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@ARTICLE{Vandoorne:22889,
      author       = {Vandoorne, B. and Beff, L. and Lutts, S. and Javaux, M.},
      title        = {{R}oot {W}ater {U}ptake {D}ynamics of {C}ichorium intybus
                      var. sativum {U}nder {W}ater-{L}imited {C}onditions},
      journal      = {Vadose zone journal},
      volume       = {11},
      issn         = {1539-1663},
      address      = {Madison, Wis.},
      publisher    = {SSSA},
      reportid     = {PreJuSER-22889},
      pages        = {.},
      year         = {2012},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Chicory (Cichorium intybus L.) is a cash crop cultivated in
                      Western Europe for inulin production. Due to actual and
                      future climate changes, this plant could be exposed to
                      severe water stress at the end of its growing period,
                      leading to a decrease of its yield. The aim of this work was
                      to investigate the chicory root water uptake dynamics and
                      the plant ability to compensate a lack of water in the upper
                      horizons. We performed a controlled experiment with 3
                      replicates under contrasted irrigation scenarios. We
                      observed that, in case of drought, total root length
                      decreased and root profiles developed deeper. We
                      successfully used a one-dimensional Richards-based model
                      with a stress function and a compensation mechanism (Hydrus
                      1-D) to inversely characterize the dynamics of the actual
                      sink-term profiles under both irrigation scenarios. We could
                      also use the model to assess the compensation thanks to a
                      weighted stress index that is consistent between replicates.
                      The extraction profiles evolved differently under
                      water-deficit and controlled situations. The passive
                      compensation mechanism allowed chicory roots under
                      water-limited conditions to take water deeper in the soil,
                      where they had only few lateral roots. We found that, in
                      case of drought, compensation started before the plants had
                      to reduce their transpiration rate. Because the soil kept
                      drying out, compensation was not sufficient anymore,and the
                      plants had to decrease their transpiration some days later.
                      However, chicories maintained their metabolism and continued
                      to transpire and to growth slowly. This allowed them to
                      adapt thanks to an active compensation mechanism, by
                      generating new lateral roots in wetter horizons. This study
                      also showed that there was no unique Feddes stress parameter
                      set able to describe plant behavior under contrasted
                      irrigation conditions or even under different plant
                      development stages.},
      keywords     = {J (WoSType)},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Environmental Sciences / Soil Science / Water Resources},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000308526800028},
      doi          = {10.2136/vzj2012.0005},
      url          = {https://juser.fz-juelich.de/record/22889},
}