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@INPROCEEDINGS{Schultes:905118,
      author       = {Schultes, Sina and Rüger, Lioba and Metzner, Ralf and
                      Pflugfelder, Daniel and van Dusschoten, Dagmar and Hinz,
                      Carsten and Bonkwoski, Michael and Watt, Michelle and
                      Koller, Robert and Knief, Claudia},
      title        = {{L}inking root carbon partitioning to inter-kingdom
                      microbial variation in the maize rhizosphere},
      reportid     = {FZJ-2022-00410},
      year         = {2021},
      abstract     = {As much as $20\%$ of a crop’s photosynthetically fixed
                      carbon is transported belowground where it is used for root
                      growth, respirated or released into the rhizosphere. The
                      excretion of plant derived carbon compounds into the
                      rhizosphere is a substantial source of soil organic carbon.
                      It supports the development of rhizosphere microorganisms
                      and can thereby benefit plant performance. Meanwhile, little
                      is known about the temporal and spatial distribution
                      patterns of recently fixed carbon in roots and how it links
                      to the rhizosphere microbial community structure. To address
                      this point, we employed a combination of the two
                      non-invasive imaging techniques magnetic resonance imaging
                      (MRI) and positron emission tomography (PET) to visualize
                      root carbon allocation over time. MRI allows 3D monitoring
                      of root growth in soil, while PET uses the short-lived
                      radioactive 11CO2 to trace recently fixed carbon within the
                      root system. Maize plants were grown in a sandy loam for
                      three weeks. Roots were scanned using MRI and PET at day 6,
                      13 and 21 after sowing. Monitoring of root growth and tracer
                      allocation revealed an increased accumulation of recently
                      assimilated carbon at root tips, particularly at young crown
                      root tips. On day 21 after sowing, image-guided sampling
                      based on co-registration of PET and MRI scans allowed us to
                      sample the rhizosphere at high spatial resolution, whilst
                      targeting areas with distinct patterns of recently
                      assimilated carbon. We furthermore distinguished between all
                      relevant root types and age classes to document small-scale
                      differences in microbial community structure. Amplicon
                      sequencing revealed that the community composition of
                      bacteria, fungi and protists was significantly influenced by
                      both, root carbon partitioning and the associated root type.
                      During the congress, findings of bacterial, fungal and
                      protist community analysis will be discussed, along with the
                      associated tracer allocation patterns obtained by MRI/PET.},
      month         = {Jun},
      date          = {2021-06-28},
      organization  = {Plant Biology Europe 2021, online
                       (Italy), 28 Jun 2021 - 1 Jul 2021},
      subtyp        = {After Call},
      cin          = {IBG-2},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {2172 - Utilization of renewable carbon and energy sources
                      and engineering of ecosystem functions (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2172},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/905118},
}