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Resistance of cole vegetable cultivars against Plasmodiophora brassicae pathotypes in Czech Republic
Zacharová, Lea ; Kazda, Jan (advisor) ; Gerhard, Gerhard (referee)
Clubroot disease of crucifer plants is caused by a pathogen Plasmodiophora brassicae (Wor.). It is counted among the most common and most serious diseases that attack not only rape, but also, for example, head cabbage, cauliflower, broccoli and other kinds of cabbage vegetables.
Plasmodiophora brassicae is descirebed as a very durable and well-developed body in this thesis. Physical, chemical and biological components of the soil environment are in the thesis associated with an effect on survival, growth and reproduction of this microbe. Obviously, Plasmodiophora's brassicae successfulness is given due to its resting spores and because of them the microbe is able to survive in a soil for years.
The experimental part of my thesis is focused on a testing of resistance of selected cultivars against Plasmodiophora brassicae. Each variety were grown under the control within conditions in the greenhouse. To evaluate the degree of a damage of the plants scale of Buzacki (1975), Strelkov et al. (2007) were applied, the index of an invasion was calculated based on these scales.
Cultivars were exposed to a pathotype 6 and as a control variety was used the cultivar Granaat. The results had shown the most susceptible respond of a cultivar red cabbage F1 Loder and other varieties tested had confirmed their resistance to Plasmodiophora brassicae.
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