Plants do not live isolated, but in close interaction with beneficial and pathogenic microorganisms. This interaction has an effect on how plants control and share scarce, growth-limiting nutrients, such as metallic micro/oligonutrients (Fe, Cu, Zn, Mo,…). We are directing our efforts to address the following biological questions:
The González-Guerrero Lab
Research
Research Questions
How are metals specifically targeted to each specific metalloprotein?
From a few plasma membrane transporters metals must reach in a hierarchical manner thousands of different metalloproteins. However, how this is achieved in plants is not yet fully understood. To fill this gap, we are studying the metallochaperones that might be shuttling the metals from the plasma membrane transporters.
How are metals shared with nitrogen-fixing rhizobia within the nodule?
Symbiotic nitrogen fixation carried out by the endosymbiosis of rhizobia with legumes requires relatively large amounts of already scarce metals to synthesize many of the key enzymes involved in the process. These nutrients have to be provided by the host plant and limit nitrogen fixation rates. We are studying the transporters that mediate metal exchange as a mean to increase N-fixation rates and contribute towards the efforts of reducing the use of polluting nitrogen fertilizers by improving biological nitrogen fixation.
How do plants use metals to fend off pathogenic microorganisms?
Evidence in animals suggest that metals play a part in the innate immune response either by being sequestered, limiting access to growth-limiting nutrients, or by locally increasing their concentrations to toxic levels. We are currently studying how plants also use this strategy.
Our goals
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To have a complete view of how plant metal homeostasis modulates and is modulated by plant-microbe interactions, both when beneficial or prejudicial.
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To translate the results obtained to the private sector.
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To train researchers & technologists with skills in plant metal homeostasis and in plant-microbe interactions.
Research Projects
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Plants require transition metals (iron, copper, zinc,…) for most of their biological processes, from photosynthesis to seed production. However, they often grow in soils with low metal bioavailability. This has an impact on plant growth, crop yield, and…
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