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| Hauptseite > Online First > Uncovering Plant Carbon Dynamics with PET and Complementary Sensors |
| Hauptseite > Online First > Uncovering Plant Carbon Dynamics with PET and Complementary Sensors |
| Poster (After Call) | FZJ-2026-00462 |
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2025
Abstract: Positron Emission Tomography (PET) is a powerful technique in plant sciences for studying allocation and transport processes in vivo. Of particular interest is the radioisotope Carbon-11, which can be applied as ¹¹CO₂ to leaves and used as a tracer to monitor the movement of photoassimilates within complex three-dimensional structures such as root systems.We employ a fully characterized and calibrated, plant-dedicated PET scanner -the phenoPET- which is housed in a climate-controlled chamber, enabling us to perform routine PET measurements on plants under stable environmental conditions.The ¹¹CO₂ is produced using a cyclotron, trapped in a CO₂ capture unit, and delivered to the plants via a custom-built gas exchange system. This setup also allows continuous monitoring of ¹²CO₂ uptake before, during, and after the ¹¹CO₂ pulse labelling, using two infrared gas analyzers. In parallel, radioactivity detectors measure the amount of ¹¹CO₂ applied to the plant and the amount left-over after labelling, allowing us to quantify the exact amount of radiotracer being taken up the plant.In this poster, we present representative data from peripheral systems operating during a PET scan, demonstrating how this additional information can contribute valuable insights into plant physiology and the effects of applied treatments.
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