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Importance of arbuscular mycorrhizal fungal communities for the growth of selected plant species on an abandonned field
Voříšková, Alena ; Janoušková, Martina (advisor) ; Gryndler, Milan (referee)
The thesis deals with the effect of arbuscular mycorrhiza (AM) on the growth of selected plant species at a locality in České středohoří. This locality is characterized by close neighborhood of a semi-natural dry grassland and a former field abandonned in the 1990s, typical for the mosaic of biotopes in the region. The study is based on previous findings that some plant species, which are common at the semi-natural dry grasslands, do not colonize the abandoned fields. As AM is an important factor affecting diversity and productivity of plant communities we hypothesized that this phenomenon could be related to changes in AM fungal communities at the abandoned field. The hyphothesis was tested in a greenhouse pot experiment with three taxonomically related pairs of plant species, always one species growing at the abandoned field and the second one not. Growth and phosphorus uptake of the plants was followed in soils of both biotopes after factorial inoculation with AM fungal communities from both biotopes. The experiment was complemented by description of AM fungal communities in the roots of six plant species pairs from the locality using terminal restriction fragment length polymorphism (T-RFLP). The greenhouse experiment revealed positive mycorrhizal response in all plant species, but the origin...
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Specificity between partners in arbuscular mycorrhizal symbiosis
Voříšková, Alena ; Janoušková, Martina (advisor) ; Püschel, David (referee)
Arbuscular mycorrhiza (AM) is a symbiotic interaction between vascular plants and arbuscular mycorrhizal fungi from phylum Glomeromycota. AM symbiosis is considered as a nonspecific interaction, because AM fungi are able to colonize roots of all plant species which are hosts for this type of symbiosis, nevertheless certain specific interactions exist between the partners. The specificity can be evident on the level of the formation of mycorrhiza, which means that different species of plants can vary in the composition of fungal community in their roots or AM fungi can differ in an ability of colonization and sporulation depending on host plant species. The specificity can also manifest as different functionality of the symbiosis in dependence on the particular partners affecting the mycorrhizal response of the host plants. All of these specific interactions can have an impact on the coexistence and diversity of plants in communities.
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Functioning of arbuscular mycorrhiza in relation to fungal community composition and environmental conditions
Voříšková, Alena ; Janoušková, Martina (advisor) ; Šmilauerová, Marie (referee) ; Kolařík, Miroslav (referee)
Arbuscular mycorrhizal (AM) symbiosis, a widespread plant-fungal relationship, is based on reciprocal resource exchange. The functioning of this fragile relationship balances on the scale from mutualism to parasitism, depending on the specific context. The thesis aims to interlink the functioning of AM symbiosis both with the composition of AM fungal communities and with different abiotic conditions. The thesis is divided into a methodological and a factual part and consists of three publications and one manuscript. All experiments were conducted in greenhouse conditions with medic (Medicago sp.) as host plant. Host plants were inoculated with single AM fungal species in Paper I and II, and with a synthetic AM fungal community of five species in Paper III and IV. The host plant identity, the amount of phosphorus (P) in substrate and the type of substrate played an important role for the achievement of mutualistic AM symbiosis, as demonstrated in Paper I. Paper II showed that mitochondrial and nuclear qPCR markers can be used alternatively for the quantification of particular AM fungal species. However, intraradical fungal biomass was better related to copy numbers of nuclear DNA than of mitochondrial DNA. The functioning of AM symbiosis was modulated by the availability of P, light and water,...
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Importance of arbuscular mycorrhizal fungal communities for the growth of selected plant species on an abandonned field
Voříšková, Alena ; Janoušková, Martina (advisor) ; Gryndler, Milan (referee)
The thesis deals with the effect of arbuscular mycorrhiza (AM) on the growth of selected plant species at a locality in České středohoří. This locality is characterized by close neighborhood of a semi-natural dry grassland and a former field abandonned in the 1990s, typical for the mosaic of biotopes in the region. The study is based on previous findings that some plant species, which are common at the semi-natural dry grasslands, do not colonize the abandoned fields. As AM is an important factor affecting diversity and productivity of plant communities we hypothesized that this phenomenon could be related to changes in AM fungal communities at the abandoned field. The hyphothesis was tested in a greenhouse pot experiment with three taxonomically related pairs of plant species, always one species growing at the abandoned field and the second one not. Growth and phosphorus uptake of the plants was followed in soils of both biotopes after factorial inoculation with AM fungal communities from both biotopes. The experiment was complemented by description of AM fungal communities in the roots of six plant species pairs from the locality using terminal restriction fragment length polymorphism (T-RFLP). The greenhouse experiment revealed positive mycorrhizal response in all plant species, but the origin...
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Specificity between partners in arbuscular mycorrhizal symbiosis
Voříšková, Alena ; Janoušková, Martina (advisor) ; Püschel, David (referee)
Arbuscular mycorrhiza (AM) is a symbiotic interaction between vascular plants and arbuscular mycorrhizal fungi from phylum Glomeromycota. AM symbiosis is considered as a nonspecific interaction, because AM fungi are able to colonize roots of all plant species which are hosts for this type of symbiosis, nevertheless certain specific interactions exist between the partners. The specificity can be evident on the level of the formation of mycorrhiza, which means that different species of plants can vary in the composition of fungal community in their roots or AM fungi can differ in an ability of colonization and sporulation depending on host plant species. The specificity can also manifest as different functionality of the symbiosis in dependence on the particular partners affecting the mycorrhizal response of the host plants. All of these specific interactions can have an impact on the coexistence and diversity of plants in communities.
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Merits of selected natural resource and its region development influence
VOŘÍŠKOVÁ, Alena
The topic of this thesis is the value of a selected natural resource and its influence on the region{\crq}s development. This thesis has been divided in two parts. The first part is theoretical and it defines natural resources and their evaluation. The theoretical part is concluded by information about regional politics and development. The practical part of this thesis consists of two areas. In the first one, I characterize South Bohemian region as well as Lipno reservoir. In the second one, I deal with the land prices in Lipno area and compare them to the land prices in the area around Orlik reservoir. The amount of the prices indicates differences in holiday resort values of these reservoirs and their contribution to the region{\crq}s development. The main goal of this work is to analyze, on the basis of natural resources{\crq} evaluation, the relationship between the natural resource value and economic development of the selected area of the South Bohemian region. Another significant goal is an elaboration of a survey of methods used in natural resources{\crq} evaluation, from the perspective of nonmarketable resources{\crq} evaluation as well as evaluation of any inmovable object that satisfies people{\crq}s needs. An important aim of the practical part of this thesis is a land price analysis of Lipno reservoir area. The last goal I have proposed to me is to compare the land prices around Lipno reservoir to those of Orlik reservoir. The value of an natural resource can be expressed in different ways, for example, in how much people, who use that holiday resort, esteem it. Considering the topic of my thesis, I have chosen an evaluation according to land prices. If a natural resource is valuable, then its value will be reflected in people{\crq}s willingness to pay for the possibility of living in its nearness. This is also obvious with Lipno reservoir, as the land prices there are much higher than the land prices in any other holiday resort situated near a water reservoir. Nevertheless, even here we can still find places, that have not been fully developped yet and which offer possibities of exploitation. Considering the above-mentioned findings and examples, it is obvious that Lipno water reservoir not only provides the South Bohemian region with incomes from tourisms but it also has a movable value of an ascending tendency. Despite its invaried long-time exploitation potential, its holiday resort function has caused recently, that Lipno area is being valued more and more. This tendency is reflected in the increasing prices of building estates near the reservoir, which indicates people{\crq}s willingness to pay more and more for a valuable holiday resource.
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