|
|
The effect of invasive and native plants on abiotic and biotic soil properties
Hanzelková, Věra ; Aldorfová, Anna (advisor) ; Sudová, Radka (referee)
Invasive plants represent an important topic of study in current ecology because of their effects on whole ecosystems. The plants interact with the soil including soil biota, with the other plants in the community and with other organisms, eg. herbivores. Invasive plants often differ from non- invasive plants in nutrient utilization and can thus affect soil pH as well. They may also differ in the way they interact with mycorrhizal fungi that help the plants with nutrient uptake. In this study, the effect of invasive and native plants on soil properties is compared. Congeneric pairs of species, where one species is native and the other invasive, are compared. The native species are chosen so that they are dominant and therefore comparable to the invasive plants in the new environment. The evaluated soil properties are pH value and content of elemental nutrients from abiotic properties, and the amount of mycorrhizal fungi propagules and their spreading rate in soil from the biotic properties. In this study, the invasive and native plants differ only in the content of exchangeable phosphorus and potassium. Content of these two nutrients and one of the indicators of mycorrhizal fungi differ within the pairs of species as well. For most soil properties, the genus of the plant plays the main role, not...
|
|
|
The effect of invasive and native plants on abiotic and biotic soil properties
Hanzelková, Věra ; Aldorfová, Anna (advisor) ; Sudová, Radka (referee)
Invasive plants represent an important topic of study in current ecology because of their effects on whole ecosystems. The plants interact with the soil including soil biota, with the other plants in the community and with other organisms, eg. herbivores. Invasive plants often differ from non- invasive plants in nutrient utilization and can thus affect soil pH as well. They may also differ in the way they interact with mycorrhizal fungi that help the plants with nutrient uptake. In this study, the effect of invasive and native plants on soil properties is compared. Congeneric pairs of species, where one species is native and the other invasive, are compared. The native species are chosen so that they are dominant and therefore comparable to the invasive plants in the new environment. The evaluated soil properties are pH value and content of elemental nutrients from abiotic properties, and the amount of mycorrhizal fungi propagules and their spreading rate in soil from the biotic properties. In this study, the invasive and native plants differ only in the content of exchangeable phosphorus and potassium. Content of these two nutrients and one of the indicators of mycorrhizal fungi differ within the pairs of species as well. For most soil properties, the genus of the plant plays the main role, not...
|
|
| |
|
|
The role of arbuscular mycorrhizal symbiosis in plant performance under the specific edaphic conditions of serpentine soils
Doubková, Pavla ; Sudová, Radka (advisor) ; Baláž, Milan (referee) ; Gryndler, Milan (referee)
P. Doubková: The role of arbuscular mycorrhizal symbiosis in plant performance under the specific edaphic conditions of serpentine soils Summary Serpentine soils represent a unique environment characterized by unfavourable physicochemical properties involving low calcium to magnesium ratio, increased concentrations of heavy metals, often also deficiencies of essential macronutrients, and low water-holding capacity. Under these adverse conditions, a considerable potential of arbuscular mycorrhizal fungi (AMF) to promote plant growth was hypothesized due to the importance of arbuscular mycorrhizal (AM) symbiosis for plant nutrition and alleviation of various types of abiotic stress. On a model host plant species, Knautia arvensis (Dipsacaceae), we examined: i) occurrence of AM symbiosis and species richness and composition of the native AMF communities; ii) role of AM symbiosis in plant growth, element uptake and drought stress tolerance; iii) edaphic differentiation in plant populations or in AMF symbionts under serpentine vs non-serpentine conditions. Generally, K. arvensis plants showed lower frequency of mycorrhizal root colonization at serpentine compared to the non-serpentine sites. Adjacent serpentine and non-serpentine populations also differed in AMF species assemblages colonizing their roots. Both,...
|
|
| |
guest ::
RSS feed.