SPP 2089:  Rhizosphere Spatiotemporal Organisation - a Key to Rhizosphere Functions

• Subject Area: Agriculture, Forestry and Veterinary Medicine ; Biology ; Mathematics ; Medicine ; Thermal Engineering/Process Engineering
• Term: since 2018
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 359183561

The coordination proposal for PP 2089 Rhizosphere Spatiotemporal Organisation – a Key to Rhizosphere Functions – Phase 2 provides a brief introduction to the concept and hypotheses of the PP (section 1.1), gives a short overview of experimental platforms and joint sampling approaches (section 1.2) and comprises the summary of research findings from phase 1 (section 1.3.1 – 1.3.6). This summary also contains the field related measurements conducted by the coordination, which are not presented elsewhere. Data integration and initiation of joint manuscripts is addressed (section 1.3.7) and the aims and objectives of the PP in phase 2 are delineated (section 1.4) including research questions and associated shared experiments for phase 2. A specific challenge is the integration of data from different scales and disciplines (section 1.5). This leads to the specific tasks of the coordination (communication, PP-database BExIS, soil plot experiment, organisation of meetings/workshops, X-ray service, public relations) which all aim at enabling data synthesis (section 1.6). First examples of integrated work are listed in the bibliography (section 1.7). Given the limitation in space, description of research findings is very brief aiming at presenting results in an integrated manner. Likewise detailed description of new shared experiments will be found in the respective individual proposals.

• DFG Programme: Priority Programmes
• International Connection: Austria, Switzerland

Projects

• A molecular perspective on plant-microbiome interactions during rhizosphere development (Applicant Lechtenfeld, Oliver )
• Bridging biochemical gradients to elucidate key processes governing root -microbiome-soil interactions (Applicant Richnow, Hans Hermann )
• Characterization of radicle root hair functions adding to a vigorous seedling establishment under adverse nutrient and water seedbed conditions (Applicant Bienert, Gerd Patrick )
• Coordination Funds (Applicant Vetterlein, Doris )
• Effect of genetic perturbations on spatial heterogeneity and co-occurrence patterns in the maize mycorrhizosphere microbiota interacting with soil (Applicant Bucher, Marcel )
• Emerging effects of root hairs on plant scale soil water relations (Applicants Ahmed, Mutez Ali ;  Vanderborght, Jan )
• Functional microbial networks in soil aggregates and their adaptation to root properties and soil conditions (Applicant Tebbe, Ph.D., Christoph )
• Hot gradients & cold spots - spatial relation of carbon dispersal and microbial nutrient immobilization in the rhizosphere and consequences for plant nutrition (Applicants Gocke, Martina ;  Lehndorff, Eva )
• Microbial life in the rhizosphere: kinetics and visualization of the functions (Applicant Blagodatskaya, Evgenia )
• Micromechanics of root growth and physical habitat properties in the rhizosphere (Applicant Peth, Stephan )
• Modelling self-organisation in the rhizosphere (Applicant Schnepf, Andrea )
• Multiscale modeling with evolving microstructure: An approach to emergence in the rhizosphere via effective soil functions (Applicants Prechtel, Alexander ;  Ray, Nadja )
• Physiological drought stress imprints related to root exudation in the rhizosphere (Applicant Wimmer, Monika )
• Relevance of root growth and related soil structure formation for spatiotemporal patterns of chemical and biological properties and emergent system functions (Applicants Mikutta, Robert ;  Schlüter, Steffen ;  Vetterlein, Doris )
• Rhizosphere functions in plant water uptake: Mechanistic link between carbon and water fluxes in the plant-soil system (Applicants Holz, Ph.D., Maire ;  Pausch, Johanna ;  Zare, Mohsen )
• Root hair driven rhizosphere microbiome assemblage and functional feedback on host plants (Applicant Hochholdinger, Frank )
• Spatial and temporal analysis of maize root gene expression to elucidate how the maize interacts with the rhizosphere microbiome and the environment (Applicant Tarkka, Mika )
• Spatial organization of the liquid phase in the rhizosphere (Applicants Carminati, Andrea ;  Schlüter, Steffen )
• Spatio-temporal pattern of root exudation and enzyme activities in the rhizosphere (Applicants Razavi, Bahar S. ;  Spielvogel, Sandra )
• Spatiotemporal organization of the rhizosphere microbiome shaped by external drivers (Applicants Smalla, Kornelia ;  Yim, Bunlong )
• Spatiotemporal plasticity of carbon allocation and rhizodeposition in the maize root system and its impact on the rhizosphere microbiome (Applicants Knief, Claudia ;  Koller, Robert )
• Supplement for compensation of additional construction costs for the central plot experiment of PP 2089 at the field station Bad Lauchstädt (Applicant Vetterlein, Doris )
• The legacy of rhizosphere: how multi-year root activity fosters soil structure formation and the buildup of soil organic matter (Applicants Kögel-Knabner, Ingrid ;  Müller, Carsten Werner )
• The mystery of root exudation 2 – How do environmental changes affect root exudation? (Applicant Oburger, Eva )
• The protist microbiota of maize and their functional roles for the self-organization of the rhizosphere bacterial microbiome (ProtistBiome II) (Applicants Bonkowski, Michael ;  Edelmann, Hans Georg )
• The role of self-assembling of root mucilage for the formation of spatiotemporal wettability pattern in the rhizosphere (Applicants Diehl, Dörte ;  Kröner, Eva ;  Schaumann, Gabriele )

• Spokesperson: Professorin Dr. Doris Vetterlein