      bulk soil. Overall, our numerical results are in agreement
                      with recent experimental data and provide a tool to further
                      examine the impact of various rhizosphere processes on RWU
                      and water dynamics.},
      cin          = {IBG-3},
      ddc          = {550},
      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},
      UT           = {WOS:000373117800016},
      doi          = {10.1002/2015WR018150},
      url          = {https://juser.fz-juelich.de/record/820789},
}