|
|
The effect of spoil-mining subtrate with heavy metal contents on leaf physiological status with emphasis on phenolics content.
Kovářová, Monika ; Lhotáková, Zuzana (advisor) ; Soudek, Petr (referee)
5 ABSTRACT Heavy metals abundance in the environment increases via natural and anthropogenic processes, mainly mining and industrial activities. Spoil mine substrates of the Sokolovsko Region characteristic by high heavy metal contents are recultivated by tree planting, e.g. of Scots pine (Pinus sylvestris L.). The diploma thesis is a part of a larger project aimed on interpretation of hyperspectral remote sensing data for monitoring of vegetation physiological state. That is why it is focused on non-specific indicators of stress by heavy metals, which can be detected by foliage spectral analyses. The experimental part of thesis comprises 1) field research on P. sylvestris needles and 2) model pot experiments on tobacco plants. Field research was accomplished in 2009 and 2010 on one control locality and three spoil mine banks localities with different heavy metal soil contents (Hg, As and Cu). Photosynthetic pigments', phenolic compounds'and lignin contents were determined spectrophotometrically. Model pot experiments with tobacco plants (Nicotiana tabacum cv. Samsun) - pilot experiment and experiments 1 and 2 using the spoil mine substrates in 2011 and experiment 3 in 2012 also included treatments with different mercury concentration in irrigation (10 and 15 ppm HgCl2). Gasometric measurements (net...
|
|
|
The effect of spoil-mining subtrate with heavy metal contents on leaf physiological status with emphasis on phenolics content.
Kovářová, Monika ; Lhotáková, Zuzana (advisor) ; Soudek, Petr (referee)
5 ABSTRACT Heavy metals abundance in the environment increases via natural and anthropogenic processes, mainly mining and industrial activities. Spoil mine substrates of the Sokolovsko Region characteristic by high heavy metal contents are recultivated by tree planting, e.g. of Scots pine (Pinus sylvestris L.). The diploma thesis is a part of a larger project aimed on interpretation of hyperspectral remote sensing data for monitoring of vegetation physiological state. That is why it is focused on non-specific indicators of stress by heavy metals, which can be detected by foliage spectral analyses. The experimental part of thesis comprises 1) field research on P. sylvestris needles and 2) model pot experiments on tobacco plants. Field research was accomplished in 2009 and 2010 on one control locality and three spoil mine banks localities with different heavy metal soil contents (Hg, As and Cu). Photosynthetic pigments', phenolic compounds'and lignin contents were determined spectrophotometrically. Model pot experiments with tobacco plants (Nicotiana tabacum cv. Samsun) - pilot experiment and experiments 1 and 2 using the spoil mine substrates in 2011 and experiment 3 in 2012 also included treatments with different mercury concentration in irrigation (10 and 15 ppm HgCl2). Gasometric measurements (net...
|
|
|
How do plants manage to survive on toxic spoil-mining sites? Physiological and structural properties of plants on substrates with high As and Hg contents
Kovářová, Monika ; Albrechtová, Jana (advisor) ; Soudek, Petr (referee)
The heavy metals contamination of environment represents a worldwide problem lately. Heavy metals cause harmful effects not only to plants, but also to other organisms. Throught their acumulation in plant biomass, heavy metals enter a food chain and could negatively influence the human health. The impact of heavy metals on plants and their defence mechanisms against toxicity of heavy metals have been in focus of plant physiology and ecology research for decades. Importance of this topic arises from plant role in environment, ecosystem services and in human nutrition. Investigation in proces and mechanisms of heavy metal hyperacumulation in plants offer progress in fytoremediation and genetic engineering. The experiments on agricultural crops show how heavy metals enter the food chain and how they affect the crop yield. The aim of this thesis is to summarize information about heavy metals' effects on plants. The thesis is focused on arsenic and mercury, because the Czech Republic have also problem with heavy metals contamination and these two metals occur in high concentration in the spoil banks and soils adjacent to the lignite mining areas of Sokolovsko. The spoil banks with heavy metal content have to be revegatated, thus, the topic of their effect on plants is of high importance. In the first part of the...
|
|
| |
guest ::
RSS feed.