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@INPROCEEDINGS{Streun:1043654,
      author       = {Streun, Matthias and Scherer, Benedikt and Metzner, Ralf
                      and Huber, Gregor and Pflugfelder, Daniel and Chlubek,
                      Antonia and Koller, Robert and Knief, Claudia and Wüstner,
                      Peter and Zimmermann, Egon and Natour, Ghaleb},
      title        = {pheno{PET}: {O}bserving {C}arbon {T}ransport within
                      {I}ndividual {P}lants},
      reportid     = {FZJ-2025-02958},
      year         = {2025},
      abstract     = {Individual plants vary in their ability to respond to
                      environmental changes. For dynamic responses in plants,
                      long-distance carbon (C) transport is required to support
                      growth. Therefore, investigating C allocation in plants is
                      crucial for developing a mechanistic understanding of plant
                      functioning. However, little is known about short-term
                      assimilate transport patterns and velocities, as literature
                      values from singular and invasive measurements are hard to
                      interpret for a highly susceptible system. To study the
                      transport of photo assimilates within plants, we developed
                      phenoPET, a plant dedicated positron emission tomography
                      (PET) scanner. While PET scanners have been widely used in
                      medical science since decades, their use in plant research
                      is less common. For tracing the transport, carbon dioxide
                      containing the short-lived positron-emitting isotope
                      carbon-11 (<sup>11</sup>C) is applied as
                      <sup>11</sup>CO<sub>2</sub> to a single leaf or the whole
                      canopy of a living plant. The plant fixes CO<sub>2</sub> and
                      the <sup>11</sup>C is subsequently transported in the form
                      of photosynthates towards C sinks, e.g. through leaf and
                      stem towards the root system. The decaying tracer can then
                      be located inside the plant by detecting its radiation. To
                      this end, the living plant is placed in the field-of-view of
                      the scanner, which is a volume with a diameter of 18 cm and
                      a height of 20 cm. A lifting table can move the scanner
                      vertically and allows for repeated measurements of different
                      regions of interest along the plant axis. The phenoPET
                      system is located in a climate chamber equipped with LED
                      panels in order to create defined environmental conditions.
                      <br>In our presentation, we will highlight our workflow for
                      gathering quantitative data on C tracer transport velocities
                      between different plant types, single plants, for different
                      plant parts, during a day, and over days. We believe that
                      this will provide new insights into the functioning and
                      dynamics of C transport processes in in the plant-soil
                      system.},
      month         = {Apr},
      date          = {2025-04-27},
      organization  = {European Geoscience Union General
                       Assembly 2025, Vienna (Austria), 27 Apr
                       2025 - 3 May 2025},
      subtyp        = {After Call},
      cin          = {ITE / IBG-2},
      cid          = {I:(DE-Juel1)ITE-20250108 / I:(DE-Juel1)IBG-2-20101118},
      pnm          = {2171 - Biological and environmental resources for
                      sustainable use (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2171},
      typ          = {PUB:(DE-HGF)24},
      doi          = {10.5194/egusphere-egu25-4311},
      url          = {https://juser.fz-juelich.de/record/1043654},
}