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@ARTICLE{Haupenthal:892378,
      author       = {Haupenthal, Adrian and Brax, Mathilde and Bentz, Jonas and
                      Jungkunst, Hermann F. and Schützenmeister, Klaus and
                      Kröner, Eva},
      title        = {{P}lants control soil gas exchanges possibly via mucilage},
      journal      = {Journal of plant nutrition and soil science},
      volume       = {184},
      number       = {3},
      issn         = {1522-2624},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2021-02039},
      pages        = {320-328},
      year         = {2021},
      abstract     = {Background: Gaseous matter exchanges in soil are determined
                      by the connectivity of the pore system which is easily
                      clogged by fresh root exudates. However, it remains unclear
                      how a hydrogel (e.g., mucilage) affects soil pore tortuosity
                      and gas diffusion properties when drying.Aims: The aim of
                      this viewpoint study is to extend the understanding of gas
                      exchange processes in the rhizosphere by (a) relating it to
                      the patterns formed by drying mucilage within pore space and
                      (b) to give a concept of the effect of drying mucilage on
                      soil gas diffusivity using the combination of experimental
                      evidence and simulations.Methods: To describe the effect of
                      mucilage on soil gas exchanges, we performed gas diffusion
                      experiments on dry soil–mucilage samples and took images
                      of glass beads mixed with mucilage to visualize the
                      formation of mucilage after drying, using Environmental
                      Scanning Electron Microscopy. Finally, we set up simulations
                      to characterize the geometric distribution of mucilage
                      within soil during the drying process.Results: Experiments
                      of gas diffusion show that mucilage decreases gas diffusion
                      coefficient in dry soil without significantly altering bulk
                      density and porosity. Electron microscopy indicates that
                      during drying mucilage forms filaments and interconnected
                      structures throughout the pore space reducing gas phase
                      connectivity. The evolution of these geometric structures is
                      explained via pore scale modelling based on identifying the
                      elastic strength of rhizodeposition during soil
                      drying.Conclusion: Our results suggest that releasing
                      mucilage may be a plant adaption strategy to actively alter
                      gas diffusion in soil.},
      cin          = {IBG-3},
      ddc          = {640},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {217 - Für eine nachhaltige Bio-Ökonomie – von
                      Ressourcen zu Produkten (POF4-217) / 2173 -
                      Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-217 / G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000646609700001},
      doi          = {10.1002/jpln.202000496},
      url          = {https://juser.fz-juelich.de/record/892378},
}