Gerhard Schmied, M.Sc.

Current research project:

epiSOMA – Causes and consequences of epigenetic diversity in trees (2022 – 2025)

Trees are emerging as powerful ‘model systems’ to investigate epimutational processes in plants. Given their exceptional longevity, trees act as natural (epi)mutation accumulation systems and permit unprecedented insights into the dynamics, mitotic stability, and functional impact of spontaneous epimutations over time-frames that have been inaccessible to previous prospective studies. Focusing on European beech (Fagus sylvatica) as a model, we will combine unique experimental tree resources, proximate-sensing technology, multi-omic assays, and novel analytical tools to quantify how somatic epimutations alongside micro-environmental factors shape epigenetic and functional diversity within the 3D-topology of a tree, and how this intra-tree variation affects seeds and seedling performance in the next generation.

The BMBF funded project is coordinated by Prof. Frank Johannes (TUM), and in collaboration with Prof. Lars Opgenoorth (Phillipps- Universität Marburg) and  Prof. Katrin Heer (Albert-Ludwigs Universität Freiburg).

Schmied, G., Pretzsch, H., Ambs, D., Uhl, E., Schmucker, J., Faeth, J., Biber, P., Hoffmann, Y-D., Seho, M., Mellert, K.H., Hilmers, T. (2023): Rapid beech decline under recurrent drought stress: Individual neighborhood structure and soil properties matter. Forest Ecology and Management 545, 121305, doi.org/10.1016/j.foreco.2023.121305

Schmied, G., Hilmers, T., Mellert, K-H., Uhl, E., Buness, V., Ambs, D., Steckel, M., Biber, P., Seho, M., Hoffmann, Y-D., Pretzsch, H. (2023): Nutrient regime modulates drought response patterns of three temperate tree species. Science of the Total Environment 868, 161601 (p. 15) doi.org/10.1016/j.scitotenv.2023.161601

Pretzsch, H., Ahmed, S., Jacobs, M., Schmied, G., Hilmers, T. (2022): Linking crown structure with tree ring pattern: methodological considerations and proof of concept. Trees. doi.org/10.1007/s00468-022-02297-x

Hilmers, T., Leroy, B.M.L., Bae, S., Hahn, A., Hochrein, S., Jacobs, M., Lemme, H., Mueller, J., Schmied, G., Weisser, W., Pretzsch, H. (2023): Growth response of oaks to insect defoliation: Immediate and intermediate perspectives. Forest Ecology and Management 549, 121465, doi.org/10.1016/j.foreco.2023.121465