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Využití poloparazitických rostlin v sadech a vinohradech
Borowiecki, Ondřej
Hemiparasitic species Rhinanthus minor and Rhinanthus alectorolophus are used in meadow and grassland restoration, where they regulate dominant species by parasitation. This bachelor’s thesis is focused on usage of Rhinanthus minor and Rhinanthus alectorolophus in orchards, and Melampyrum arvense in vineyards and their potential benefits in orchard and vineyard greening. A summary of physiology and ecology of hemiparasitic plants including definition of hemiparasitism is presented. Possible impacts on community where hemiparasites occur are mentioned as well. Agricultural technologies used in orchards and vineyards are summarized, with focus on the most commonly used greening mixtures. Lastly, hemiparasitic growth on orchard plots is evaluated and a greening mixture with hemiparasitic usage in orchards and vineyards is proposed.
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Effects of abiotic factors on hemiparasitic plants
SVĚTLÍKOVÁ, Petra
This thesis focuses on the ecophysiology of hemiparasitic plants. In its introduction, I review our understanding of abiotic factor effects on root and stem hemiparasites and highlight gaps in our knowledge which would be interesting to explore in future. The following four chapters are first author articles that investigate responses of selected root hemiparasites from the rhinanthoid clade of Orobanchaceae to varying availability of abiotic factors such as light, water, and mineral nutrients.
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Mathematical modelling of the population dynamics of hemiparasitic plants
SVĚTLÍKOVÁ, Petra
The hemiparasite-host interaction is rather complex, acting as parasitism belowground and as competition for light aboveground. Studies modelling this interaction are rare. The most recent model of the hemiparasite-host interaction was developed from the well-known Rosenzweig-MacArthur predator-prey model by Fibich et al. (2010). Here, I modied the light availability function of the model into a more general form and examined the hemiparasite-host coexistence along a productivity gradient of the environment. The behaviour of presented and analyzed model was shown to depend particularly on parameter g scaling light availability for hemiparasites at high host biomasses. While it suggested the host-hemiparasite coexistence only at intermediate productivities under low g, species could coexist even at high productivities under higher g.
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Biology of hemiparasitic \kur{Melampyrum nemorosum}
ADAMEC, Vojtěch
The thesis reports distribution and important aspects of biology (host spectrum, effect of the species on plant community and basic ecophysioogical characteristics) of the endangered early ecotype of hemiparasitic plant Melampyrum nemorosum (Orobanchaceae) in the Czech Republic. Comparisons to the frequently occurring late ecotype are also emphasised where relevant.
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