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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Effect of pathogens on clonal plants
 Koděra, Ondřej ; Koubek, Tomáš (advisor) ; Duchoslavová, Jana (referee)
1 Abstract: More than half of Central Europe's plant species are capable of propagating vegetatively via clonal growth, many of them identifiable as some of the most common species. Clonal ecology has been studied mainly due to its positive influence on plant fitness; Less attention, however, has been dedicated to the cost of clonal growth which is directly connected to the pathogen's inner plant invasion and transmission. The existence of clonal growth enables both partners in the plant-pathogen interaction to create new life strategies differing from those created by infected nonclonal plants. Pathogens that infect plants with a strong lateral spread were selected for higher aggressivity in evolution. In turn, their effect is negative on survival, the creation of new ramets and also on the whole growth and development of the host. If the development of the clonal growth organs becomes faster than the growth of fungal hyphae, the ramets can escape the infection passively. The influence on the host is not only negative as the infected plant can perform stimulated clonal growth or compete with healthy plants to a more successful extent. The aims of this thesis are: to search and summarize all the available information concerning this specific plant-pathogen interaction; to discuss the unanswered questions...
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Ecological comparison of three closely related species from \kur{Myosotis palustris} group
 KOUTECKÁ, Eva
The study is focused on comparative ecology of three closely related species from Myosotis palustris group. Importance of various functional traits of individual species was evaluated experimentally in the greenhouse (germination experiments), in the pot experiment and in the reciprocal transplant field experiment. Germination, production of clonal structures and response to various environmental conditions (competition, moisture conditions, etc.) were studied. The experimental data are supplemented with an analysis of phytosociological relationships of the studied species.
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