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@ARTICLE{Huber:255643,
      author       = {Huber, Katrin and Vanderborght, Jan and Javaux, Mathieu and
                      Vereecken, Harry},
      title        = {{S}imulating transpiration and leaf water relations in
                      response to heterogeneous soil moisture and different
                      stomatal control mechanisms},
      journal      = {Plant and soil},
      volume       = {394},
      number       = {1-2},
      issn         = {0032-079X},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2015-05777},
      pages        = {109-126},
      year         = {2015},
      abstract     = {AimsStomata can close to avoid cavitation under decreased
                      soil water availability. This closure can be triggered by
                      hydraulic (‘H’) and/or chemical signals (‘C’, ‘H +
                      C’). By combining plant hydraulic relations with a model
                      for stomatal conductance, including chemical signalling, our
                      aim was to derive direct relations that link soil water
                      availability, expressed as fraction of roots in dry soil
                      (fdry), to transpiration reduction.MethodsWe used the
                      mechanistic soil-root water flow model R-SWMS to verify this
                      relation. Virtual split root experiments were simulated,
                      comparing horizontal and vertical splits with varying fdry
                      and different strengths of stomatal regulation by chemical
                      and hydraulic signals.ResultsTranspiration reduction
                      predicted by the direct relations was in good agreement with
                      numerical simulations. For small enough potential
                      transpiration and large enough root hydraulic conductivity
                      and stomatal sensitivity to chemical signalling isohydric
                      plant behaviour originates from H + C control whereas
                      anisohydric behaviour emerges from C control. For C control
                      the relation between transpiration reduction and fdry
                      becomes independent of transpiration rate whereas H + C
                      control results in stronger reduction for higher
                      transpiration rates.ConclusionDirect relations that link
                      effective soil water potential and leaf water potential can
                      describe different stomatal control resulting in contrasting
                      behaviour.},
      cin          = {IBG-3},
      ddc          = {570},
      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:000360644200009},
      doi          = {10.1007/s11104-015-2502-9},
      url          = {https://juser.fz-juelich.de/record/255643},
}