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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Růstová a metabolická odezva okřehku menšího (Lemna minor L.) na polycyklický aromatický uhlovodík
 Hrušková, Zuzana
Polycyclic aromatic hydrocarbons (PAHs) are ranked among the organic compounds with long-term permanence pollute the environment. The presence of PAHs react particularly aquatic plants. Duckweed (Lemna minor L.), water plant characterized in that it is exposed to foreign substances significant portion of his body, is a suitable model for the study of plant developmental and metabolic responses to the presence of polycyclic aromatic hydrocarbons. The aim of the thesis was to observe developmental and metabolic responses duckweed on the effect of polycyclic aromatic hydrocarbon fluoranthene. For 21 days were observed in four concentrations of fluoranthene, which accounted for commonly occurring (0.1 and 0.5 mg FLT / l) and slightly increased (1 and 5 mg FLT / L) concentrations of fluoranthene, metabolic and bioenergetic response. We were also observed growth and developmental changes and changes in the content of phytohormones. The study was focused on plant morphology. The results of this work, was evident that the presence of FLT has a significant impact on the appearance and production plants. It was also demonstrated a significant negative impact on the growth parameters. Fluoranthene demonstrated significant effects on the production of plant hormones.
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Vliv fluoranthenu na růstové a vývojové procesy okřehku menšího (Lemna minor L.)
 Hrušková, Zuzana
Polycyclic aromatic hydrocarbons (PAHs) are considered persistent organic pollutants because of the long persistence in the environment. The presence of PAHs significantly responds aquatic plant Lemna minor L. reduction of its growth, and thus represents a bioindicator of organic load of the aquatic environment. The aim of this thesis was to evaluate the influence of fluoranthene on growth and developmental processes Lemna minor L. During the 21 days were observed at several concentrations of fluoranthene (0.1, 0.5, 1 and 5 mg / l) growth and viability of plants, morphological and anatomical changes and growth parameters. We also investigated the ability of plant production and changes in the content of phytohormones (cytokinins, ethylene, ABA). The results showed that fluoranthene had a significant effect on the appearance of plants and production of biomass, specific leaf area and leaf dry matter content. The production capabilities were no significant adverse effects. Due fluoranthene increased production of ethylene, and abscisic acid formation in plants duckweed. After 21 days of culture was observed in the plants treated with low concentrations of fluoranthene to synthesize iP, iPR and Z.
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