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National Repository of Grey Literature 2 records found  Search took 0.00 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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Ověřování účinku fytohormonů na diferenciaci kořenů u dřevitých řízků podnoží jádrovin
 Pavlíček, Ondřej
This thesis deals with the propagation of pome rootstocks using hardwood cuttings. There was evaluated the effects of several factors on the overall effectiveness of this method. The tested rootstocks were OHxF types, Cydomalus, M 9 and M 2. The first part consists the information from literature sources about importance of rootstocks, influence of phytohormones and external conditions on root formation, characteristics of selected species rootstock and technological procedures used in experiments and in practice. In the second part describes the material and methods attempt thesis. The results are statistically processed and evaluated. The highest yield was achieved at apple rootstock M 9 and M 2. From the pear rootstocks the fell best Cydomalus and OHxF 333. Best affect yield product should Racine.
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