Plant N nutrition is one of my main interests. Plants have evolved various systems for uptake of
inorganic and organic nitrogen to cope with heterogeneous N availability in the soil. During my
PhD studies, we found that roots of numerous plant species can exude proteases in sterile cultures. These enzymes can be used to create a pool of accessible N.
After PhD graduation, I wanted to get a broader view on the factors affecting N availability to
plants. I was fascinated by plant secondary metabolites and their influence on N cycle in soil. I
focused on tannins, because of their high potential to significantly affect N cycle in soil. I managed to get a position in 4-year project in Metla, Finland. Our results during this project suggest for example that tannins can precipitate not only proteins (a common belief), but also other organic N-containing compounds.
In 2013 I have started my own project funded by Emil Aaltonen Foundation.