Tannins in aspen are important for growth and defense. However anthropogenic nutrient deposition may affect tannin levels, and thus the balance between growth and defense. Genotypes rich in tannins tend to grow taller in response to nitrogen enrichment, but tannin levels will decrease under fertilization, and fertilization potentially alter the above ground plant health status as well as below ground mycorrhiza association.
The current study is based on leaf and root sampling from aspen trees during the summer 2021. We use the TanAsp field in Vindeln as resource.
Techniques to establish tannin levels and biological above and below ground interactions include:
histology, DMACA-staining, microscopy, metabolomics and studies of gene expression.
In the project we have the capacity to invite one or two students to work on varied aspects of the project.
The students will have the possibility to add a 10 weeks (15hp) individual summer project study to their merits.
Supervisors: Benedicte Riber Albrectsen, Dept. of Plant Physiology, UMU
Judith Lundberg-Felten, Dept of Forest Genetics and Plant Physiology, SLU