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Imprint
Assessment of the pathogenicity of Alternaria alternata on carrot (Daucus carota L.)
Project
Project code: JKI-ZGO-08-4162
Contract period: 01.01.2013
- 31.12.2019
Purpose of research: Applied research
In commercial carrot production different Alternaria species may be pathogenic and cause dramatically yield and quality losses. The most important Alternaria diseases on carrots are leaf blight and black rot disease caused by A. dauci and A. radicina respectively. The improvement of disease resistance to these fungi could ensure sustainable product quality and stability of the yields. Additionally, the fungus A. alternata was observed very often in our own resistance research programme as well as under field and greenhouse conditions. Alternaria species produce phytotoxins during their pathogenesis and additionally, A. alternata release mycotoxins. The role of A. alternata on carrots as a weakness parasite or a pathogen is poorly understood. Therefore investigations will be done to determine the pathogenicity of A. alternata on carrot. In case A. alternata is pathogenic to carrots, epidemiology and symptom specificity will be investigated in relation to the other Alternaria species. A secondary aim is the examination of synergistic and / or antagonistic effects of mixed infections of the three Alternaria species. This information is essential for continuation an extensive resistance screening programme to A. dauci, A. radicina and possibly to include A. alternata. For the characterisation of interactions between the different Alternaria species well established methods will be used. Different approaches will be applied for the isolation and cultivation of the fungus, for immunological detection as well as for analysis of host pathogen interactions. Furthermore the advanced bioassays for A. dauci and A. radicina will be adapted to test the pathogenicity of A. alternata. Assessment of disease symptoms will be carried out with an established digital image analysis system. The research project will focused to generate knowledge about the role of A. alternata on carrot in relation to the known pathogenic species A. dauci and A. radicina. The results of investigations will be used to decide about the involvement of A. alternata in the resistance screening programme to Alternaria diseases in carrot.
Section overview
Subjects
- Plant Breeding
- Crop Protection
Framework programme
Funding programme
Excutive institution
Institute for Breeding Research on Horticultural Crops (JKI-ZG)
