Browsing by Author "Czaja, Monika"

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Access status: Open Access ,
Influence of platinum ions on phenolic compounds in Lepidium sativum seedlings
(Wydawnictwa AGH, 2014) Czaja, Monika; Kołton, Anna Magdalena; Muras, Piotr
Despite limiting the transport emitted pollution, contamination of the roadside environment remains an important issue. Due to necessity to decrease the lead emission, catalytic converters modifications were introduced. It caused increase of Platinum Group Elements (PGEs) emission, which was rare in the environment before. So far there is lack of information about platinum contamination to functioning of plants which are so important in the urban environment. In the experiment garden cress (<i>Lepidium sativum</i>) were sown into Petri dishes filled with filter paper soaked with solutions of different platinum concentration. There were used two compounds containing platinum at different oxidation states $PtCl_{4}$ - ssolutions containing 0.58, 2.89, 5.79, 11.58 and 23.16 mg $Pt^{4+} \cdot dm^{-3}$ and $[Pt(NH_{3})_{4}] (NO_{3})_{2}$ - solutions containing 0.50, 2.52, 5.04, 10.08 and 20.15 mg $Pt^{2+} \cdot dm^{-3}$ in every combination of the experiment. In every combination there were five Petri dishes, experiment was repeated twice. To estimate plant response to stress factor, phenolic compounds contents were analyzed in the roots and shoots parts separately. The highest amount of total phenolics in roots was recorded in plants treated with highest $Pt^{4+}$ dose which was 23.16 mg $\cdot dm^{-3}$, seeds treated with other doses of platinum (including those treated with highest dose of $Pt^{2+}$ did not differ significantly from control plants. In the case of phenolic compounds in the aboveground parts of seedlings there was highest accumulation than in roots. Highest amounts of phenolics were recorded in plants also treated with $Pt^{4+}$ in doses 11.58 and 23.16 mg $\cdot dm^{-3}$.
Access status: Open Access ,
Influence of platinum ions on the germination and seedling root growth of different plant species
(Wydawnictwa AGH, 2014) Kołton, Anna; Czaja, Monika
For several decades an increase of platinum in the environment was recorded. This is connected with the release of platinum from automobile catalytic converters and pharmaceutical industries. In the conducted experiments the effect of various forms and concentrations of platinum on the germination and roots growth of different plants (oat, garden cress and tomato) was investigated. Two separate experiments were performed with lower (experiment 1$^{st}$: 1, 5 and 10 mg/L) and higher (experiment 2$^{nd}$: 10, 20 and 40 mg/L) $[Pt(NH_{3})_{4}](NO_{3})_{2}$ or $PtCl_{4}$ dosages. There was no significant effect of dose and form of platinum on the germination of seeds (experiment 1$^{st}$ and 2$^{nd}$). The effect of platinum containing substances dose on root growth of young seedlings was observed during experiment, dependent on the species of tested plants. The root length of oat plants was similar in all treatments in experiment 1$^{st}$. The shortest tomato roots were observed in the case of a 10 mg/L of $PtCl_{4}$, it was statistically shorter than the control plants (treated with water) as well. The roots of the tomato treated with $[Pt(NH_{3})_{4}](NO_{3})_{2}$ were the same length as observed for the control sample. The garden cress root growth was not affected by $[Pt(NH_{3})_{4}](NO_{3})_{2}$, but a solution containing $Pt^{4+}$ stimulated the root growth. The roots of tomato and oat treated with $[Pt(NH_{3})_{4}](NO_{3})_{2}$ had similar length as the control plants in contrast to the far shorter roots treated with $PtCl_{4}$ (experiment 2$^{nd}$). Moreover, the treatment with $[Pt(NH_{3})_{4}](NO_{3})_{2}$ stimulated the growth of garden cress roots compared to the control, while only the lowest dose of $PtCl_{4}$ stimulated the root growth.