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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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Resource sharing in clonal plants - a review of labelling studies
Nováková, Tereza Anna ; Duchoslavová, Jana (advisor) ; Weiser, Martin (referee)
Clonal plants are characterised by their ability to reproduce without sexual reproduction. This is done by the formation of daughter rhizomes or ramets. By maintaining a functional link between them, ramets can share information and resources. The effect of sharing on the growth of clonal plants by sharing can be investigated using biomass experiments. To follow the movement of substances in more detail, labelled substances are used. I will discuss the work on tagging substances and recording their translocation in this thesis. These are carbon, water, nitrogen, phosphorus and calcium. The translocation of substances appears in many cases to be in the direction from the parent ramet to the daughter ramet, but there are plants translocating in the opposite direction. This is influenced by many factors such as plant species, anatomical structure, the age of the ramets and their current needs, as well as abiotic factors and the mobility of the particular element. Water as a carrier medium for minerals may also indicate some dependence of one on the other during translocation. In the future, it would be useful to add comprehensive information on sharing in individual species. Information on how sharing changes during ontogeny, multi-element clonal fragments and tracking of multiple elements in a plant...
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Clonal integration of Agrostis stolonifera in heterogeneous soil environment
Duchoslavová, Jana ; Weiser, Martin (advisor) ; Klimešová, Jitka (referee)
Clonal plants may be able to cope with spatial heterogeneity due to the physiological integration of ramets. Previous studies demonstrated that benefits of clonal integration increase with patch contrast between individual ramets. However, the same magnitude of contrast may be perceived differently in rich and poor environments. According to the theoretical work of Caraco and Kelly (1991), I expected these benefits to be the greatest in overall poor conditions and high between-patch contrast. To test this hypothesis, I conducted experiments with pairs of ramets of a stoloniferous grass, Agrostis stolonifera, grown in variously nutrient rich conditions. The experiment with pairs of ramet of similar developmental age showed only very weak effect of integration on growth of ramets, although integration significantly improved survival of ramets and also affected root-shoot ratio of ramets. Nevertheless, there were considerable benefits of integration in the experiment with developmentally older mother ramets and their daughter ramets. Contrary to the predictions, the benefits of integration were bigger in rich conditions and they decreased with increasing between-patch contrast. In addition, effect of integration on root-shoot ratio of ramets was opposite to the expected specialization for acquisition...
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CRM in company Pro Gyn s.r.o.
Duchoslavová, Jana ; Plášková, Alena (advisor) ; Šklíbová, Jana (referee)
My diploma work is about philosophy of CRM which is connecting tools for good quality customer care, insists on propriety and process efficiency, quality of staff and usage of IT technologies for recording all important facts which can have impact on relationship. Because of this is implementation of CRM suitable for health care as well. In my work deal with rules of process funciton CRM to activity of private gynecologist clinic. My aim is improve relation between company and consumer.
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