P9 - LCM-Rhizomics
Root-structure and soil-texture dependent microbial self-organization in the rhizosphere and in specific cell-types of the endorhizosphere of maize
Plant roots interact with their environment by secreting exudates from the endorhizosphere (all inner root tissues) to the rhizosphere, which is the narrow soil volume directly influenced by the properties and activities of plant roots. Microorganisms are the central component interacting between endorhizosphere and rhizosphere. A cascade of feedback loops between roots and soil are shaped by the spatial variability and organization of the root microbiota.
Under natural soil conditions, emerging lateral roots and root hairs are important sites for the release of exudates to select soil-inhabiting microorganisms in the rhizosphere. To this end, the mutants roothairless 3 (rth3) with impaired root hair formation and lateralrootless 1 (lrt1) with impaired lateral root formation will be used to functionally link the genetic defects and the microbiota interruption in both the endorhizosphere and the rhizosphere of the maize root. Moreover, two soil types (loamy sand and silt loam) will be introduced to explore the environmental effects on root-soil interaction from endorhizosphere to rhizosphere.
The overall goal of this project is to better understand the role of soil-grown maize roots and their exudates in the self-organization of the bacterial and fungal microbiomes in the rhizosphere and endorhizosphere.
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