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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Hormonal responses to cold stress
 Šturma, Vít ; Vaňková, Radomíra (advisor) ; Tylová, Edita (referee)
Low temperatures are an increasingly common stress factor for plants. Sudden and intense temperature fluctuations are thus a serious cause for lower crop yields. For this reason, it is important to understand what mechanisms are used by plants to defend themselves against damage caused by cold and freezing. An important component of this defence is represented by plant hormones, phytohormones, which create a complex network of signalling pathways. Phytohormones then control via their signalling pathways plant responses to cold stress. A few phytohormones affect the plant ability to cope with the cold stress, and the interactions among all these phytohormones are important for an efficient response to cold and freezing. Recently, research has revealed that the complex signalling network has a greater impact than previously thought. The phytohormone research in relation to cold stress responses is attracting more and more attention. The main aim of this thesis is to summarize the current knowledge on the role of phytohormones in the responses to cold stress. The thesis describes the signalling pathways of individual phytohormones and clarifies how the components of these pathways are involved in the response to cold stress. Also, the dynamics of phytohormone levels and signalling components in...
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Hodnocení průběhu ztrát masa v průběhu skladování
 WNUK, Michal
The aim of this study was to evaluate weight losses of pork meat during storage, especially during the chilling proces 24 hours after slaughter. In the theoretical part there are described the history of the origin and development of Prestice black-pied pig, the chemical composition of meat, slaughtering and chilling. The practical part dealt with the evaluation of weight losses in pig carcasses after twenty four hours of chilling. Data for this study was obtained from the carcasses of Prestice black-pied pig breed.
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