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@ARTICLE{Huber:154373,
      author       = {Huber, Katrin and Vanderborght, Jan and Javaux, Mathieu and
                      Schröder, Natalie and Dodd, Ian C. and Vereecken, Harry},
      title        = {{M}odelling the impact of heterogeneous rootzone water
                      distribution on the regulation of transpiration by hormone
                      transport and/or hydraulic pressures},
      journal      = {Plant and soil},
      volume       = {384},
      number       = {1-2},
      issn         = {1573-5036},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2014-03721},
      pages        = {93-112},
      year         = {2014},
      abstract     = {Aims: A simulation model to demonstrate that soil water
                      potential can regulate transpiration, by influencing leaf
                      water potential and/or inducing root production of chemical
                      signals that are transported to the leaves.Methods:
                      Signalling impacts on the relationship between soil water
                      potential and transpiration were simulated by coupling a 3D
                      model for water flow in soil, into and through roots (Javaux
                      et al.2008) with a model for xylem transport of chemicals
                      (produced as a function of local root water potential).
                      Stomatal conductance was regulated by simulated leaf water
                      potential (H) and/or foliar chemical signal concentrations
                      (C; H+C). Split-root experiments were simulated by varying
                      transpiration demands and irrigation placement.Results:
                      While regulation of stomatal conductance by chemical
                      transport was unstable and oscillatory, simulated
                      transpiration over time and root water uptake from the two
                      soil compartments were similar for both H and H+C
                      regulation. Increased stomatal sensitivity more strongly
                      decreased transpiration, and decreased threshold root water
                      potential (below which a chemical signal is produced)
                      delayed transpiration reduction. Conclusions: Although
                      simulations with H+C regulation qualitatively reproduced
                      transpiration of plants exposed to partial rootzone drying
                      (PRD), long-term effects seemed negligible. Moreover, most
                      transpiration responses to PRD could be explained by
                      hydraulic signalling alone.},
      cin          = {IBG-3},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {246 - Modelling and Monitoring Terrestrial Systems: Methods
                      and Technologies (POF2-246) / 255 - Terrestrial Systems:
                      From Observation to Prediction (POF3-255)},
      pid          = {G:(DE-HGF)POF2-246 / G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000344336200008},
      doi          = {10.1007/s11104-014-2188-4},
      url          = {https://juser.fz-juelich.de/record/154373},
}