PD Dr. Mika Tarkka
Plant beneficial micro-organisms
My scientific work is devoted to answering the question how soil microorganisms affect plant growth and stress resistance, and whether these interactions can be used to benefit plant health. In particular, my colleagues and I work with micro-organisms associated with pedunculate oak, and our models of biotic interactions include streptomycetes, fungal mutualists and pathogens. Our current work on ectomycorrhizal symbiosis assesses the physiology and molecular interactions from both the host plant’s and the symbiotic fungus’ point of view. While much of the current work focusses on genome regulation, my colleagues and I have also performed analyses on soil bacterial communities influencing plant and fungal resistance against parasites, and playing out in decomposition and nutrient mobilisation. My main motivation in this research field is to contribute to the assessment of the overall impact of microorganisms on plant health, and to assess the existing uses of microbes for improved plant production. Overall, I believe that combination of model systems with field work pave the way for a novel, more dynamic view on plant-microbe interactions.
The TrophinOak project investigates the interactions between endogenous rhythmic growth and biotic interactions at the levels of resource allocation and gene expression.
"Increasing the stress resistance of agricultural ecosystems through plant growth promoting rhizobacteria (PGPR) using winter wheat (Triticum L.) production as a case study"
Funded by DBU (20015/391) | Project term: 2016 - 2019 | PhD Student: Claudia Breitkreuz
Supervision by Dr. Mika Tarkka and Dr. Thomas Reitz
The PhytOakmeter platform was created by planting pedunculate oak DF159 trees along a geographic gradient in Europe. It used to investigate the adaptation of the oak trees and the associated organisms to different climates, soils, and land use types.
Global Change Experimental Facility (GCEF)
The GCEF is a field experiment at the UFZ research station Bad Lauchstädt, used for the investigation of the impacts of climate change and land use scenarios on ecosystem processes.
Complete lists of publications
Inhalt:Artikel in ISI-gelisteten Zeitschriften (46)
Artikel in anderen Zeitschriften (nicht ISI gelistet) (4)
Weiterführende Recherchen können Sie in unserem Publikationsverzeichnis durchführen.
Riedlinger J., Schrey S.D., Tarkka M.T., Hampp R., Kapur M., Fiedler H.P. (2006)
Auxofuran, a novel substance stimulating growth of fly agaric, produced by the mycorrhiza helper bacterium Streptomyces AcH 505.
Applied and Environmental Microbiology 72, 3550-3557. download
Tarkka M.T., Schrey S., Nehls U . (2006)
The alpha-tubulin gene AmTuba1: A marker for rapid mycelial growth in the ectomycorrhizal basidiomycete Amanita muscaria.
Current Genetics 49, 294-301. download
Schrey S.D., Schellhammer M., Ecke M., Hampp R., Tarkka M.T. (2005)
Mycorrhization helper bacterium Streptomyces AcH 505 induces differential gene expression in the ectomycorrhizal fungus Amanita muscaria.
New Phytologist 168, 205-216. download
Juuti J.T., Jokela S., Tarkka M.T., Paulin L., Lahdensalo J. (2005)
Two phylogenetically highly distinct beta-tubulin genes of the basidiomycete Suillus bovinus.
Current Genetics 47, 253-263.
Saarma K., Tarkka M.T., Itavaara M., Fagerstedt K.V. (2003)
Heat shock protein synthesis is induced by diethyl phthalate but not by di(2-ethylhexyl) phthalate in radish (Raphanus sativus).
Journal of Plant Physiology 160, 1001-1010.
Gorfer M., Tarkka M.T., Hanif M., Pardo A.G., Laitiainen E., Raudaskoski M. (2001)
Characterization of small GTPases Cdc42 and Rac and the relationship between Cdc42 and actin cytoskeleton in vegetative and ectomycorrhizal hyphae of Suillus bovinus.
Molecular Plant-Microbe Interactions 14, 135-144.
Tarkka M.T., Nyman T.A., Kalkkinen N., Raudaskoski M. (2001)
Scots pine expresses short root-specific peroxidases during development.
European Journal of Biochemistry 268, 86-92.
Tarkka M.T., Vasara R., Gorfer M., Raudaskoski M. (2000)
Molecular characterization of actin genes from homobasidiomycetes: two different actin genes from Schizophyllum commune and Suillus bovinus.
Gene 251, 27-35.
Tarkka M., Niini S.S., Raudaskoski M. (1998)
Developmentally regulated proteins during differentiation of root system and ectomycorrhiza in Scots pine (Pinus sylvestris) with Suillus bovinus.
Physiologia Plantarum 104, 449-455.
Niini S.S., Tarkka M.T., Raudaskoski M. (1996)
Tubulin and actin protein patterns in Scots pine (Pinus sylvestris) roots and developing ectomycorrhiza with Suillus bovinus.
Physiologia Plantarum 96, 186-192.
Nehls U., Zhang C., Tarkka M., Hampp R., Fladung M. (2006)
Investigation of horizontal gene transfer from transgenic aspen to ectomycorrhizal fungi.
In: Recent developments in tree transgenesis, Fladung M, Ewald D (eds), pp 323-333. Springer-Verlag
Tarkka M.T., Nehls U., Hampp R. (2005)
Physiology of Ectomycorrhiza (ECM).
Progress in Botany 66, 220-247.
Raudaskoski M., Tarkka M.T., Niini S.S. (2004)
Mycorrhizal development and cytoskeleton.
In: Plant Surface Microbiology, pp. 293-330. Springer-Verlag.
Raudaskoski M., Pardo A., Tarkka M., et al. (2001)
Small GTPases, cytoskeleton and signal transduction in filamentous homobasidiomycetes.
NATO Science Series I: 328, 123-136