Professor of Phytopathology
- Division: Plant Pathology
- Room: 22-101
- Phone: +49 631 205 2402
- Fax: +49 631 205 4716
- Email: hahn[at]biologie.uni-kl.de
1986: Promotion at Federal Institute of Technology (ETH), Zurich; Switzerland
1986-1987: Postdoc, Federal Institute of Technology (H. Hennecke lab)
1987-1989: Postdoc, Stanford University (USA) (V. Walbot lab)
1989-1990: Postdoc, Max Plack Institute, Köln (K. Hahlbrock lab)
1990-2000: Postdoc, Konstanz University (K. Mendgen lab)
since 2000: Professor of Plant Pathology, Kaiserslautern University
Major Research Interest:
We are studying the infection mechanisms, i.e. the weapons of plant pathogenic fungi in order to develop new strategies to control them in the field. Our main research object is the grey mold fungus Botrytis cinerea that causes great economic losses in many fruit and vegetable crops, e.g. grapevine and strawberries. We study perception and signaling mechanisms and the resulting physiological responses related to spore germination and early stages of host infection. In addition, we investigate mutational mechanisms of multiple fungicide resistance in the field. Depending on the host plant and on fungicide treatments, field populations are genetically diverse and form separate (sub-) species. We want to use this knowledge for improved protection of plants against grey mould.
Selected Recent Publications:
Mernke D, Dahm S, Walker A-S, Lalève A, Fillinger S, Leroch M, Hahn M (2011). Two promoter rearrangements in a drug efflux transporter gene are responsible for the appearance and spread of multidrug resistance phenotype MDR2 in B. cinerea isolates in French and German vineyards. Phytopathology 101, 1176-1183.
Amselem et al. (2011) Genomic analysis of the necrotrophic fungal pathogens Sclerotinia sclerotiorum and Botrytis cinerea. PLoS Genet. 2011 August; 7(8): e1002230.
Mosbach A, Leroch M, Mendgen KW, Hahn M (2011): Lack of evidence for a role of hydrophobins in conferring surface hydrophobicity to conidia and hyphae of Botrytis cinerea. BMC Microbiol 11, 10.
Leroch M, Mernke D, Koppenhoefer D, Schneider P, Mosbach A, Doehlemann G, Hahn M (2011). Living colors in the gray mold pathogen Botrytis cinerea: Codon-optimized genes encoding green fluorescent protein and mCherry, which exhibit bright fluorescence. Appl Environ Microbiol 77, 2877-2897.
Schamber A, Leroch M, Diwo J, Mendgen K, Hahn M (2010). The role of mitogen-activated protein (MAP) kinase signalling components and the Ste12 transcription factor in germination and pathogenicity of Botrytis cinerea. Mol Plant Pathol 11, 105-119.
Kretschmer M, Leroch M, Mosbach A, Walker A-S, Fillinger S, Mernke D, Schoonbeek H-J, Pradier J-M, Leroux P, De Waard MA, Hahn M (2009). Fungicide-driven evolution and molecular basis of multidrug resistance in field populations of the grey mould fungus Botrytis cinerea. PLoS Pathog 5(12): e1000696.
Doehlemann, G., Patrick Berndt, P. and Hahn, M. (2006) Different signalling pathways involving a G?3 protein, cAMP and a MAP kinase control germination of Botrytis cinerea conidia. Mol Microbiol 59: 821-835.