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Influence of temperature on the shifts in sexuality of gynodioecious species Stellaria graminea (Caryophyllaceae)
Krtilová, Eliška ; Slovák, Marek (advisor) ; Macková, Lenka (referee)
Sexual polymorphisms represent an essential phenomenon in the evolution and reproduction of flowering plants. One of the types of sexual polymorphisms is gynodioecy, a phenomenon in which a plant species forms morphologically and functionally hermaphrodite, but also female individuals. However, the stability of sexuality expression of both types can be influenced by environmental factors, what might, finally, lead to shifts in sexuality (from hermaphrodites to females and vice versa). These changes are often very dynamic and can have a significant positive but also negative effect on genetic variability and overall fitness of the species. The main content of the work will be the elaboration of a research on the given topic which will contain chapters focused on sexual polymorphisms in flowering plants, gynodioecy, the influence of environmental factors on the lability of sexual expression and its effects on genetic variability and overall survival of species. An important part will also be the inference of the potential impact of climate change on fitness and survival of sexually polymorphic plant species. The theoretical part of the work will also focus on the model species selected for subsequent master's thesis, specifically Stellaria graminea. It is a perennial polyploid species inhabiting the...
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