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Mechanisms of resistance of plants from the genus Coffea to abiotic stresses
Skřivánek, Jakub ; Konrádová, Hana (advisor) ; Tylová, Edita (referee)
The genus Coffea is so specific by its distribution, requirements for environmental conditions and economic importance for humans that it is increasingly being studied as a model plant material. The thesis in the form of literary research is worked out in the context of the emerging climatic changes in order to give a comprehensive overview of the physiological responses of plants of the genus Coffea to three abiotic stresses - heat, cold and drought. The partial goal was to compare the resistance to these stresses of two economically significant species - Coffea arabica and Coffea canephora. We cannot generally say which species is more resilient, it always depends on a particular stress. Essential parts of the reaction to these stresses have proved to be carbohydrate accumulation and content dynamics. Key words: carbohydrates, climate change, Coffea, drought, extreme temperatures, stress
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Response to repeated exposure to selected abiotic stress factors in two subspecies of olive
Skřivánek, Jakub ; Konrádová, Hana (advisor) ; Prášil, Ilja (referee)
Olive tree (Olea europaea L.) is one of the world's oldest domesticated crops, a long-living tree capable to of withstand periods of high temperatures with limited water supply, deteriorated soil conditions, but also exposure to freezing temperatures during winters. The work is focused on the characterization of stress responses of olives to selected stress factors (drought, salinity, cold) at the level of antioxidant systems and aims to answer the question whether the nature of these responses changes due to repeated exposure to the stress factor. In many plants, an important component of the stress response is the adaptation of carbohydrate balance, including changes in the total carbohydrate content as well as in their spectrum. Due to the potential of soluble carbohydrates to quench free radicals and due to the diversity of the olive carbohydrate spectrum, special attention has been paid to the study of accumulation of individual groups of carbohydrates with protective potential. We have optimized experimental in vitro cultivation conditions for two subspecies of olive tree - domesticated (Picual cultivar) and wild one (ssp. laperrinei). It was impossible to find conditions ensuring satisfactory growth of the photoautotrophic culture. In experiments simulating the water shortage by adding PEG...
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Mechanisms of resistance of plants from the genus Coffea to abiotic stresses
Skřivánek, Jakub ; Konrádová, Hana (advisor) ; Tylová, Edita (referee)
The genus Coffea is so specific by its distribution, requirements for environmental conditions and economic importance for humans that it is increasingly being studied as a model plant material. The thesis in the form of literary research is worked out in the context of the emerging climatic changes in order to give a comprehensive overview of the physiological responses of plants of the genus Coffea to three abiotic stresses - heat, cold and drought. The partial goal was to compare the resistance to these stresses of two economically significant species - Coffea arabica and Coffea canephora. We cannot generally say which species is more resilient, it always depends on a particular stress. Essential parts of the reaction to these stresses have proved to be carbohydrate accumulation and content dynamics. Key words: carbohydrates, climate change, Coffea, drought, extreme temperatures, stress
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Problematika využití alternativních pohonů automobilů
Skřivánek, Jakub
Thesis is focused on the issue of the use of alternative drives cars. The thesis is divided into three parts. The first part discusses the current state of alternative propulsion cars. The second part is the description and analysis of selected types of propulsion. Final part deals with the overall ranking of alternative propulsion, their advantages and disadvantages when used in automobiles.
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