472380 Mechanisms and Adaptation of the Arabidopsis thaliana Root Microbiota in Iron Mobilization and Uptake from Iron-Limiting Environments
We have identified root-associated bacteria that promote the growth and development of Arabidopsis thaliana under conditions simulating low iron availability in vitro. These strains, which represent members within the phyla Proteobacteria and Bacteroidetes, are employed as models to investigate the mechanics facilitating plant iron acquisition by its microbiota. By applying reverse genetics and metabolomics, I investigate the role of the plant’s secondary metabolism in mediating plant-microbe signaling in the rhizosphere. In parallel, I investigate adaptation of the A. thaliana root microbiota to calcareous soils, which constitute approximately one-third of the world’s arable land. I will apply root-associated bacterial and fungal community profiling methods to determine adaptation in terms of community composition, and cross-reference these results with comparative genomics and plant growth promoting ability of a comprehensive rhizobacterial library derived from this soil type. Finally, I use a plant gnotobiotic system to investigate whether defined bacterial communities obtained from a calcareous soil uniquely display an ability to promote plant growth under iron-limiting conditions.
See more of this Group/Topical: Food, Pharmaceutical & Bioengineering Division