Thorium as an environment stressor for growth of Nicotiana glutinosa plants

Soudek, Petr; Hrdinová, A; Valseca, I.M. Rodriguez; Lhotáková, Zuzana; Mihaljevič, Martin; Kofroňová, Monika; Moťková, Kateřina; Albrechtová, Jana; Vaněk, Tomáš

doi:10.1016/j.envexpbot.2019.03.027

Cited by 11 publications

(3 citation statements)

References 83 publications

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“…The I-to-P rise was shown to be influenced by the electron transfer through cytochrome b6f to the PSI acceptor side [ 47 ]. Our results confirm previous data on the effect of P deficiency on IP phase of the OJIP transient [ 48 , 49 ]. Furthermore, ΔV IP was selected as one of the most important parameter to characterize the variability of plant photosynthetic efficiency [ 50 ].…”

Section: Discussionsupporting

confidence: 92%

PCA-based detection of phosphorous deficiency in wheat plants using prompt fluorescence and 820 nm modulated reflection signals

El-Mejjaouy,

Belmrhar,

Zeroual

et al. 2023

PLoS ONE

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Phosphorus deficiency induces biochemical and morphological changes which affect crop yield and production. Prompt fluorescence signal characterizes the PSII activity and electron transport from PSII to PSI, while the modulated light reflection at 820 (MR 820) nm investigates the redox state of photosystem I (PSI) and plastocyanin (PC). Therefore, combining information from modulated reflection at 820 nm with chlorophyll a fluorescence can potentially provide a more complete understanding of the photosynthetic process and integrating other plant physiological measurements may help to increase the accuracy of detecting the phosphorus deficiency in wheat leaves. In our study, we combined the chlorophyll a fluorescence and MR 820 signals to study the response of wheat plants to phosphorus deficiency as indirect tools for phosphorus plant status characterization. In addition, we studied the changes in chlorophyll content index, stomatal conductance (gs), root morphology, and biomass of wheat plants. The results showed an alteration in the electron transport chain as a specific response to P deficiency in the I-P phase during the reduction of the acceptor side of PSI. Furthermore, P deficiency increased parameters related to the energy fluxes per reaction centers, namely ETo/RC, REo/RC, ABS/RC, and DIo/RC. P deficiency increased the values of MRmin and MRmax and decreased νred, which implies that the reduction of PSI and PC became slower as the phosphorus decreased. The principal component analysis of the modulated reflection and chlorophyll a fluorescence parameters, with the integration of the growth parameters as supplementary variables, accounted for over 71% of the total variance in our phosphorus data using two components and provided a reliable information on PSII and PSI photochemistry under P deficiency.

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Section: Discussionsupporting

confidence: 92%

PCA-based detection of phosphorous deficiency in wheat plants using prompt fluorescence and 820 nm modulated reflection signals

El-Mejjaouy,

Belmrhar,

Zeroual

et al. 2023

PLoS ONE

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“…The specific enzymes do not react similarly to all metals. Several elements cause to an enhance in enzymes activities, whereas other elements decline the enzymes activities 26 . The excess ROS can cause lipid peroxidation (assayed as MDA content) by demeaning polyunsaturated fatty acids.…”

Section: Discussionmentioning

confidence: 99%

Cerium and samarium blocked antioxidant enzymes in wheat plants

Haghighi

Rezayian

Niknam

et al. 2023

Sci Rep

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This work was conducted to study positive and negative impacts of cerium (Ce) and samarium (Sm) on two cultivars (Arta and Baharan) in wheat plant. Symbols of stress such as proline, malondialdehyde (MDA) and antioxidant enzymes, which may be complicated in the suppression responses of plants, were also studied. Wheat plants were exposed to 0, 2500, 5000, 7500, 10,000 and 15,000 μM of Ce and Sm for 7 days. The growth enhanced in plants treated with lesser Ce and Sm concentration (2500 μM) and declined in plants treated with upper concentrations as compared to untreated plants. The treatment with 2500 μM of Ce and Sm increased dry weigh in Arta by 68.42 and 20% and in Baharan by 32.14% and 27.3%. Thus, Ce and Sm had hormesis effect on growth in wheat plants. According to plant’s growth parameter patterns, Arta cultivar had more sensitive to Sm than to Ce, whereas Baharan cultivar had sensitive to Ce than to Sm. Our results indicated impact of Ce and Sm on proline accumulation depended on the dosage of Ce and Sm. It was observed that Ce and Sm accumulated in wheat plants at higher exposure doses. Increment of MDA content by Ce and Sm treatments showed that these metals caused oxidative stress in wheat plants. Ce and Sm blocked enzymatic antioxidant system (superoxide dismutases, peroxidase and polyphenol peroxidase) in wheat. In wheat plants treated with lower Ce and Sm concentrations higher amounts of non-enzymatic antioxidant metabolites were detected. Thus, we showed the potential negative impact of unsuitable utilization of REEs in plants and suggested growth and interruption in physiological and biochemical mechanisms as a possible factor to recognize the underlying toxicological processes.

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“…Studies have shown that thorium in the system soil-plant is preferentially bound to the root of plants and that translocation into the above-ground parts is low [35,36], probably due to its low solubility and high affinity for negatively charged components of the cell wall [37]. Different types of vegetables analyzed for their Th content in southern coastal regions of India, a high background radiation area, indicated that the highest concentrations were found in root, up to 184 mBq kg -1 and green vegetables varied from 26 ± 1 to 62 ± 2 Bq kg -1 [38].…”

Section: Absorption Of Th By Plantsmentioning

confidence: 99%

Th-232 Radiological Aspects of Carbonate Niobium Mining Waste Use as Agricultural Amendment

et al. 2023

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The use of mining residues in agriculture may be possible, as long as there be previous studies in different areas, one of them being the analysis of the involved radionuclides behavior. This study determined the concentrations of 232Th activity in soil, soil treated with lime, soil with carbonate residue from niobium mining, soil with the mixture of lime and carbonate, in two moments. The transfer factor of 232Th from the soil to the plant was analyzed, in this case, lettuce (n=20), in the different types of treatment and in two moments. The addition of carbonate to the soils did not significantly alter the levels of radioactivity for 232Th radionuclide in lettuce. The effective dose resulting from the lettuce ingestion varied from 0.09 to 0.3 µSv y-1.

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Thorium as an environment stressor for growth of Nicotiana glutinosa plants

Cited by 11 publications

References 83 publications

PCA-based detection of phosphorous deficiency in wheat plants using prompt fluorescence and 820 nm modulated reflection signals

PCA-based detection of phosphorous deficiency in wheat plants using prompt fluorescence and 820 nm modulated reflection signals

Cerium and samarium blocked antioxidant enzymes in wheat plants

Th-232 Radiological Aspects of Carbonate Niobium Mining Waste Use as Agricultural Amendment

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