Wasting and death of deciduous trees, including oaks, is among the most serious problems today. Since 2003, the decline of oak trees in the Czech republic, among others, has been associated with the pathogenic fungus Phytophtora plurivora causing serious damage to root systems, which can lead to insufficient transport of water to transpiring leaves. The thesis is partly built on my Bachelor's thesis and includes two experiments. The objective of the first experiment,based on anatomical investigations, was to determine a theoretical maximum flow of water in the sapwood in oak seedlings. The goal of the second experiment,based on the temperature of the leaves, was to find out the functionality of the root system infected by the fungus Phytophthora plurivora. If the root system works, the transpiration is not disrupted and the leaf is cooler. The results of the first experiment give us evidence that the seedlings infected by the fungus Phytophthora plurivora are of the lower hydraulic conductivity and the lower theoretical maximum flow of water in the sapwood. The oak seedlings inoculated by the fungus Phytophthora plurivora compared with the control seedlings had smaller area of the vessels lumina, maximum theoretical flow of water in the sapwood, theoretical hydraulic conductivity, number of the vessel elements, maximum and minimum diameter of the vessel elements. In contrast, the inoculated seedlings had greater specific hydraulic conductivity and specific flow of water in the sapwood. The disruption of the root system by the fungus Phytophthora was demonstrated by 1°C higher temperature in the inoculated seedlings leaves.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:179768 |
| Date | January 2014 |
| Creators | Sedláčková, Veronika |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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