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000905118 037__ $$aFZJ-2022-00410
000905118 1001_ $$0P:(DE-Juel1)177956$$aSchultes, Sina$$b0$$ufzj
000905118 1112_ $$aPlant Biology Europe 2021$$conline$$d2021-06-28 - 2021-07-01$$wItaly
000905118 245__ $$aLinking root carbon partitioning to inter-kingdom microbial variation in the maize rhizosphere
000905118 260__ $$c2021
000905118 3367_ $$033$$2EndNote$$aConference Paper
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000905118 520__ $$aAs much as 20% of a crop’s photosynthetically fixed carbon is transported belowground where it is used for root growth, respirated or released into the rhizosphere. The excretion of plant derived carbon compounds into the rhizosphere is a substantial source of soil organic carbon. It supports the development of rhizosphere microorganisms and can thereby benefit plant performance. Meanwhile, little is known about the temporal and spatial distribution patterns of recently fixed carbon in roots and how it links to the rhizosphere microbial community structure. To address this point, we employed a combination of the two non-invasive imaging techniques magnetic resonance imaging (MRI) and positron emission tomography (PET) to visualize root carbon allocation over time. MRI allows 3D monitoring of root growth in soil, while PET uses the short-lived radioactive 11CO2 to trace recently fixed carbon within the root system. Maize plants were grown in a sandy loam for three weeks. Roots were scanned using MRI and PET at day 6, 13 and 21 after sowing. Monitoring of root growth and tracer allocation revealed an increased accumulation of recently assimilated carbon at root tips, particularly at young crown root tips. On day 21 after sowing, image-guided sampling based on co-registration of PET and MRI scans allowed us to sample the rhizosphere at high spatial resolution, whilst targeting areas with distinct patterns of recently assimilated carbon. We furthermore distinguished between all relevant root types and age classes to document small-scale differences in microbial community structure. Amplicon sequencing revealed that the community composition of bacteria, fungi and protists was significantly influenced by both, root carbon partitioning and the associated root type. During the congress, findings of bacterial, fungal and protist community analysis will be discussed, along with the associated tracer allocation patterns obtained by MRI/PET.
000905118 536__ $$0G:(DE-HGF)POF4-2172$$a2172 - Utilization of renewable carbon and energy sources and engineering of ecosystem functions (POF4-217)$$cPOF4-217$$fPOF IV$$x0
000905118 7001_ $$0P:(DE-HGF)0$$aRüger, Lioba$$b1
000905118 7001_ $$0P:(DE-Juel1)129360$$aMetzner, Ralf$$b2$$ufzj
000905118 7001_ $$0P:(DE-Juel1)131784$$aPflugfelder, Daniel$$b3$$ufzj
000905118 7001_ $$0P:(DE-Juel1)129425$$avan Dusschoten, Dagmar$$b4$$ufzj
000905118 7001_ $$0P:(DE-Juel1)171304$$aHinz, Carsten$$b5$$ufzj
000905118 7001_ $$0P:(DE-HGF)0$$aBonkwoski, Michael$$b6
000905118 7001_ $$0P:(DE-Juel1)166460$$aWatt, Michelle$$b7
000905118 7001_ $$0P:(DE-Juel1)165733$$aKoller, Robert$$b8$$eCorresponding author$$ufzj
000905118 7001_ $$0P:(DE-HGF)0$$aKnief, Claudia$$b9
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000905118 9141_ $$y2021
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