000188143 001__ 188143
000188143 005__ 20210129215137.0
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000188143 0247_ $$2ISSN$$a1866-1793
000188143 020__ $$a978-3-95806-021-0
000188143 037__ $$aFZJ-2015-01604
000188143 041__ $$aEnglish
000188143 1001_ $$0P:(DE-Juel1)141756$$aSchmittgen, Simone$$b0$$eCorresponding Author$$gfemale$$ufzj
000188143 245__ $$aEffects of Cercospora leaf spot disease on sugar beet genotypes with contrasting disease susceptibility$$f2015-12-01
000188143 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2015
000188143 300__ $$a121 S.
000188143 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1426168475_7587
000188143 3367_ $$02$$2EndNote$$aThesis
000188143 3367_ $$2DRIVER$$adoctoralThesis
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000188143 3367_ $$2ORCID$$aDISSERTATION
000188143 4900_ $$aSchriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment$$v244
000188143 502__ $$aUniversität Düsseldorf, Diss., 2014$$bDr.$$cUniversität Düsseldorf$$d2014
000188143 520__ $$aThe fungal pathogen Cercospora beticola causes the most destructive foliar diseas eof sugar beet, namely Cercospora leaf spot (CLS), which results in economically important yield losses. Current breeding efforts aim at developing sugar beet lines with lower fungal susceptibility as well as high productivity to ensure reduced fungicide applications in the context of integrated pest management. However, the main challenge remains to select sugar beet genotypes that produce the required yield quality and quantity, and to quantify their defense ability. Well-established visual disease scoring can be supported and supplemented by new techniques that enable earlier disease detection and genotype resistance classification. In this thesis, visual disease scoring was combined with novel invasive and non-invasive techniques toanalyze shoot and root disease responses to Cercospora infection. The fungal growth within the sugar beet leaf tissue was quantified using molecular analysis of the fungal calmodulin gene. This allows for the pre-selection of resistant genotypes before disease symptoms were visible. It could be shown that plants with high susceptibility (HS) allowed a stronger fungal colonization in the leaf tissue than ones with low susceptibility (LS). These results correlated with the respective disease severity. The HS genotypes consistently displayed more severe disease symptoms than LS plants. In particular, the moderately susceptible (MS) genotype seemed to be a promising candidate according to its variable response indicating a more adaptable reaction to changing environmental conditions. Therefore, this MS genotype might produce more yield under low-to-moderate disease pressure compared with HS plants, which would be comparatively more strongly infected and deliver reduced yield. The cuticle forms a barrier between the plant and the environment and therefore provides resistance against pathogens. Cuticular wax may affect host-pathogen recognition and conidia adhesion on the leaf surface. In this study, LS plants werefound to contain larger amounts of cuticular waxes. Mature leaves, which showed reduced fungal colonization, also had higher wax levels than immature leaves. Further experiments are needed to investigate the precise role of sugar beet cuticular waxes on C. beticola infections.[...]
000188143 536__ $$0G:(DE-HGF)POF3-582$$a582 - Plant Science (POF3-582)$$cPOF3-582$$fPOF III$$x0
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000188143 773__ $$y2015
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