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Adamek M, Kavčič A, Debeljak M, Šala M, Grdadolnik J, Vogel-Mikuš K, Kroflič A. Toxicity of nitrophenolic pollutant 4-nitroguaiacol to terrestrial plants and comparison with its non-nitro analogue guaiacol (2-methoxyphenol). Sci Rep 2024; 14:2198. [PMID: 38272996 PMCID: PMC10811240 DOI: 10.1038/s41598-024-52610-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 01/21/2024] [Indexed: 01/27/2024] Open
Abstract
Phenols, and especially their nitrated analogues, are ubiquitous pollutants and known carcinogens which have already been linked to forest decline. Although nitrophenols have been widely recognized as harmful to different aquatic and terrestrial organisms, we could not find any literature assessing their toxicity to terrestrial plants. Maize (monocot) and sunflower (dicot) were exposed to phenolic pollutants, guaiacol (GUA) and 4-nitroguaiacol (4NG), through a hydroponics system under controlled conditions in a growth chamber. Their acute physiological response was studied during a two-week root exposure to different concentrations of xenobiotics (0.1, 1.0, and 10 mM). The exposure visibly affected plant growth and the effect increased with increasing xenobiotic concentration. In general, 4NG affected plants more than GUA. Moreover, sunflower exhibited an adaptive response, especially to low and moderate GUA concentrations. The integrity of both plant species deteriorated during the exposure: biomass and photochemical pigment content were significantly reduced, which reflected in the poorer photochemical efficiency of photosystem II. Our results imply that 4NG is taken up by sunflower plants, where it could enter a lignin biosynthesis pathway.
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Affiliation(s)
- Maksimiljan Adamek
- Department of Analytical Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia
- Department of Molecular Biology and Nanobiotechnology, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia
| | - Anja Kavčič
- Biotechnical Faculty, Department of Biology, University of Ljubljana, Jamnikarjeva 101, 1000, Ljubljana, Slovenia
| | - Marta Debeljak
- Department of Analytical Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia
| | - Martin Šala
- Department of Analytical Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia
| | - Jože Grdadolnik
- Theory Department, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, Department of Biology, University of Ljubljana, Jamnikarjeva 101, 1000, Ljubljana, Slovenia
- Jozef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Ana Kroflič
- Department of Analytical Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia.
- Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia.
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Starič P, Kolmanič A, Junkar I, Vogel-Mikuš K. Chemical alterations of grain surface by cold plasma technology: Comparison of buckwheat and wheat grain responses to oxygen low-pressure plasma. Heliyon 2023; 9:e20215. [PMID: 37809366 PMCID: PMC10559984 DOI: 10.1016/j.heliyon.2023.e20215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/18/2023] [Accepted: 09/13/2023] [Indexed: 10/10/2023] Open
Abstract
Cold plasma (CP) has a great potential for decontamination or improvement of grain germination. However, disputing results have been reported, as plasma treatment can affect species and varieties of grains in different ways. The differences may be due to the chemical composition of grain pericarps, the structure of the grains and metabolic response mechanisms. CP treatment decreased grain germination rate, speed and activity of α-amylase of buckwheat grains. Such effects on both varieties of wheat grains were present after longer exposure to plasma. Lipid peroxidation was highest in buckwheat grains, whereas wheat grains were less affected. Plasma-treated Gorolka variety exhibited a low level of lipid peroxidation, no different to untreated grains, compared to Primorka grains, where longer treatment triggered higher levels of lipid peroxidation. The response of grains to CP treatment depends on the chemical and structural properties of grains pericarp, as well as plant tolerance to certain abiotic conditions.
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Affiliation(s)
- Pia Starič
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva ulica 101, Ljubljana, Slovenia
- Institute Jožef Stefan, Jamova cesta 39, Ljubljana, Slovenia
| | - Aleš Kolmanič
- Agricultural Institute of Slovenia, Hacquetova ulica 17, Ljubljana, Slovenia
| | - Ita Junkar
- Institute Jožef Stefan, Jamova cesta 39, Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva ulica 101, Ljubljana, Slovenia
- Institute Jožef Stefan, Jamova cesta 39, Ljubljana, Slovenia
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Mravlje J, Kobal T, Regvar M, Starič P, Zaplotnik R, Mozetič M, Vogel-Mikuš K. The Sensitivity of Fungi Colonising Buckwheat Grains to Cold Plasma Is Species Specific. J Fungi (Basel) 2023; 9:609. [PMID: 37367545 DOI: 10.3390/jof9060609] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 05/22/2023] [Accepted: 05/23/2023] [Indexed: 06/28/2023] Open
Abstract
Fungi are the leading cause of plant diseases worldwide and are responsible for enormous agricultural and industrial losses on a global scale. Cold plasma (CP) is a potential tool for eliminating or inactivating fungal contaminants from biological material such as seeds and grains. This study used a low-pressure radiofrequency CP system with oxygen as the feed gas to test the decontamination efficacy of different genera and species commonly colonising buckwheat grains. Two widely accepted methods for evaluating fungal decontamination after CP treatment of seeds were compared: direct cultivation technique or contamination rate method (%) and indirect cultivation or colony-forming units (CFU) method. For most of the tested fungal taxa, an efficient decrease in contamination levels with increasing CP treatment time was observed. Fusarium graminearum was the most susceptible to CP treatment, while Fusarium fujikuroi seems to be the most resistant. The observed doses of oxygen atoms needed for 1-log reduction range from 1024-1025 m-2. Although there was some minor discrepancy between the results obtained from both tested methods (especially in the case of Fusarium spp.), the trends were similar. The results indicate that the main factors affecting decontamination efficiency are spore shape, size, and colouration.
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Affiliation(s)
- Jure Mravlje
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Tanja Kobal
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Marjana Regvar
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Pia Starič
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
| | - Rok Zaplotnik
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
| | - Miran Mozetič
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
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Starič P, Remic L, Vogel-Mikuš K, Junkar I, Vavpetič P, Kelemen M, Pongrac P. Exploring the potential of cold plasma treatment followed by zinc-priming for biofortification of buckwheat sprouts. Front Nutr 2023; 10:1151101. [PMID: 37215205 PMCID: PMC10196170 DOI: 10.3389/fnut.2023.1151101] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 04/19/2023] [Indexed: 05/24/2023] Open
Abstract
Increasing the concentration of an element in edible produce (i.e., biofortification) can mitigate the element deficiency in humans. Sprouts are small but popular part of healthy diets providing vitamins and essential elements throughout the year. Element composition of sprouts can easily be amended, e.g., by soaking the grains in element-rich solution before germination (grain-priming). In addition, pre-treatment of grains to improve element translocation from the solution into the grain may further enhance the element concentration in the sprout. Cold plasma technique could provide such solution, as it increases wettability and water uptake of grains. Grains of common buckwheat (Fogopyrum esculentum Moench) were pre-treated/ untreated with cold plasma and soaked in ZnCl2 solution/pure water. Germination tests, α-amylase activity, grain hydrophilic properties and water uptake were assessed. Element composition of grain tissues and of sprouts was assessed by micro-particle-induced-X-ray emission and X-ray fluorescence spectroscopy, respectively. Grain-priming increased Zn concentration in shoots of common buckwheat sprouts more than five-times, namely from 79 to 423 mg Zn kg-1 dry weight. Cold plasma treatment increased grain wettability and water uptake into the grain. However, cold plasma pre-treatment followed by grain-priming with ZnCl2 did not increase Zn concentration in different grain tissues or in the sprouts more than the priming alone, but rather decreased the Zn concentration in sprout shoots (average ± standard error: 216 ± 6.13 and 174 ± 7.57 mg Zn kg-1 dry weight, respectively). When the fresh weight portion of whole sprouts (i.e., of roots and shoots) was considered, comparable average requirements of Zn, namely 24.5 % and 35 % for adult men and women would be satisfied by consuming cold plasma pre-treated and not pre-treated grains. Potential advantages of cold plasma pre-treatment need to be tested further, mainly to optimize the duration of soaking required to produce Zn-enriched sprouts.
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Affiliation(s)
- Pia Starič
- Jožef Stefan Institute, Ljubljana, Slovenia
- Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Lucija Remic
- Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Jožef Stefan Institute, Ljubljana, Slovenia
- Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Ita Junkar
- Jožef Stefan Institute, Ljubljana, Slovenia
| | | | | | - Paula Pongrac
- Jožef Stefan Institute, Ljubljana, Slovenia
- Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
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Pongrac P, Kelemen M, Vogel-Mikuš K, Vavpetič P, Pelicon P, Žurga P, Vidović N, Polić Pasković M, Smiljana GB, Lukić I, Pasković I. Tissue-specific calcium and magnesium allocation to explain differences in bulk concentration in leaves of one-year-old seedlings of two olive (Olea europaea L.) cultivars. Plant Physiol Biochem 2023; 194:619-626. [PMID: 36535101 DOI: 10.1016/j.plaphy.2022.11.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 11/28/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Olive tree (Olea europaea L.) leaves have recently been recognised as a valuable source in cosmetic and pharmaceutical industry as well as in preparation of health-supporting beverages. Little is known about the element composition of olive leaves and almost nothing about tissue-specific allocation of elements. Element composition and tissue-specific distribution were determined in leaves of two olive cultivars, Leccino and Istarska bjelica using micro-particle induced X-ray emission (micro-PIXE). In leaves of the Istarska bjelica cultivar larger bulk concentrations of potassium, sodium, molybdenum and boron, but smaller concentrations of calcium and magnesium were found than in leaves of the Leccino cultivar. Tissue-specific investigation revealed that larger concentration of calcium in epidermis and in leaf blade tissues (secondary veins, palisade and spongy mesophyll) contributed to the larger leaf bulk calcium concentration in the Leccino cultivar. For magnesium, all leaf tissues, except the bundle sheath cells and consequently the main vascular bundle, contributed to the larger bulk concentration in the Leccino cultivar. Potassium was not predominant in any of the leaf tissues examined, while sodium and molybdenum were below the limit of detection, and boron not detectable by micro-PIXE. The results indicate that sinks for calcium and magnesium are stronger in specific leaf tissues of the Leccino than of the Istarska bjelica cultivar. The new understanding of tissue-specific allocation of elements in leaves of olive will serve as a basis for detailed studies into the effects of foliar and/or soil fertilisers in olive.
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Affiliation(s)
- Paula Pongrac
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000, Ljubljana, Slovenia; Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia.
| | - Mitja Kelemen
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000, Ljubljana, Slovenia; Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Primož Vavpetič
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Primož Pelicon
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Paula Žurga
- Teaching Institute of Public Health Primorsko-Goranska County, Krešimirova 52a, 51000, Rijeka, Croatia
| | - Nikolina Vidović
- Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, K. Huguesa 8, 52440, Poreč, Croatia
| | - Marija Polić Pasković
- Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, K. Huguesa 8, 52440, Poreč, Croatia
| | - Goreta Ban Smiljana
- Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, K. Huguesa 8, 52440, Poreč, Croatia; Centre of Excellence for Biodiversity and Molecular Plant Breeding, Svetošimunska 25, 10000, Zagreb, Croatia
| | - Igor Lukić
- Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, K. Huguesa 8, 52440, Poreč, Croatia; Centre of Excellence for Biodiversity and Molecular Plant Breeding, Svetošimunska 25, 10000, Zagreb, Croatia
| | - Igor Pasković
- Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, K. Huguesa 8, 52440, Poreč, Croatia
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Chen Z, Hu B, Hu S, Vogel-Mikuš K, Pongrac P, Vymazal J. Immobilization of chromium enhanced by arbuscular mycorrhizal fungi in semi-aquatic habitats with biochar addition. J Hazard Mater 2022; 439:129562. [PMID: 35868083 DOI: 10.1016/j.jhazmat.2022.129562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 06/24/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
Arbuscular mycorrhizal fungi (AMF) exhibit great potential in heavy-metal immobilization in semi-aquatic habitats. Under high heavy-metal stress, however, the role of AMF is limited, and the detoxification mechanism of AMF in heavy metals' stabilization remains unclear. This study investigated the effects of AMF on a wetland plant (Iris pseudacorus) and chromium (Cr) immobilization at different water depths in semi-aquatic habitats with biochar addition. Results showed that AMF increased the physiological and photosynthetic functions in I. pseudacorus under Cr exposures. Besides, AMF alleviated the accumulation of reactive oxygen species and lipid peroxidation by enhancing the antioxidant enzyme activities. AMF and biochar significantly decreased Cr concentrations in outlet water and increased Cr accumulation in I. pseudacorus. Besides, biochar also vastly improved Cr accumulation in the substrate under the fluctuating water depth. AMF reduced Cr bioavailability in the substrate, with Cr (Ⅵ) concentrations and acid-soluble forms of Cr decreased by 0.3-64.5% and 19.0-40.8%, respectively. Micro-proton-induced X-ray emission was used to determine element localization and revealed that AMF improved the nutrients uptake by wetland plants and inhibited Cr translocation from roots to shoots. Overall, this study demonstrated that the interaction between AMF and biochar could significantly enhance the immobilization of high Cr concentrations in semi-aquatic habitats.
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Affiliation(s)
- Zhongbing Chen
- Department of Applied Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha-Suchdol 16500, Czech Republic
| | - Bo Hu
- Department of Applied Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha-Suchdol 16500, Czech Republic
| | - Shanshan Hu
- Department of Applied Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha-Suchdol 16500, Czech Republic.
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva ulica 101, 1000 Ljubljana, Slovenia; Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia
| | - Paula Pongrac
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva ulica 101, 1000 Ljubljana, Slovenia; Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia
| | - Jan Vymazal
- Department of Applied Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha-Suchdol 16500, Czech Republic
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Jeromel L, Ogrinc N, Siketić Z, Vavpetič P, Rupnik Z, Bučar K, Jenčič B, Kelemen M, Vencelj M, Vogel-Mikuš K, Kovač J, Heeren RMA, Flinders B, Cuypers E, Barba Ž, Pelicon P. Molecular imaging of humain hair with MeV-SIMS: A case study of cocaine detection and distribution in the hair of a cocaine user. PLoS One 2022; 17:e0263338. [PMID: 35333862 PMCID: PMC8956162 DOI: 10.1371/journal.pone.0263338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 01/17/2022] [Indexed: 11/18/2022] Open
Abstract
Human hair absorbs numerous biomolecules from the body during its growth. This can act as a fingerprint to determine substance intake of an individual, which can be useful in forensic studies. The cocaine concentration profile along the growth axis of hair indicates the time evolution of the metabolic incorporation of cocaine usage. It could be either assessed by chemical extraction and further analysis of hair bundels, or by direct single hair fibre analysis with mass spectroscopy imaging (MSI). Within this work, we analyzed the cocaine distribution in individual hair samples using MeV-SIMS. Unlike conventional surface analysis methods, we demonstrate high yields of nonfragmented molecular ions from the surface of biological materials, resulting in high chemical sensitivity and non-destructive characterisation. Hair samples were prepared by longitudinally cutting along the axis of growth, leaving half-cylindrical shape to access the interior structure of the hair by the probing ion beam, and attached to the silicon wafer. A focused 5.8 MeV 35Cl6+ beam was scanned across the intact, chemically pristine hair structure. A non-fragmented protonated [M+ H]+ cocaine molecular peak at m/z = 304 was detected and localized along the cross-section of the hair. Its intensity exhibits strong fluctuations along the direction of the hair’s growth, with pronounced peaks as narrow as 50 micrometres, corresponding to a metabolic incorporation time of approx. three hours.
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Affiliation(s)
| | - Nina Ogrinc
- The Maastricht MultiModal Molecular Imaging Institute, Maastricht University, ER Maastricht, Maastricht, The Netherlands
| | | | | | | | | | | | | | | | - Katarina Vogel-Mikuš
- Jožef Stefan Institute, SI-Ljubljana, Slovenia
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Janez Kovač
- Jožef Stefan Institute, SI-Ljubljana, Slovenia
| | - Ron M. A. Heeren
- The Maastricht MultiModal Molecular Imaging Institute, Maastricht University, ER Maastricht, Maastricht, The Netherlands
| | - Bryn Flinders
- The Maastricht MultiModal Molecular Imaging Institute, Maastricht University, ER Maastricht, Maastricht, The Netherlands
| | - Eva Cuypers
- The Maastricht MultiModal Molecular Imaging Institute, Maastricht University, ER Maastricht, Maastricht, The Netherlands
- KU Leuven Toxicology & Pharmacology, Leuven, Belgium
| | - Žiga Barba
- Jožef Stefan Institute, SI-Ljubljana, Slovenia
- * E-mail:
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Vogel-Mikuš K, Pongrac P. Imaging of Potassium and Calcium Distribution in Plant Tissues and Cells to Monitor Stress Response and Programmed Cell Death. Methods Mol Biol 2022; 2447:233-246. [PMID: 35583786 DOI: 10.1007/978-1-0716-2079-3_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In plants, the response to stress, such as salinity, pathogen attack, drought, high concentration of metals, hyperthermia, and hypothermia, is usually accompanied by potassium ion (K+) leakage from the cytosol to the cell wall, mediated by plasma membrane cation conductivity. Stress-induced electrolyte leakage co-occurs with accumulation of reactive oxygen species (ROS) and calcium ions (Ca2+) and often results in programmed cell death (PCD). The development of X-ray and mass spectrometry (MS) based imaging techniques has enabled insight into the spatial tissue and cell-specific redistribution of major and trace elements during the stress response. In this chapter a workflow for sample preparation, imaging, and image analysis by X-ray and MS based techniques is presented.
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Affiliation(s)
- Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia.
- Jozef Stefan Institute, Ljubljana, Slovenia.
| | - Paula Pongrac
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
- Jozef Stefan Institute, Ljubljana, Slovenia
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Mavrič Čermelj A, Golob A, Vogel-Mikuš K, Germ M. Silicon Mitigates Negative Impacts of Drought and UV-B Radiation in Plants. Plants (Basel) 2021; 11:91. [PMID: 35009094 PMCID: PMC8747213 DOI: 10.3390/plants11010091] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/18/2021] [Accepted: 12/24/2021] [Indexed: 05/31/2023]
Abstract
Due to climate change, plants are being more adversely affected by heatwaves, floods, droughts, and increased temperatures and UV radiation. This review focuses on enhanced UV-B radiation and drought, and mitigation of their adverse effects through silicon addition. Studies on UV-B stress and addition of silicon or silicon nanoparticles have been reported for crop plants including rice, wheat, and soybean. These have shown that addition of silicon to plants under UV-B radiation stress increases the contents of chlorophyll, soluble sugars, anthocyanins, flavonoids, and UV-absorbing and antioxidant compounds. Silicon also affects photosynthesis rate, proline content, metal toxicity, and lipid peroxidation. Drought is a stress factor that affects normal plant growth and development. It has been frequently reported that silicon can reduce stress caused by different abiotic factors, including drought. For example, under drought stress, silicon increases ascorbate peroxidase activity, total soluble sugars content, relative water content, and photosynthetic rate. Silicon also decreases peroxidase, catalase, and superoxide dismutase activities, and malondialdehyde content. The effects of silicon on drought and concurrently UV-B stressed plants has not yet been studied in detail, but initial studies show some stress mitigation by silicon.
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Affiliation(s)
- Anja Mavrič Čermelj
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva ulica 101, 1000 Ljubljana, Slovenia; (A.G.); (K.V.-M.); (M.G.)
| | - Aleksandra Golob
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva ulica 101, 1000 Ljubljana, Slovenia; (A.G.); (K.V.-M.); (M.G.)
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva ulica 101, 1000 Ljubljana, Slovenia; (A.G.); (K.V.-M.); (M.G.)
- Jozef Stefan Institut, Jamova 39, 1000 Ljubljana, Slovenia
| | - Mateja Germ
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva ulica 101, 1000 Ljubljana, Slovenia; (A.G.); (K.V.-M.); (M.G.)
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Dauer Née Joppe K, Tatenhorst L, Caldi Gomes L, Zhang S, Parvaz M, Carboni E, Roser AE, El DeBakey H, Bähr M, Vogel-Mikuš K, Wang Ip C, Becker S, Zweckstetter M, Lingor P. Brain iron enrichment attenuates α-synuclein spreading after injection of preformed fibrils. J Neurochem 2021; 159:554-573. [PMID: 34176164 DOI: 10.1111/jnc.15461] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 12/12/2022]
Abstract
Regional iron accumulation and α-synuclein (α-syn) spreading pathology within the central nervous system are common pathological findings in Parkinson's disease (PD). Whereas iron is known to bind to α-syn, facilitating its aggregation and regulating α-syn expression, it remains unclear if and how iron also modulates α-syn spreading. To elucidate the influence of iron on the propagation of α-syn pathology, we investigated α-syn spreading after stereotactic injection of α-syn preformed fibrils (PFFs) into the striatum of mouse brains after neonatal brain iron enrichment. C57Bl/6J mouse pups received oral gavage with 60, 120, or 240 mg/kg carbonyl iron or vehicle between postnatal days 10 and 17. At 12 weeks of age, intrastriatal injections of 5-µg PFFs were performed to induce seeding of α-syn aggregates. At 90 days post-injection, PFFs-injected mice displayed long-term memory deficits, without affection of motor behavior. Interestingly, quantification of α-syn phosphorylated at S129 showed reduced α-syn pathology and attenuated spreading to connectome-specific brain regions after brain iron enrichment. Furthermore, PFFs injection caused intrastriatal microglia accumulation, which was alleviated by iron in a dose-dependent way. In primary cortical neurons in a microfluidic chamber model in vitro, iron application did not alter trans-synaptic α-syn propagation, possibly indicating an involvement of non-neuronal cells in this process. Our study suggests that α-syn PFFs may induce cognitive deficits in mice independent of iron. However, a redistribution of α-syn aggregate pathology and reduction of striatal microglia accumulation in the mouse brain may be mediated via iron-induced alterations of the brain connectome.
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Affiliation(s)
- Karina Dauer Née Joppe
- Department of Neurology, University Medical Center Goettingen, Goettingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Goettingen, Goettingen, Germany
| | - Lars Tatenhorst
- Department of Neurology, University Medical Center Goettingen, Goettingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Goettingen, Goettingen, Germany
| | - Lucas Caldi Gomes
- Department of Neurology, University Medical Center Goettingen, Goettingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Goettingen, Goettingen, Germany
- Department of Neurology, School of Medicine, University Hospital rechts der Isar, Technical University of Munich, Munich, Germany
| | - Shuyu Zhang
- Department of Neurology, School of Medicine, University Hospital rechts der Isar, Technical University of Munich, Munich, Germany
| | - Mojan Parvaz
- Department of Neurology, School of Medicine, University Hospital rechts der Isar, Technical University of Munich, Munich, Germany
| | - Eleonora Carboni
- Department of Neurology, University Medical Center Goettingen, Goettingen, Germany
| | - Anna-Elisa Roser
- Department of Neurology, University Medical Center Goettingen, Goettingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Goettingen, Goettingen, Germany
| | - Hazem El DeBakey
- Department of Neurology, University Hospital of Wuerzburg, Wuerzburg, Germany
| | - Mathias Bähr
- Department of Neurology, University Medical Center Goettingen, Goettingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Goettingen, Goettingen, Germany
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Goettingen, Goettingen, Germany
| | - Katarina Vogel-Mikuš
- Biotechnical faculty, University of Ljubljana, Ljubljana, Slovenia
- Jozef Stefan Institute, Ljubljana, Slovenia
| | - Chi Wang Ip
- Department of Neurology, University Hospital of Wuerzburg, Wuerzburg, Germany
| | - Stefan Becker
- Department of NMR Based Structural Biology, Max Planck Institute for Biophysical Chemistry, Goettingen, Germany
| | - Markus Zweckstetter
- Department of Neurology, University Medical Center Goettingen, Goettingen, Germany
- German Center for Neurodegenerative Diseases (DZNE), Goettingen, Germany
- Research group Mass Spectrometry, Max Planck Institute for Biophysical Chemistry, Goettingen, Germany
| | - Paul Lingor
- Department of Neurology, University Medical Center Goettingen, Goettingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Goettingen, Goettingen, Germany
- Department of Neurology, School of Medicine, University Hospital rechts der Isar, Technical University of Munich, Munich, Germany
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11
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Potisek M, Likar M, Vogel-Mikuš K, Arčon I, Grdadolnik J, Regvar M. 1,8-dihydroxy naphthalene (DHN) - melanin confers tolerance to cadmium in isolates of melanised dark septate endophytes. Ecotoxicol Environ Saf 2021; 222:112493. [PMID: 34265529 DOI: 10.1016/j.ecoenv.2021.112493] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 06/10/2021] [Accepted: 07/03/2021] [Indexed: 05/25/2023]
Abstract
The contribution of 1,8-dihydroxy naphthalene (DHN) melanin to cadmium (Cd) tolerance in two dark septate endophytes (DSE) of the genus Cadophora with different melanin content was investigated in vitro. The DSE isolate Cad#148 with higher melanin content showed higher tolerance to Cd than the less melanised Cad#149. Melanin synthesis was significantly reduced by Cd in both isolates with uninhibited melanin synthesis, in a dose-dependent manner. Inhibition of melanin synthesis by tricyclazole reduced the relative growth of Cad#148 exposed to Cd and did not affect Cad#149. Cd accumulation was not altered by tricyclazole in the two isolates, but it increased catalase and reduced glutathione reductase activity in more melanised Cad#148, indicating higher stress levels. In contrast, in Cad#149 the enzyme activity was less affected by tricyclazole, indicating a more pronounced role of melanin-independent Cd tolerance mechanisms. Cd ligand environment in fungal mycelia was analysed by extended EXAFS (X-ray absorption fine structure). It revealed that Cd was mainly bound to O- and S-ligands, including hydroxyl, carboxyl, phosphate and thiol groups. A similar proportion of S- and O- ligands (~35% and ~65%) were found in both isolates with uninhibited melanin synthesis. Among O-ligands two types with Cd-O-C- and Cd-O-P- coordination were identified. Tricyclazole altered Cd-O- ligand environment in both fungal isolates by reducing the proportion of Cd-O-C- and increasing the proportion of Cd-O-P coordination. DHN-melanin, among other tolerance mechanisms, significantly contributes to Cd tolerance in more melanised DSE fungi by immobilising Cd to hydroxyl groups and maintaining the integrity of the fungal cell wall.
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Affiliation(s)
- Mateja Potisek
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia.
| | - Matevž Likar
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia; Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Iztok Arčon
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; University of Nova Gorica, Vipavska 13, POB 301, SI-5001 Nova Gorica, Slovenia
| | - Jože Grdadolnik
- National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia
| | - Marjana Regvar
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia
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12
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Alcock TD, Thomas CL, Ó Lochlainn S, Pongrac P, Wilson M, Moore C, Reyt G, Vogel-Mikuš K, Kelemen M, Hayden R, Wilson L, Stephenson P, Østergaard L, Irwin JA, Hammond JP, King GJ, Salt DE, Graham NS, White PJ, Broadley MR. Magnesium and calcium overaccumulate in the leaves of a schengen3 mutant of Brassica rapa. Plant Physiol 2021; 186:1616-1631. [PMID: 33831190 PMCID: PMC8260142 DOI: 10.1093/plphys/kiab150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 03/12/2021] [Indexed: 05/04/2023]
Abstract
Magnesium (Mg) and calcium (Ca) are essential mineral nutrients poorly supplied in many human food systems. In grazing livestock, Mg and Ca deficiencies are costly welfare issues. Here, we report a Brassica rapa loss-of-function schengen3 (sgn3) mutant, braA.sgn3.a-1, which accumulates twice as much Mg and a third more Ca in its leaves. We mapped braA.sgn3.a to a single recessive locus using a forward ionomic screen of chemically mutagenized lines with subsequent backcrossing and linked-read sequencing of second back-crossed, second filial generation (BC2F2) segregants. Confocal imaging revealed a disrupted root endodermal diffusion barrier, consistent with SGN3 encoding a receptor-like kinase required for normal formation of Casparian strips, as reported in thale cress (Arabidopsis thaliana). Analysis of the spatial distribution of elements showed elevated extracellular Mg concentrations in leaves of braA.sgn3.a-1, hypothesized to result from preferential export of excessive Mg from cells to ensure suitable cellular concentrations. This work confirms a conserved role of SGN3 in controlling nutrient homeostasis in B. rapa, and reveals mechanisms by which plants are able to deal with perturbed shoot element concentrations resulting from a "leaky" root endodermal barrier. Characterization of variation in leaf Mg and Ca accumulation across a mutagenized population of B. rapa shows promise for using such populations in breeding programs to increase edible concentrations of essential human and animal nutrients.
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Affiliation(s)
- Thomas D Alcock
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
- Future Food Beacon of Excellence, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
- School of Life Sciences, Technical University of Munich, 85354 Freising, Germany
| | - Catherine L Thomas
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
- Department of Sustainable Agriculture Sciences, Rothamsted Research, West Common, Hertfordshire AL5 2JQ, UK
| | - Seosamh Ó Lochlainn
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Paula Pongrac
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia
- Biotechnical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Michael Wilson
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
- Future Food Beacon of Excellence, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Christopher Moore
- Future Food Beacon of Excellence, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
- School of Life Sciences, University of Nottingham, Queen’s Medical Centre, Nottingham NG7 2UH, UK
| | - Guilhem Reyt
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
- Future Food Beacon of Excellence, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Katarina Vogel-Mikuš
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia
- Biotechnical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia
| | | | - Rory Hayden
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Lolita Wilson
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Pauline Stephenson
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Lars Østergaard
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Judith A Irwin
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - John P Hammond
- School of Agriculture, Policy and Development and the Centre for Food Security, University of Reading, Whiteknights, P.O. Box 237, Reading RG6 6AR, UK
- Southern Cross Plant Science, Southern Cross University, Lismore, New South Wales 2480, Australia
| | - Graham J King
- Southern Cross Plant Science, Southern Cross University, Lismore, New South Wales 2480, Australia
| | - David E Salt
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
- Future Food Beacon of Excellence, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Neil S Graham
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Philip J White
- Ecological Sciences, The James Hutton Institute, Invergowrie, Dundee DD2 5DA, UK
- Distinguished Scientist Fellowship Program, King Saud University, Riyadh 11451, Saudi Arabia
| | - Martin R Broadley
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK
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13
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Mravlje J, Regvar M, Starič P, Mozetič M, Vogel-Mikuš K. Cold Plasma Affects Germination and Fungal Community Structure of Buckwheat Seeds. Plants (Basel) 2021; 10:851. [PMID: 33922511 PMCID: PMC8145130 DOI: 10.3390/plants10050851] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/18/2021] [Accepted: 04/20/2021] [Indexed: 01/27/2023]
Abstract
Crop seeds are frequently colonised by fungi from the field or storage places. Some fungi can cause plant diseases or produce mycotoxins, compromising the use of seeds as seeding material, food or feed. We have investigated the effects of cold plasma (CP) on seed germination and diversity of seed-borne fungi in common and Tartary buckwheat. The seeds were treated with CP for 15, 30, 45, 60, 90, and 120 s in a low-pressure radiofrequency system using oxygen as the feed gas. The fungi from the seed surface and fungal endophytes were isolated using potato dextrose agar plates. After identification by molecular methods, the frequency and diversity of fungal strains were compared between CP treated and chemically surface-sterilised (30% of H2O2) seeds. CP treatments above 60 s negatively affected the germination of both buckwheat species. A significant reduction in fungal frequency and diversity was observed after 90 s and 120 s in common and Tartary buckwheat, respectively. The filamentous fungi of genera Alternaria and Epicoccum proved to be the most resistant to CP. The results of our study indicate that CP treatment used in our study may be applicable in postharvest and food production, but not for further seed sowing.
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Affiliation(s)
- Jure Mravlje
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; (M.R.); (K.V.-M.)
| | - Marjana Regvar
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; (M.R.); (K.V.-M.)
| | - Pia Starič
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (P.S.); (M.M.)
| | - Miran Mozetič
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (P.S.); (M.M.)
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; (M.R.); (K.V.-M.)
- Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (P.S.); (M.M.)
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14
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Luthar Z, Germ M, Likar M, Golob A, Vogel-Mikuš K, Pongrac P, Kušar A, Pravst I, Kreft I. Breeding Buckwheat for Increased Levels of Rutin, Quercetin and Other Bioactive Compounds with Potential Antiviral Effects. Plants (Basel) 2020; 9:E1638. [PMID: 33255469 PMCID: PMC7760024 DOI: 10.3390/plants9121638] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 12/31/2022]
Abstract
Common buckwheat (Fagopyrum esculentum Moench) and Tartary buckwheat (Fagopyrum tataricum (L.) Gaertn.) are sources of many bioactive compounds, such as rutin, quercetin, emodin, fagopyrin and other (poly)phenolics. In damaged or milled grain under wet conditions, most of the rutin in common and Tartary buckwheat is degraded to quercetin by rutin-degrading enzymes (e.g., rutinosidase). From Tartary buckwheat varieties with low rutinosidase activity it is possible to prepare foods with high levels of rutin, with the preserved initial levels in the grain. The quercetin from rutin degradation in Tartary buckwheat grain is responsible in part for inhibition of α-glucosidase in the intestine, which helps to maintain normal glucose levels in the blood. Rutin and emodin have the potential for antiviral effects. Grain embryos are rich in rutin, so breeding buckwheat with the aim of producing larger embryos may be a promising strategy to increase the levels of rutin in common and Tartary buckwheat grain, and hence to improve its nutritional value.
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Affiliation(s)
- Zlata Luthar
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (Z.L.); (M.G.); (M.L.); (A.G.); (K.V.-M.); (P.P.)
| | - Mateja Germ
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (Z.L.); (M.G.); (M.L.); (A.G.); (K.V.-M.); (P.P.)
| | - Matevž Likar
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (Z.L.); (M.G.); (M.L.); (A.G.); (K.V.-M.); (P.P.)
| | - Aleksandra Golob
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (Z.L.); (M.G.); (M.L.); (A.G.); (K.V.-M.); (P.P.)
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (Z.L.); (M.G.); (M.L.); (A.G.); (K.V.-M.); (P.P.)
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Paula Pongrac
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (Z.L.); (M.G.); (M.L.); (A.G.); (K.V.-M.); (P.P.)
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Anita Kušar
- Nutrition Institute, Tržaška 40, SI-1000 Ljubljana, Slovenia; (A.K.); (I.P.)
| | - Igor Pravst
- Nutrition Institute, Tržaška 40, SI-1000 Ljubljana, Slovenia; (A.K.); (I.P.)
| | - Ivan Kreft
- Nutrition Institute, Tržaška 40, SI-1000 Ljubljana, Slovenia; (A.K.); (I.P.)
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15
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Detterbeck A, Pongrac P, Persson DP, Vogel-Mikuš K, Kelemen M, Vavpetič P, Pelicon P, Arčon I, Husted S, Kofod Schjoerring J, Clemens S. Temporal and Spatial Patterns of Zinc and Iron Accumulation during Barley ( Hordeum vulgare L.) Grain Development. J Agric Food Chem 2020; 68:12229-12240. [PMID: 33070613 DOI: 10.1021/acs.jafc.0c04833] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Breeding and engineering of biofortified crops will benefit from a better understanding of bottlenecks controlling micronutrient loading within the seeds. However, few studies have addressed the changes in micronutrient concentrations, localization, and speciation occurring over time. Therefore, we studied spatial patterns of zinc and iron accumulation during grain development in two barley lines with contrasting grain zinc concentrations. Microparticle-induced-X-ray emission and laser ablation-inductively coupled plasma mass spectrometry were used to determine tissue-specific accumulation of zinc, iron, phosphorus, and sulfur. Differences in zinc accumulation between the lines were most evident in the endosperm and aleurone. A gradual decrease in zinc concentrations from the aleurone to the underlying endosperm was observed, while iron and phosphorus concentrations decreased sharply. Iron co-localized with phosphorus in the aleurone, whereas zinc co-localized with sulfur in the sub-aleurone. We hypothesize that differences in grain zinc are largely explained by the endosperm storage capacity. Engineering attempts should be targeted accordingly.
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Affiliation(s)
- Amelie Detterbeck
- Department of Plant Physiology, Bayreuth Center of Ecology and Environmental Research, University of Bayreuth, 95447 Bayreuth, Germany
| | - Paula Pongrac
- Department of Plant Physiology, Bayreuth Center of Ecology and Environmental Research, University of Bayreuth, 95447 Bayreuth, Germany
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Daniel P Persson
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Mitja Kelemen
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Primož Vavpetič
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Primož Pelicon
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Iztok Arčon
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
- University of Nova Gorica, Vipavska 13, SI-5000 Nova Gorica, Slovenia
| | - Søren Husted
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Jan Kofod Schjoerring
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Stephan Clemens
- Department of Plant Physiology, Bayreuth Center of Ecology and Environmental Research, University of Bayreuth, 95447 Bayreuth, Germany
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16
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Gaberščik A, Grašič M, Vogel-Mikuš K, Germ M, Golob A. Water Shortage Strongly Alters Formation of Calcium Oxalate Druse Crystals and Leaf Traits in Fagopyrum esculentum. Plants (Basel) 2020; 9:E917. [PMID: 32698521 PMCID: PMC7411882 DOI: 10.3390/plants9070917] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/18/2020] [Accepted: 07/18/2020] [Indexed: 06/11/2023]
Abstract
Common buckwheat (Fagopyrum esculentum Moench) is a robust plant with high resistance to different environmental constraints. It contains high levels of calcium oxalate (CaOx) druse crystals, although their role remains obscure. The objective was to examine the effects of water shortage on plant biomass partition and leaf traits and formation of CaOx druse crystals in common buckwheat. Buckwheat plants were exposed to favorable and reduced water availability for 28 days. The element composition and morphological, biochemical, physiological and optical traits of the leaves, and the plant biomass were investigated under these conditions. Measurements of photochemical efficiency of photosystem II showed undisturbed functioning for buckwheat exposed to water shortage, apparently due to partially closed stomata and more efficient water regulation. Strong relationships were seen between water-related parameters and Ca, Mn and S content, and size and density of CaOx druse crystals. Redundancy analysis revealed the importance of the size of CaOx druse crystals to explain reflection in the UV range. Water shortage resulted in shorter plants with the same leaf mass (i.e., increased mass:height ratio), which, together with denser leaf tissue and higher content of photosynthetic pigments and protective substances, provides an advantage under extreme weather conditions.
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Affiliation(s)
- Alenka Gaberščik
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (A.G.); (M.G.); (K.V.-M.); (A.G.)
| | - Mateja Grašič
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (A.G.); (M.G.); (K.V.-M.); (A.G.)
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (A.G.); (M.G.); (K.V.-M.); (A.G.)
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Mateja Germ
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (A.G.); (M.G.); (K.V.-M.); (A.G.)
| | - Aleksandra Golob
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (A.G.); (M.G.); (K.V.-M.); (A.G.)
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17
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Fourati E, Vogel-Mikuš K, Wali M, Kavčič A, Gomilšek JP, Kodre A, Kelemen M, Vavpetič P, Pelicon P, Abdelly C, Ghnaya T. Nickel tolerance and toxicity mechanisms in the halophyte Sesuvium portulacastrum L. as revealed by Ni localization and ligand environment studies. Environ Sci Pollut Res Int 2020; 27:23402-23410. [PMID: 31119536 DOI: 10.1007/s11356-019-05209-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 04/15/2019] [Indexed: 06/09/2023]
Abstract
Halophytes are able to tolerate relatively high concentrations of hazardous metals in a growing substrate, what makes them suitable candidates for phytoremediation of metal-contaminated soils. In this work, we aimed to study the physiological responses of the halophyte Sesuvium portulacastrum L. to Ni, with main focus on Ni localization, compartmentation and ligand environment, to decipher Ni tolerance and toxicity mechanisms. Seedlings were grown in hydroponic nutrient solution containing 0, 25, 50 and 100 μM Ni as NiCl2 for 3 weeks. Ni localization in leaves was assessed by micro-proton-induced X-ray emission (micro-PIXE). Ni ligand environment was studied by Ni K-edge X-ray absorption near edge structure (XANES). In addition, Ni-soluble, weakly bound/exchangeable and insoluble leaf tissue fractions were determined by sequential extraction. Results show that S. portulacastrum is able to tolerate up to ~ 500 μg g-1 dry weight (DW) of Ni in the shoots without significant growth reduction. At higher Ni concentrations (> 50 μM Ni in nutrient solution), chloroses were observed due to the accumulation of Ni in photosynthetically active chlorenchyma as revealed by micro-PIXE. Water storage tissue represented the main pool for Ni storage. Incorporation of Ni into Ca-oxalate crystals was also observed in some specimens, conferring tolerance to high leaf Ni concentrations. The majority of Ni (> 70%) was found in soluble tissue fraction. Ni K XANES revealed Ni bound mainly to O- (55%) and N-ligands (45%). Ni toxicity at higher Ni levels was associated with Ni binding to amino groups of proteins in cytosol of chlorenchyma and increased level of lipid peroxidation. Proline levels also increased at high Ni exposures and were associated with Ni-induced oxidative stress and alteration of water regime.
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Affiliation(s)
- Emna Fourati
- Faculty of Sciences Tunis, Campus Universitaire Tunis - El Manar, 2092, Tunis, Tunisia
- Laboratory of Extremophile Plants, Biotechnology Center of Borj Cédria, Box 901, 20150, Hammam-Lif, Tunis, Tunisia
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000, Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000, Ljubljana, Slovenia
- Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Mariem Wali
- Laboratory of Extremophile Plants, Biotechnology Center of Borj Cédria, Box 901, 20150, Hammam-Lif, Tunis, Tunisia
| | - Anja Kavčič
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000, Ljubljana, Slovenia
| | - Jana Padežnik Gomilšek
- Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000, Maribor, Slovenia
| | - Alojz Kodre
- Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
- Faculty for Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000, Ljubljana, Slovenia
| | - Mitja Kelemen
- Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Primož Vavpetič
- Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Primož Pelicon
- Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Chedly Abdelly
- Laboratory of Extremophile Plants, Biotechnology Center of Borj Cédria, Box 901, 20150, Hammam-Lif, Tunis, Tunisia
| | - Tahar Ghnaya
- Laboratory of Extremophile Plants, Biotechnology Center of Borj Cédria, Box 901, 20150, Hammam-Lif, Tunis, Tunisia.
- Higher Institute of Sciences and Techniques of Waters, University of Gabes, Erriadh City Campus - 6072 Zirig, Gabes, Tunisia.
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Hamzić Gregorčič S, Strojnik L, Potočnik D, Vogel-Mikuš K, Jagodic M, Camin F, Zuliani T, Ogrinc N. Can We Discover Truffle's True Identity? Molecules 2020; 25:E2217. [PMID: 32397327 PMCID: PMC7248893 DOI: 10.3390/molecules25092217] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 05/04/2020] [Accepted: 05/07/2020] [Indexed: 01/20/2023] Open
Abstract
This study used elemental and stable isotope composition to characterize Slovenian truffles and used multi-variate statistical analysis to classify truffles according to species and geographical origin. Despite the fact that the Slovenian truffles shared some similar characteristics with the samples originating from other countries, differences in the element concentrations suggest that respective truffle species may respond selectively to nutrients from a certain soil type under environmental and soil conditions. Cross-validation resulted in a 77% correct classification rate for determining the geographical origin and a 74% correct classification rate to discriminate between species. The critical parameters for geographical origin discriminations were Sr, Ba, V, Pb, Ni, Cr, Ba/Ca and Sr/Ca ratios, while from stable isotopes δ18O and δ13C values are the most important. The key variables that distinguish T.magnatum from other species are the levels of V and Zn and δ15N values. Tuber aestivum can be separated based on the levels of Ni, Cr, Mn, Mg, As, and Cu. This preliminary study indicates the possibility to differentiate truffles according to their variety and geographical origin and suggests widening the scope to include stable strontium isotopes.
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Affiliation(s)
- Staša Hamzić Gregorčič
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (S.H.G.); (L.S.); (D.P.); (M.J.); (T.Z.)
- Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - Lidija Strojnik
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (S.H.G.); (L.S.); (D.P.); (M.J.); (T.Z.)
- Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - Doris Potočnik
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (S.H.G.); (L.S.); (D.P.); (M.J.); (T.Z.)
- Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia;
| | - Marta Jagodic
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (S.H.G.); (L.S.); (D.P.); (M.J.); (T.Z.)
- Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - Federica Camin
- Department of Food Quality and Nutrition, Research and Innovation Centre, Fondazione Edmund Mach, 38010 San Michele all’Adige, Italy;
- Center Agriculture Food Environment (C3A), University of Trento, via Mach 1, 38010 San Michele all’Adige (TN), Italy
| | - Tea Zuliani
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (S.H.G.); (L.S.); (D.P.); (M.J.); (T.Z.)
- Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - Nives Ogrinc
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (S.H.G.); (L.S.); (D.P.); (M.J.); (T.Z.)
- Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
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19
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Höreth S, Pongrac P, van Elteren JT, Debeljak M, Vogel-Mikuš K, Weber M, Braun M, Pietzenuk B, Pečovnik M, Vavpetič P, Pelicon P, Arčon I, Krämer U, Clemens S. Arabidopsis halleri shows hyperbioindicator behaviour for Pb and leaf Pb accumulation spatially separated from Zn. New Phytol 2020; 226:492-506. [PMID: 31898330 DOI: 10.1111/nph.16373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 12/01/2019] [Indexed: 05/14/2023]
Abstract
Lead (Pb) ranks among the most problematic environmental pollutants. Background contamination of soils is nearly ubiquitous, yet plant Pb accumulation is barely understood. In a survey covering 165 European populations of the metallophyte Arabidopsis halleri, several field samples had indicated Pb hyperaccumulation, offering a chance to dissect plant Pb accumulation. Accumulation of Pb was analysed in A. halleri individuals from contrasting habitats under controlled conditions to rule out aerial deposition as a source of apparent Pb accumulation. Several elemental imaging techniques were employed to study the spatial distribution and ligand environment of Pb. Regardless of genetic background, A. halleri individuals showed higher shoot Pb accumulation than A. thaliana. However, dose-response curves revealed indicator rather than hyperaccumulator behaviour. Xylem sap data and elemental imaging unequivocally demonstrated the in planta mobility of Pb. Highest Pb concentrations were found in epidermal and vascular tissues. Distribution of Pb was distinct from that of the hyperaccumulated metal zinc. Most Pb was bound by oxygen ligands in bidentate coordination. A. halleri accumulates Pb whenever soil conditions render Pb phytoavailable. Considerable Pb accumulation under such circumstances, even in leaves of A. thaliana, strongly suggests that Pb can enter food webs and may pose a food safety risk.
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Affiliation(s)
- Stephan Höreth
- Department of Plant Physiology, University of Bayreuth, 95440, Bayreuth, Germany
| | - Paula Pongrac
- Department of Plant Physiology, University of Bayreuth, 95440, Bayreuth, Germany
- Jožef Stefan Institute, 1000, Ljubljana, Slovenia
| | | | - Marta Debeljak
- National Institute of Chemistry, 1000, Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Jožef Stefan Institute, 1000, Ljubljana, Slovenia
- Biotechnical Faculty, University of Ljubljana, 1000, Ljubljana, Slovenia
| | - Michael Weber
- Department of Plant Physiology, University of Bayreuth, 95440, Bayreuth, Germany
| | - Manuel Braun
- Department of Plant Physiology, University of Bayreuth, 95440, Bayreuth, Germany
| | - Björn Pietzenuk
- Molecular Genetics and Physiology of Plants, Ruhr University Bochum, 44801, Bochum, Germany
| | | | | | | | - Iztok Arčon
- Jožef Stefan Institute, 1000, Ljubljana, Slovenia
- University of Nova Gorica, 5000, Nova Gorica, Slovenia
| | - Ute Krämer
- Molecular Genetics and Physiology of Plants, Ruhr University Bochum, 44801, Bochum, Germany
| | - Stephan Clemens
- Department of Plant Physiology, University of Bayreuth, 95440, Bayreuth, Germany
- Bayreuth Center for Ecology and Environmental Research, University of Bayreuth, 95440, Bayreuth, Germany
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20
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Cominelli E, Galimberti M, Pongrac P, Landoni M, Losa A, Paolo D, Daminati MG, Bollini R, Cichy KA, Vogel-Mikuš K, Sparvoli F. Calcium redistribution contributes to the hard-to-cook phenotype and increases PHA-L lectin thermal stability in common bean low phytic acid 1 mutant seeds. Food Chem 2020; 321:126680. [PMID: 32247181 DOI: 10.1016/j.foodchem.2020.126680] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 03/16/2020] [Accepted: 03/21/2020] [Indexed: 11/27/2022]
Abstract
Seed phytic acid reduces mineral bioavailability by chelating minerals. Consumption of common bean seeds with the low phytic acid 1 (lpa1) mutation improved iron status in human trials but caused adverse gastrointestinal effects, presumably due to increased stability of lectin phytohemagglutinin L (PHA-L) compared to the wild type (wt). A hard-to-cook (HTC) defect observed in lpa1 seeds intensified this problem. We quantified the HTC phenotype of lpa1 common beans with three genetic backgrounds. The HTC phenotype in the lpa1 black bean line correlated with the redistribution of calcium particularly in the cell walls, providing support for the "phytase-phytate-pectin" theory of the HTC mechanism. Furthermore, the excess of free cations in the lpa1 mutation in combination with different PHA alleles affected the stability of PHA-L lectin.
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Affiliation(s)
- Eleonora Cominelli
- Institute of Agricultural Biology and Biotechnology, CNR, Via Bassini 15, 20133 Milan, Italy.
| | - Michela Galimberti
- Institute of Agricultural Biology and Biotechnology, CNR, Via Bassini 15, 20133 Milan, Italy
| | - Paula Pongrac
- Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Michela Landoni
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy.
| | - Alessia Losa
- Institute of Agricultural Biology and Biotechnology, CNR, Via Bassini 15, 20133 Milan, Italy.
| | - Dario Paolo
- Institute of Agricultural Biology and Biotechnology, CNR, Via Bassini 15, 20133 Milan, Italy.
| | - Maria Gloria Daminati
- Institute of Agricultural Biology and Biotechnology, CNR, Via Bassini 15, 20133 Milan, Italy.
| | - Roberto Bollini
- Institute of Agricultural Biology and Biotechnology, CNR, Via Bassini 15, 20133 Milan, Italy.
| | - Karen A Cichy
- Sugarbeet and Bean Research Unit, Agricultural Research Service, US Department of Agriculture, 1066 Bogue Street, Michigan State University, East Lansing, MI 48824, United States.
| | - Katarina Vogel-Mikuš
- Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; University of Ljubljana, Biotechnical Faculty, Department of Biology, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
| | - Francesca Sparvoli
- Institute of Agricultural Biology and Biotechnology, CNR, Via Bassini 15, 20133 Milan, Italy.
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21
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Torrent L, Iglesias M, Marguí E, Hidalgo M, Verdaguer D, Llorens L, Kodre A, Kavčič A, Vogel-Mikuš K. Uptake, translocation and ligand of silver in Lactuca sativa exposed to silver nanoparticles of different size, coatings and concentration. J Hazard Mater 2020; 384:121201. [PMID: 31586917 DOI: 10.1016/j.jhazmat.2019.121201] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/04/2019] [Accepted: 09/09/2019] [Indexed: 05/21/2023]
Abstract
The broad use of silver nanoparticles (AgNPs) in daily life products enhances their possibilities to reach the environment. Therefore, it is important to understand the uptake, translocation and biotransformation in plants and the toxicological impacts derived from these biological processes. In this work, Lactuca sativa (lettuce) was exposed during 9 days to different coated (citrate, polyvinylpyrrolidone, polyethylene glycol) and sized (60, 75, 100 nm) AgNPs at different concentrations (1, 3, 5, 7, 10, 15 mg L-1). Total silver measurements in lettuce roots indicated that accumulation of AgNPs is influenced by size and concentration, but not by nanoparticle coating. On the other hand, nanosilver translocation to shoots was more pronounced for neutral charged and large sized NPs at higher NP concentrations. Single particle inductively coupled plasma mass spectrometry analysis, after an enzymatic digestion of lettuce tissues indicated the dissolution of some NPs. Ag K-edge X-ray absorption spectroscopy analysis corroborated the AgNPs dissolution due to the presence of less Ag-Ag bonds and appearance of Ag-O and/or Ag-S bonds in lettuce roots. Toxicological effects on lettuces were observed after exposure to nanosilver, especially for transpiration and stomatal conductance. These findings indicated that AgNPs can enter to edible plants, exerting toxicological effects on them.
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Affiliation(s)
- Laura Torrent
- Department of Chemistry, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain
| | - Mònica Iglesias
- Department of Chemistry, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain.
| | - Eva Marguí
- Department of Chemistry, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain
| | - Manuela Hidalgo
- Department of Chemistry, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain
| | - Dolors Verdaguer
- Department of Environmental Sciences, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain
| | - Laura Llorens
- Department of Environmental Sciences, University of Girona, C/M.Aurèlia Capmany 69, 17003 Girona, Spain
| | - Alojz Kodre
- University of Ljubljana, Faculty for Mathematics and Physics, Jadranska 19, SI-1000 Ljubljana, Slovenia; Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Anja Kavčič
- University of Ljubljana, Biotechnical faculty, Department of Biology, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; University of Ljubljana, Biotechnical faculty, Department of Biology, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
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22
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Pongrac P, Arčon I, Castillo-Michel H, Vogel-Mikuš K. Mineral Element Composition in Grain of Awned and Awnletted Wheat ( Triticum aestivum L.) Cultivars: Tissue-Specific Iron Speciation and Phytate and Non-Phytate Ligand Ratio. Plants (Basel) 2020; 9:plants9010079. [PMID: 31936205 PMCID: PMC7020463 DOI: 10.3390/plants9010079] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/04/2020] [Accepted: 01/06/2020] [Indexed: 11/16/2022]
Abstract
In wheat (Triticum aestivum L.), the awns—the bristle-like structures extending from lemmas—are photosynthetically active. Compared to awned cultivars, awnletted cultivars produce more grains per unit area and per spike, resulting in significant reduction in grain size, but their mineral element composition remains unstudied. Nine awned and 11 awnletted cultivars were grown simultaneously in the field. With no difference in 1000-grain weight, a larger calcium and manganese—but smaller iron (Fe) concentrations—were found in whole grain of awned than in awnletted cultivars. Micro X-ray absorption near edge structure analysis of different tissues of frozen-hydrated grain cross-sections revealed that differences in total Fe concentration were not accompanied by differences in Fe speciation (64% of Fe existed as ferric and 36% as ferrous species) or Fe ligands (53% were phytate and 47% were non-phytate ligands). In contrast, there was a distinct tissue-specificity with pericarp containing the largest proportion (86%) of ferric species and nucellar projection (49%) the smallest. Phytate ligand was predominant in aleurone, scutellum and embryo (72%, 70%, and 56%, respectively), while nucellar projection and pericarp contained only non-phytate ligands. Assuming Fe bioavailability depends on Fe ligands, we conclude that Fe bioavailability from wheat grain is tissue specific.
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Affiliation(s)
- Paula Pongrac
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; (I.A.); (K.V.-M.)
- Correspondence: ; Tel.: +386-51-222-963; Fax: +386-477-31-51
| | - Iztok Arčon
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; (I.A.); (K.V.-M.)
- Laboratory for quantum optics, University of Nova Gorica, Vipavska 13, SI-5000 Nova Gorica, Slovenia
| | | | - Katarina Vogel-Mikuš
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; (I.A.); (K.V.-M.)
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
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23
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Kavčič A, Budič B, Vogel-Mikuš K. The effects of selenium biofortification on mercury bioavailability and toxicity in the lettuce-slug food chain. Food Chem Toxicol 2020; 135:110939. [PMID: 31697969 DOI: 10.1016/j.fct.2019.110939] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 10/26/2019] [Accepted: 11/01/2019] [Indexed: 12/20/2022]
Abstract
The effects of foliar Se biofortification (Se+) of the lettuce on the transfer and toxicity of Hg from soil contaminated with HgCl2 (H) and soil collected near the former Hg smelter in Idrija (I), to terrestrial food chain are explored, with Spanish slug as a primary consumer. Foliar application of Se significantly increased Se content in the lettuce, with no detected toxic effects. Mercury exerted toxic effects on plants, decreasing plant biomass, photochemical efficiency of the photosystem II (Fv/Fm) and the total chlorophyll content. Selenium biofortification (Se+ test group) had no effect on Hg bioaccumulation in plants. In slugs, different responses were observed in H and I groups; the I/Se+ subgroup was the most strongly affected by Hg toxicity, exhibiting lower biomass, feeding and growth rate and a higher hepatopancreas/ muscle Hg translocation, pointing to a higher Hg mobility in comparison to H group. Selenium increased Hg bioavailability for slugs, but with opposite physiological responses: alleviating stress in H/Se+ and inducing it in I/Se+ group, indicating different mechanisms of Hg-Se interactions in the food chain under HgCl2 and Idrija soil exposures that can be mainly attributed to different Hg speciation and ligand environment in the soil.
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Affiliation(s)
- Anja Kavčič
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000, Ljubljana, Slovenia.
| | - Bojan Budič
- National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana, Slovenia.
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000, Ljubljana, Slovenia; Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia.
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24
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Kavčič A, Mikuš K, Debeljak M, Teun van Elteren J, Arčon I, Kodre A, Kump P, Karydas AG, Migliori A, Czyzycki M, Vogel-Mikuš K. Localization, ligand environment, bioavailability and toxicity of mercury in Boletus spp. and Scutiger pes-caprae mushrooms. Ecotoxicol Environ Saf 2019; 184:109623. [PMID: 31518823 DOI: 10.1016/j.ecoenv.2019.109623] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 08/16/2019] [Accepted: 08/28/2019] [Indexed: 05/22/2023]
Abstract
This study provides information on mercury (Hg) localization, speciation and ligand environment in edible mushrooms: Boletus edulis, B. aereus and Scutiger pes-caprae collected at non-polluted and Hg polluted sites, by LA-ICP-MS, SR-μ-XRF and Hg L3-edge XANES and EXAFS. Mushrooms (especially young ones) collected at Hg polluted sites can contain more than 100 μg Hg g-1 of dry mass. Imaging of the element distribution shows that Hg accumulates mainly in the spore-forming part (hymenium) of the cap. Removal of hymenium before consumption can eliminate more than 50% of accumulated Hg. Mercury is mainly coordinated to di-thiols (43-82%), followed by di-selenols (13-35%) and tetra-thiols (12-20%). Mercury bioavailability, as determined by feeding the mushrooms to Spanish slugs (known metal bioindicators owing to accumulation of metals in their digestive gland), ranged from 4% (S. pes-caprae) to 30% (B. aereus), and decreased with increasing selenium (Se) levels in the mushrooms. Elevated Hg levels in mushrooms fed to the slugs induced toxic effects, but these effects were counteracted with increasing Se concentrations in the mushrooms, pointing to a protective role of Se against Hg toxicity through HgSe complexation. Nevertheless, consumption of the studied mushroom species from Hg polluted sites should be avoided.
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Affiliation(s)
- Anja Kavčič
- University of Ljubljana, Biotechnical Faculty, Department of Biology, Jamnikarjeva 101, SI-1000, Ljubljana, Slovenia
| | - Klemen Mikuš
- Biotechnical Educational Centre Ljubljana, Cesta V Mestni Log 47, SI-1000, Ljubljana, Slovenia
| | - Marta Debeljak
- National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana, Slovenia
| | | | - Iztok Arčon
- Jozef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia; University of Nova Gorica, Vipavska 13, SI-5000, Nova Gorica, Slovenia
| | - Alojz Kodre
- Jozef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia; University of Ljubljana, Faculty for Mathematics and Physics, Jadranska 19, SI-1000, Ljubljana, Slovenia
| | - Peter Kump
- Jozef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Andreas Germanos Karydas
- Institute of Nuclear and Particle Physics, National Centre for Scientific Research 'Demokritos', Patr. Grigoriou E' & 27 Neapoleos St, 153 41, Agia Paraskevi, Greece
| | - Alessandro Migliori
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444, Seibersdorf, Austria
| | - Mateusz Czyzycki
- Karlsruhe Institute of Technology, Institute for Photon Science and Synchrotron Radiation, Laboratory for Applications of Synchrotron Radiation, Kaiserstrasse 12, 76131, Karlsruhe, Germany; AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Al. Mickiewicza 30, 30-059, Krakow, Poland
| | - Katarina Vogel-Mikuš
- University of Ljubljana, Biotechnical Faculty, Department of Biology, Jamnikarjeva 101, SI-1000, Ljubljana, Slovenia; Jozef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia.
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25
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Jenčič B, Vavpetič P, Kelemen M, Vencelj M, Vogel-Mikuš K, Kavčič A, Pelicon P. MeV-SIMS TOF Imaging of Organic Tissue with Continuous Primary Beam. J Am Soc Mass Spectrom 2019; 30:1801-1812. [PMID: 31250317 DOI: 10.1007/s13361-019-02258-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/23/2019] [Accepted: 05/23/2019] [Indexed: 06/09/2023]
Abstract
MeV-SIMS is an emerging mass spectrometry imaging method, which utilizes fast, heavy ions to desorb secondary molecules. High yields and low fragmentation rates of large molecules, associated with the electronic sputtering process, make it particularly useful in biomedical research, where insight into distribution of organic molecules is needed. Since the implementation of MeV-SIMS in to the micro-beam line at the tandem accelerator of Jožef Stefan Institute, MeV-SIMS provided some valuable observations on the distribution of biomolecules in plant tissue, as discussed by Jenčič et al. (Nucl. Inst. Methods Phys. Res. B. 371, 205-210, 2016; Nucl. Inst. Methods Phys. Res. B. 404, 140-145, 2017). However, limited focusing ability of the chlorine ion beam only allowed imaging at the tissue level. In order to surpass shortcomings of the existing method, we introduced a new approach, where we employ a continuous, low-current primary beam. In this mode, we bombard thin samples with a steady chlorine ion flux of approx. 5000 ions/s. After desorbing molecules, chlorine ions penetrate through the thinly cut sample and trigger the time-of-flight "start" signal on a continuous electron multiplier detector, positioned behind the sample. Such bombardment is more effective than previously used pulsing-beam mode, which demanded several orders of magnitude higher primary ion beam currents. Sub-micrometer focusing of low-current primary ion beam allows imaging of biological tissue on a subcellular scale. Simultaneously, new time-of-flight acquisition approach also improves mass resolution by a factor of 5. Within the article, we compare the performance of both methods and demonstrate the application of continuous mode on biological tissue. We also describe the thin sample preparation protocol, necessary for measurements with low primary ion currents.
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Affiliation(s)
- Boštjan Jenčič
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Primož Vavpetič
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Mitja Kelemen
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Matjaž Vencelj
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia
- Biotechnical Faculty, Department of Biology, University of Ljubljana, Večna pot 11, SI-1000, Ljubljana, Slovenia
| | - Anja Kavčič
- Biotechnical Faculty, Department of Biology, University of Ljubljana, Večna pot 11, SI-1000, Ljubljana, Slovenia
| | - Primož Pelicon
- Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia.
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26
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Metarapi D, Šala M, Vogel-Mikuš K, Šelih VS, van Elteren JT. Nanoparticle Analysis in Biomaterials Using Laser Ablation-Single Particle-Inductively Coupled Plasma Mass Spectrometry. Anal Chem 2019; 91:6200-6205. [PMID: 30929434 PMCID: PMC6727186 DOI: 10.1021/acs.analchem.9b00853] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
![]()
In
the past decade, the development of single particle–inductively
coupled plasma mass spectrometry (SP-ICPMS) has revolutionized the
field of nanometallomics. Besides differentiation between dissolved
and particulate metal signals, SP-ICPMS can quantify the nanoparticle
(NP) number concentration and size. Because SP-ICPMS is limited to
characterization of NPs in solution, we show how solid sampling by
laser ablation (LA) adds spatial-resolution characteristics for localized
NP analysis in biomaterials. Using custom-made gelatin standards doped
with dissolved gold and commercial or synthesized gold nanoparticles,
LA-SP-ICPMS conditions such as laser fluence, beam size, and dwell
time were optimized for NP analysis to minimize NP degradation, peak
overlap, and interferences from dissolved gold. A data-processing
algorithm to retrieve the NP number concentration and size was developed
for this purpose. As a proof-of-concept, a sunflower-root-sample cross-section,
originating from a sunflower plant exposed to gold NPs, was successfully
imaged using the optimized LA-SP-ICPMS conditions for localized NP
characterization.
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Affiliation(s)
- Dino Metarapi
- Department of Analytical Chemistry , National Institute of Chemistry , Hajdrihova 19 , SI-1000 Ljubljana , Slovenia.,Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1001 Ljubljana , Slovenia
| | - Martin Šala
- Department of Analytical Chemistry , National Institute of Chemistry , Hajdrihova 19 , SI-1000 Ljubljana , Slovenia
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty , University of Ljubljana , Jamnikarjeva 101 , SI-1000 Ljubljana , Slovenia.,Jožef Stefan Institute , Jamova 39 , SI-1000 Ljubljana , Slovenia
| | - Vid S Šelih
- Department of Analytical Chemistry , National Institute of Chemistry , Hajdrihova 19 , SI-1000 Ljubljana , Slovenia
| | - Johannes T van Elteren
- Department of Analytical Chemistry , National Institute of Chemistry , Hajdrihova 19 , SI-1000 Ljubljana , Slovenia
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27
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Fourati E, Vogel-Mikuš K, Bettaieb T, Kavčič A, Kelemen M, Vavpetič P, Pelicon P, Abdelly C, Ghnaya T. Physiological response and mineral elements accumulation pattern in Sesuvium portulacastrum L. subjected in vitro to nickel. Chemosphere 2019; 219:463-471. [PMID: 30551113 DOI: 10.1016/j.chemosphere.2018.12.081] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 12/04/2018] [Accepted: 12/10/2018] [Indexed: 06/09/2023]
Abstract
Sesuvium portulacastrum, a halophyte with high tolerance to heavy metals like Cd, Pb and Ni is considered for phytoremediation of metal contaminated saline soils. The tolerance to a selected metal ion could, by hypothesis, be stimulated through in vitro adaptation and regeneration of the plant. Seedlings obtained by in vitro micro-propagation, were exposed to 0, 25 and 50 μM Ni, as NiCl2, in agar-based medium for 30 days. Growth parameters, plant water content, the concentration of photosynthetic pigments, proline and malondialdehyde (MDA) concentrations were determined. Nickel and nutrients distribution in leaves was studied by micro-Proton-Induced-X-ray-Emission (μ-PIXE). The results showed that Ni was mainly accumulated in vascular bundles, next in water storage tissues and chlorenchyma. Ni concentrations in chlorenchyma increased with increasing Ni in culturing medium, in direct relation to decrease of photosynthetic pigments and increase of oxidative stress. As compared to control plants, Ni induced substantial increase in MDA and proline accumulation. Plants exposed to 50 μM Ni accumulated up to 650 μg g-1 of Ni in the shoots, exhibiting chlorosis and necrosis and a drastically reduced plant growth. Perturbations in uptake and distribution of nutrients were observed, inducing mineral deficiency, probably through membrane leakage. The mineral nutrient disturbances induced by Ni could be highly implicated in the restriction of S. portulacastrum development under the acute 50 μM Ni level.
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Affiliation(s)
- Emna Fourati
- Université de Tunis El Manar, Tunisia; Centre de Biotechnologie de Borj Cedria (LR15CBBC02), Laboratoire des Plantes Extrèmophiles, BP 901 2050 Hammam-Lif, Tunisia; Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva, 101, SI-1000 Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva, 101, SI-1000 Ljubljana, Slovenia; Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Taoufik Bettaieb
- Département Agronomie et Biotechnologies Végétales, Institut National Agronomique de Tunisie, 43 Avenue Charles Nicolle, 1082 Tunis, Tunisia
| | - Anja Kavčič
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva, 101, SI-1000 Ljubljana, Slovenia
| | - Mitja Kelemen
- Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Primož Vavpetič
- Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Primož Pelicon
- Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Chedly Abdelly
- Centre de Biotechnologie de Borj Cedria (LR15CBBC02), Laboratoire des Plantes Extrèmophiles, BP 901 2050 Hammam-Lif, Tunisia
| | - Tahar Ghnaya
- Centre de Biotechnologie de Borj Cedria (LR15CBBC02), Laboratoire des Plantes Extrèmophiles, BP 901 2050 Hammam-Lif, Tunisia.
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28
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Grašič M, Malovrh U, Golob A, Vogel-Mikuš K, Gaberščik A. Effects of water availability and UV radiation on silicon accumulation in the C4 crop proso millet. Photochem Photobiol Sci 2019; 18:375-386. [DOI: 10.1039/c8pp00517f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In proso millet, water shortage reduced leaf silicon, calcium, phosphorus, and sulphur levels, and ambient ultraviolet radiation reinforced this effect.
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Affiliation(s)
- Mateja Grašič
- Department of Biology
- Biotechnical Faculty
- University of Ljubljana
- SI-1000 Ljubljana
- Slovenia
| | - Urša Malovrh
- Department of Biology
- Biotechnical Faculty
- University of Ljubljana
- SI-1000 Ljubljana
- Slovenia
| | - Aleksandra Golob
- Department of Biology
- Biotechnical Faculty
- University of Ljubljana
- SI-1000 Ljubljana
- Slovenia
| | - Katarina Vogel-Mikuš
- Department of Biology
- Biotechnical Faculty
- University of Ljubljana
- SI-1000 Ljubljana
- Slovenia
| | - Alenka Gaberščik
- Department of Biology
- Biotechnical Faculty
- University of Ljubljana
- SI-1000 Ljubljana
- Slovenia
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29
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Debeljak M, van Elteren JT, Špruk A, Izmer A, Vanhaecke F, Vogel-Mikuš K. The role of arbuscular mycorrhiza in mercury and mineral nutrient uptake in maize. Chemosphere 2018; 212:1076-1084. [PMID: 30286537 DOI: 10.1016/j.chemosphere.2018.08.147] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 08/22/2018] [Accepted: 08/28/2018] [Indexed: 06/08/2023]
Abstract
This work aimed to study the role of arbuscular mycorrhizal fungi (AMF) in Hg and major mineral nutrient uptake and tissue localization of these elements in the roots of maize plants. Maize plants were grown in pots filled with non- and Hg-contaminated substrate (50 μg Hg g-1 as HgCl2) and inoculated with two types of AMF inocula: a) Glomus sp. originating from Hg-polluted soil of a former Hg smelting site in Idrija, Slovenia, and b) commercial AM inoculum Symbivit. Controls were inoculated by corresponding bacterial extracts only. Tissue localization of Hg and major mineral nutrients was performed by laser ablation-inductively coupled plasma-mass spectroscopy (LA-ICP-MS) on cryofixed and freeze-dried root cross-sections. AMF colonization increased plant biomass in non-contaminated substrate, while this effect was not seen in Hg-contaminated substrate. Hg increased total plant biomass more than AMF inoculation, possibly through hormetic effects. AMF increased Hg uptake into the roots, as well as Hg transfer to the shoots. AMF affected plant mineral nutrient uptake, depending on the type of AMF inoculum and the presence of Hg. In the roots, Hg was mainly localized in rhizodermis and endodermis, followed by the cortex and the central cylinder. Higher Hg concentrations were detected in the central cylinder of AM plants than in that of the controls, pointing to a higher Hg mobility and potential bioavailability in AMF inoculated plants.
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Affiliation(s)
- Marta Debeljak
- Department of Analytical Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia
| | - Johannes T van Elteren
- Department of Analytical Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia
| | - Ana Špruk
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Andrei Izmer
- Department of Chemistry, Atomic & Mass Spectrometry A&MS Research Unit, Ghent University, Campus Sterre, Krijgslaan 281-S12, BE-9000 Ghent, Belgium
| | - Frank Vanhaecke
- Department of Chemistry, Atomic & Mass Spectrometry A&MS Research Unit, Ghent University, Campus Sterre, Krijgslaan 281-S12, BE-9000 Ghent, Belgium
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
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30
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Pongrac P, Serra TS, Castillo-Michel H, Vogel-Mikuš K, Arčon I, Kelemen M, Jenčič B, Kavčič A, Villafort Carvalho MT, Aarts MGM. Cadmium associates with oxalate in calcium oxalate crystals and competes with calcium for translocation to stems in the cadmium bioindicator Gomphrena claussenii. Metallomics 2018; 10:1576-1584. [DOI: 10.1039/c8mt00149a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Cd binds to oxalate crystals, where it replaces Ca in the vacuoles of a bioindicator plant Gomphrena clausenii.
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Affiliation(s)
- Paula Pongrac
- Biotechnical Faculty
- University of Ljubljana
- SI-1000 Ljubljana
- Slovenia
- Jožef Stefan Institute
| | - Tânia S. Serra
- Laboratory of Genetics
- Wageningen University and Research
- 6708 PB Wageningen
- The Netherlands
| | | | - Katarina Vogel-Mikuš
- Biotechnical Faculty
- University of Ljubljana
- SI-1000 Ljubljana
- Slovenia
- Jožef Stefan Institute
| | - Iztok Arčon
- Jožef Stefan Institute
- SI-1000 Ljubljana
- Slovenia
- University of Nova Gorica
- SI-5000 Nova Gorica
| | | | | | - Anja Kavčič
- Biotechnical Faculty
- University of Ljubljana
- SI-1000 Ljubljana
- Slovenia
| | | | - Mark G. M. Aarts
- Laboratory of Genetics
- Wageningen University and Research
- 6708 PB Wageningen
- The Netherlands
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31
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Karydas AG, Czyzycki M, Leani JJ, Migliori A, Osan J, Bogovac M, Wrobel P, Vakula N, Padilla-Alvarez R, Menk RH, Gol MG, Antonelli M, Tiwari MK, Caliri C, Vogel-Mikuš K, Darby I, Kaiser RB. An IAEA multi-technique X-ray spectrometry endstation at Elettra Sincrotrone Trieste: benchmarking results and interdisciplinary applications. J Synchrotron Radiat 2018; 25:189-203. [PMID: 29271768 DOI: 10.1107/s1600577517016332] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 11/13/2017] [Indexed: 06/07/2023]
Abstract
The International Atomic Energy Agency (IAEA) jointly with the Elettra Sincrotrone Trieste (EST) operates a multipurpose X-ray spectrometry endstation at the X-ray Fluorescence beamline (10.1L). The facility has been available to external users since the beginning of 2015 through the peer-review process of EST. Using this collaboration framework, the IAEA supports and promotes synchrotron-radiation-based research and training activities for various research groups from the IAEA Member States, especially those who have limited previous experience and resources to access a synchrotron radiation facility. This paper aims to provide a broad overview about various analytical capabilities, intrinsic features and performance figures of the IAEA X-ray spectrometry endstation through the measured results. The IAEA-EST endstation works with monochromatic X-rays in the energy range 3.7-14 keV for the Elettra storage ring operating at 2.0 or 2.4 GeV electron energy. It offers a combination of different advanced analytical probes, e.g. X-ray reflectivity, X-ray absorption fine-structure measurements, grazing-incidence X-ray fluorescence measurements, using different excitation and detection geometries, and thereby supports a comprehensive characterization for different kinds of nanostructured and bulk materials.
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Affiliation(s)
- Andreas Germanos Karydas
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Mateusz Czyzycki
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Juan José Leani
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Alessandro Migliori
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Janos Osan
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Mladen Bogovac
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Pawel Wrobel
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Al. A. Mickiewicza 30, 30-059 Krakow, Poland
| | - Nikita Vakula
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Roman Padilla-Alvarez
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Ralf Hendrik Menk
- Elettra-Sincrotrone Trieste SCpA di Interesse Nazionale, 34149 Basovizza, Trieste, Italy
| | - Maryam Ghahremani Gol
- Institute for Research in Fundamental Sciences (IPM), Iranian Light Source Facility (ILSF), Larak Building (Garden), PO Box 19568-36484, Tehran, Iran
| | - Matias Antonelli
- Elettra-Sincrotrone Trieste SCpA di Interesse Nazionale, 34149 Basovizza, Trieste, Italy
| | - Manoj K Tiwari
- Synchrotrons Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India
| | - Claudia Caliri
- Laboratori Nazionali del Sud, INFN, Via Santa Sofia 62, Catania 95123, Italy
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, Ljubljana, Slovenia
| | - Iain Darby
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
| | - Ralf Bernd Kaiser
- Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444 Seibersdorf, Austria
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32
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Kovačec E, Regvar M, van Elteren JT, Arčon I, Papp T, Makovec D, Vogel-Mikuš K. Biotransformation of copper oxide nanoparticles by the pathogenic fungus Botrytis cinerea. Chemosphere 2017; 180:178-185. [PMID: 28407547 DOI: 10.1016/j.chemosphere.2017.04.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 04/03/2017] [Accepted: 04/04/2017] [Indexed: 05/15/2023]
Abstract
Two plant pathogenic fungi, Botrytis cinerea and Alternaria alternata, isolated from crop plants, were exposed to Cu in ionic (Cu2+), microparticulate (MP, CuO) or nanoparticulate (NP, Cu or CuO) form, in solid and liquid culturing media in order to test fungal response and toxic effects of the mentioned compounds for the potential use as fungicides. B. cinerea has shown pronounced growth and lower levels of lipid peroxidation compared to A. alternata. Its higher resistance/tolerance is attributed mainly to biotransformation of CuO and Cu NPs and CuO MPs into a blue compound at the fungal/culturing media interface, recognized by Cu K-edge EXAFS analysis as Cu-oxalate complex. The pronounced activity of catechol-type siderophores and organic acid secretion in B. cinerea induce leaching and mobilization of Cu ions from the particles and their further complexation with extracellularly secreted oxalic acid. The ability of pathogenic fungus to biotransform CuO MPs and NPs hampers their use as fungicides. However the results show that B. cinerea has a potential to be used in degradation of Cu(O) nanoparticles in environment, copper extraction and purification techniques.
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Affiliation(s)
- Eva Kovačec
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, Ljubljana, Slovenia
| | - Marjana Regvar
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, Ljubljana, Slovenia
| | | | - Iztok Arčon
- University of Nova Gorica, Vipavska 13, Nova Gorica, Slovenia; Jožef Stefan Institute, Jamova cesta 39, Ljubljana, Slovenia
| | - Tamás Papp
- MTA-SZTE Fungal Pathogenicity Mechanisms Research Group, 6726 Szeged, Kozep fasor 52, Hungary
| | - Darko Makovec
- Jožef Stefan Institute, Jamova cesta 39, Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, Ljubljana, Slovenia; Jožef Stefan Institute, Jamova cesta 39, Ljubljana, Slovenia.
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33
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Likar M, Luthar Z, Kocjan Ačko D, Škrabanja V, Vombergar B, Kušar A, Pravst I, Gaberščik A, Golob A, Germ M, Kreft I, Regvar M, Teun van Elteren J, Nečemer M, Vavpetič P, Pelicon P, Vogel-Mikuš K, Zhou M, Pongrac P. NEW INSIGHTS INTO STRUCTURES AND COMPOSITION OF PLANT FOOD MATERIALS. J microb biotech food sci 2017. [DOI: 10.15414/jmbfs.2017.7.1.57-61] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The aim of this paper is to review principles and potential application of micro-proton induced X-ray emission (micro-PIXE), synchrotron-based micro-X-ray fluorescence (micro-XRF) and inductively coupled plasma-mass spectrometry (ICP-MS) hyphenated with pulsed laser ablation (LA) for analysing plants and plant materials to elucidate feature of constituensts of nutritional value. These are required in order to develop novel high-quality functional and other food products in view of the variability of properties of plant tissues and products.
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34
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Mantouvalou I, Lachmann T, Singh SP, Vogel-Mikuš K, Kanngießer B. Advanced Absorption Correction for 3D Elemental Images Applied to the Analysis of Pearl Millet Seeds Obtained with a Laboratory Confocal Micro X-ray Fluorescence Spectrometer. Anal Chem 2017; 89:5453-5460. [DOI: 10.1021/acs.analchem.7b00373] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ioanna Mantouvalou
- Institute
for Optics and Atomic Physics, Technical University of Berlin, 10623 Berlin, Germany
| | - Tim Lachmann
- Institute
for Optics and Atomic Physics, Technical University of Berlin, 10623 Berlin, Germany
| | - Sudhir P. Singh
- Center of Innovative and Applied Bioprocessing India, Mohali, Punjab India - 160071
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia
- Jozef Stefan Institute, 1000 Ljubljana, Slovenia
| | - Birgit Kanngießer
- Institute
for Optics and Atomic Physics, Technical University of Berlin, 10623 Berlin, Germany
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35
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Golob A, Kavčič J, Stibilj V, Gaberščik A, Vogel-Mikuš K, Germ M. The effect of selenium and UV radiation on leaf traits and biomass production in Triticum aestivum L. Ecotoxicol Environ Saf 2017; 136:142-149. [PMID: 27865114 DOI: 10.1016/j.ecoenv.2016.11.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/09/2016] [Accepted: 11/12/2016] [Indexed: 05/17/2023]
Abstract
UV radiation as an evolutionarily important environmental factor, significantly affects plants traits and alters the effects of other environmental factors. Single and combined effects of ambient UV radiation, its exclusion, and Se foliar treatments on Si concentrations and production of Si phytoliths in wheat (Triticum aestivum L.) cv. 'Reska' were studied. The effects of these treatments on growth parameters of the plants, structural and biochemical traits of the leaves, and interactions of the leaves with light, as Si incrustation is the first barrier to light at the leaf surface were also examined. Under ambient UV radiation and foliar treatment with 10mgL-1 sodium selenate solution, there was a trade-off between the plant investment in primary and secondary metabolism, as the production of UV-absorbing compounds was enhanced while photosynthetic pigment levels were reduced. Independent of Se treatment, ambient UV radiation lowered respiratory potential, Ca concentration, and leaf thickness, and increased Si concentration, Si phytoliths formation, and cuticle thickness. The Se treatment has little effect on plant traits and biomass production but it increased Se concentrations in the plants by >100-fold, independent of UV radiation. In combination with UV radiation Se strengthen the protection of plants against stress by increasing the amount of UV absorbing compounds, light reflectance and transmittance.
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Affiliation(s)
- Aleksandra Golob
- University of Ljubljana, Biotechnical Faculty, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
| | - Jan Kavčič
- University of Ljubljana, Biotechnical Faculty, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | | | - Alenka Gaberščik
- University of Ljubljana, Biotechnical Faculty, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- University of Ljubljana, Biotechnical Faculty, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Mateja Germ
- University of Ljubljana, Biotechnical Faculty, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
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36
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Fourati E, Wali M, Vogel-Mikuš K, Abdelly C, Ghnaya T. Nickel tolerance, accumulation and subcellular distribution in the halophytes Sesuvium portulacastrum and Cakile maritima. Plant Physiol Biochem 2016; 108:295-303. [PMID: 27479784 DOI: 10.1016/j.plaphy.2016.07.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 07/25/2016] [Accepted: 07/26/2016] [Indexed: 05/23/2023]
Abstract
It has been shown that halophytes are able to successfully cope with heavy metal toxicity, suggesting their possible use for remediation of metal contaminated soils. In this work, Ni tolerance and accumulation in two halophytes, Sesuvium portulacastrum (L.) L. and Cakile maritima Scop. was investigated. Seedlings of both species were subjected hydroponically during 21 days to 0, 25, 50, and 100 μM of NiCl2. The growth and photosynthesis parameters revealed that S. portulacastrum tolerates Ni better than C. maritima. The photosynthesis activity, chlorophyll content and photosystem II integrity were less impacted in Ni-treated S. portulacastrum as compared to C. maritima, although, Ni accumulated in higher concentrations in the shoots of S. portulacastrum (1050 μg g-1 DW) than in those of C. maritima (550 μg g-1 DW). The subcellular fractionation of Ni in the shoots of both species showed that C. maritima accumulated about 65% of Ni in the soluble fraction, while 28% was associated with the cell walls. In S. portulacastrum 44% of the total cellular Ni was seen in the soluble fraction and 43% was bound to the cell walls. It can be concluded that S. portulacastrum tolerates Ni better than C. maritima, most probably due to a better ability to sequester Ni in the cell walls, restricting its accumulation in the soluble fraction.
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Affiliation(s)
- Emna Fourati
- Université de Tunis El Manar, BP 901, 2050 Hammam-Lif, Tunisia; Centre de Biotechnologie de Borj Cedria (LR15CBBC02), Laboratoire des Plantes Extrèmophiles, BP 901, 2050 Hammam-Lif, Tunisia; Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Mariem Wali
- Université de Tunis El Manar, BP 901, 2050 Hammam-Lif, Tunisia; Centre de Biotechnologie de Borj Cedria (LR15CBBC02), Laboratoire des Plantes Extrèmophiles, BP 901, 2050 Hammam-Lif, Tunisia
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; Jozef Stefan Institute, Jamova 39, Ljubljana, Slovenia
| | - Chedly Abdelly
- Centre de Biotechnologie de Borj Cedria (LR15CBBC02), Laboratoire des Plantes Extrèmophiles, BP 901, 2050 Hammam-Lif, Tunisia
| | - Tahar Ghnaya
- Centre de Biotechnologie de Borj Cedria (LR15CBBC02), Laboratoire des Plantes Extrèmophiles, BP 901, 2050 Hammam-Lif, Tunisia.
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37
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Zidar P, Kos M, Vogel-Mikuš K, van Elteren JT, Debeljak M, Žižek S. Impact of ionophore monensin on performance and Cu uptake in earthworm Eisenia andrei exposed to copper-contaminated soil. Chemosphere 2016; 161:119-126. [PMID: 27424053 DOI: 10.1016/j.chemosphere.2016.07.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 06/17/2016] [Accepted: 07/04/2016] [Indexed: 06/06/2023]
Abstract
Exposure of beneficial soil organisms to chemical mixtures is of great concern and can result in unexpected deleterious consequences. We investigated the effects of concurrent soil contamination with monensin, a veterinary pharmaceutical and feed additive, and copper, on earthworm copper uptake and reproductive success. The animals were exposed for 14 or 28 days to both substances and the results showed that the Cu body burden of earthworms increases in the presence of monensin. The harmful effects of Cu on earthworm cocoon production were considerably higher when monensin was also present in the soil. To localise the copper in earthworm tissues, histological staining was performed using two different dyes (rubeanic acid and 5-4-(p-dimethylaminobenzylidene)-rhodanine). Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was used to quantify the Cu levels in the tissues. Cu was found predominantly in the gut wall. The Cu content in the body wall was at least ten times lower compared to the gut, but was proportional to the level of soil contamination. Concurrent soil contamination with monensin and copper resulted in higher earthworm Cu levels and in decreased reproductive success of these important soil decomposers.
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Affiliation(s)
- Primož Zidar
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna Pot 111, SI-1000, Ljubljana, Slovenia.
| | - Monika Kos
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna Pot 111, SI-1000, Ljubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna Pot 111, SI-1000, Ljubljana, Slovenia
| | - Johannes Teun van Elteren
- Analytical Chemistry Laboratory, National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana, Slovenia
| | - Marta Debeljak
- Analytical Chemistry Laboratory, National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana, Slovenia
| | - Suzana Žižek
- Laboratory for Environmental Research, University of Nova Gorica, Vipavska 13, SI-5000, Nova Gorica, Slovenia
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Panighello S, Kavčič A, Vogel-Mikuš K, Tennent NH, Wallert A, Hočevar SB, van Elteren JT. Investigation of smalt in cross-sections of 17th century paintings using elemental mapping by laser ablation ICP-MS. Microchem J 2016. [DOI: 10.1016/j.microc.2015.11.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abstract
In order to maintain homeostasis and consequent optimal cell functioning and integrity and/or to avoid toxicity, proper allocation of elements at organ, tissue, cellular and subcellular level is needed. Studies of element localization are therefore crucial to reveal the mechanisms of element trafficking and also tolerance and toxicity. Moreover, studies of localization and speciation of trace elements in grains of staple crops are also of high applicative value, allowing one to determine major and trace element concentrations in different grain tissues without possible contamination. In the last decade, a remarkable progress has been made in the development and application of different 2D imaging techniques in complex biological systems, especially in the sense of improved lateral resolution and sensitivity. The superiority of micro-PIXE over other 2D imaging techniques lies in its wide elemental range (from sodium (Na) to uranium (U)), high elemental sensitivity below micron spatial resolution and fully quantitative element concentration analysis. The aim of this review is to summarize the latest development of micro-PIXE for imaging of the distribution of major and trace elements in crop plants with emphasis on sample preparation methodologies and post-imaging analysis. Case studies of element localization in the grains of major crop plants are also presented.
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Affiliation(s)
- Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
- Department of Low and Medium Energy Physics, Jožef Stefan Institute, Reactor Center, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Paula Pongrac
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Primož Pelicon
- Department of Low and Medium Energy Physics, Jožef Stefan Institute, Reactor Center, Jamova 39, SI-1000 Ljubljana, Slovenia
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Arčon I, Paganelli S, Piccolo O, Gallo M, Vogel-Mikuš K, Baldi F. XAS analysis of iron and palladium bonded to a polysaccharide produced anaerobically by a strain of Klebsiella oxytoca. J Synchrotron Radiat 2015; 22:1215-1226. [PMID: 26289273 DOI: 10.1107/s1600577515010371] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 05/29/2015] [Indexed: 06/04/2023]
Abstract
Klebsiella oxytoca BAS-10 ferments citrate to acetic acid and CO2, and secretes a specific exopolysaccharide (EPS), which is able to bind different metallic species. These biomaterials may be used for different biotechnological purposes, including applications as innovative green biogenerated catalysts. In production of biogenerated Pd species, the Fe(III) as ferric citrate is added to anaerobic culture of K. oxytoca BAS-10, in the presence of palladium species, to increase the EPS secretion and improve Pd-EPS yield. In this process, bi-metallic (FePd-EPS) biomaterials were produced for the first time. The morphology of bi-metallic EPS, and the chemical state of the two metals in the FePd-EPS, are investigated by transmission electron microscopy, Fourier transform infra-red spectroscopy, micro-X-ray fluorescence, and X-ray absorption spectroscopy methods (XANES and EXAFS), and compared with mono-metallic Pd-EPS and Fe-EPS complexes. Iron in FePd-EPS is in the mineralized form of iron oxides/hydroxides, predominantly in the form of Fe(3+), with a small amount of Fe(2+) in the structure, most probably a mixture of different nano-crystalline iron oxides and hydroxides, as in mono-metallic Fe-EPS. Palladium is found as Pd(0) in the form of metallic nanoparticles with face-centred cubic structure in both bi-metallic (FePd-EPS) and mono-metallic (Pd-EPS) species. In bi-metallic species, Pd and Fe nanoparticles agglomerate in larger clusters, but they remain spatially separated. The catalytic ability of bi-metallic species (FePd-EPS) in a hydrodechlorination reaction is improved in comparison with mono-metallic Pd-EPS.
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Affiliation(s)
- Iztok Arčon
- University of Nova Gorica, Vipavska 13, Nova Gorica 5000, Slovenia
| | - Stefano Paganelli
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Cà Foscari, Via Torino 155, 30170 Venezia-Mestre, Italy
| | - Oreste Piccolo
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Cà Foscari, Via Torino 155, 30170 Venezia-Mestre, Italy
| | - Michele Gallo
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Cà Foscari, Via Torino 155, 30170 Venezia-Mestre, Italy
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, Ljubljana 1000, Slovenia
| | - Franco Baldi
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Cà Foscari, Via Torino 155, 30170 Venezia-Mestre, Italy
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Likar M, Vogel-Mikuš K, Potisek M, Hančević K, Radić T, Nečemer M, Regvar M. Importance of soil and vineyard management in the determination of grapevine mineral composition. Sci Total Environ 2015; 505:724-31. [PMID: 25461075 DOI: 10.1016/j.scitotenv.2014.10.057] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 10/17/2014] [Accepted: 10/17/2014] [Indexed: 04/15/2023]
Abstract
The spatial variability of the mineral composition of grapevines in production vineyards along the east Adriatic coast was determined and compared between conventional and sustainable vineyard management. Cluster analysis shows a high level of spatial variability even within the individual locations. Factor analysis reveals three factors with strong loading for the macronutrients K and P and the micronutrient Mn, which explain 67% of the total variance in the mineral composition. Here, 26% to 34% of the variance of these three elements can be explained by abiotic and biotic soil parameters, with soil concentrations of K, Fe and Cu, organic matter content, and vesicular colonisation showing the strongest effects on the mineral composition of the grapevines. In addition, analysis of the mineral composition data shows significant differences between differently managed vineyards, with increased bioaccumulation of P and K in sustainable vineyards, while Zn bioaccumulation was increased in conventional vineyards. Our data confirm the importance of soil and vineyard management in the concept of terroir, and demonstrate the effects of sustainable management practices on the mineral nutrition of grapevines that result from modified nutrient availability related to changes in the abiotic and biotic characteristics of the soil.
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Affiliation(s)
- M Likar
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 Ljubljana, Slovenia.
| | - K Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 Ljubljana, Slovenia
| | - M Potisek
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 Ljubljana, Slovenia
| | - K Hančević
- Institute for Adriatic Crops and Karst Reclamation, Put Duilova 11, 21000 Split, Croatia
| | - T Radić
- Institute for Adriatic Crops and Karst Reclamation, Put Duilova 11, 21000 Split, Croatia
| | - M Nečemer
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - M Regvar
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 Ljubljana, Slovenia
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Klančnik K, Vogel-Mikuš K, Kelemen M, Vavpetič P, Pelicon P, Kump P, Jezeršek D, Gianoncelli A, Gaberščik A. Leaf optical properties are affected by the location and type of deposited biominerals. J Photochem Photobiol B 2014; 140:276-85. [PMID: 25194526 DOI: 10.1016/j.jphotobiol.2014.08.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 07/22/2014] [Accepted: 08/14/2014] [Indexed: 11/18/2022]
Abstract
This study aimed to relate the properties of incrusted plant tissues and structures as well as biomineral concentrations and localization with leaf reflectance and transmittance spectra from 280nm to 880nm in the grasses Phragmites australis, Phalaris arundinacea, Molinia caerulea and Deschampsia cespitosa, and the sedge Carex elata. Redundancy analysis revealed that prickle-hair length on adaxial surface and thickness of lower epidermis exerted significant effects in P. australis; prickle-hair density at abaxial leaf surface and thickness of epidermis on adaxial leaf surface in P. arundinacea; thickness of epidermis on adaxial leaf in D. cespitosa; prickle-hair density on adaxial leaf surface and thickness of cuticle in M. caerulea; and prickle-hair density on adaxial leaf surface and cuticle thickness of the lower side in C. elata. Micro-PIXE and LEXRF elemental localization analysis show that all of these structures and tissues are encrusted by Si and/or by Ca. Reflectance spectra were significantly affected by the Ca concentrations, while Si and Mg concentrations and the Ca concentrations significantly affected transmittance spectra. High concentrations of Mg were detected in epidermal vacuoles of P. arundinacea, M. caerulea and D. cespitosa. Al co-localises with Si in the cuticle, epidermis and/or prickle hairs.
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Affiliation(s)
- Katja Klančnik
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
| | - Katarina Vogel-Mikuš
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
| | - Mitja Kelemen
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Primož Vavpetič
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Primož Pelicon
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Peter Kump
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - David Jezeršek
- Elettra-Sincrotrone Trieste, S.S. 14 km 163.5, Area Science Park, 34012 Basovizza, Trieste, Italy
| | - Alessandra Gianoncelli
- Elettra-Sincrotrone Trieste, S.S. 14 km 163.5, Area Science Park, 34012 Basovizza, Trieste, Italy
| | - Alenka Gaberščik
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
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Singh SP, Vogel-Mikuš K, Vavpetič P, Jeromel L, Pelicon P, Kumar J, Tuli R. Spatial X-ray fluorescence micro-imaging of minerals in grain tissues of wheat and related genotypes. Planta 2014; 240:277-289. [PMID: 24817589 DOI: 10.1007/s00425-014-2084-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 04/17/2014] [Indexed: 06/03/2023]
Abstract
Wheat and its related genotypes show distinct distribution patterns for mineral nutrients in maternal and filial tissues in grains. X-ray-based imaging techniques are very informative to identify genotypes with contrasting tissue-specific localization of different elements. This can help in the selection of suitable genotypes for nutritional improvement of food grain crops. Understanding mineral localization in cereal grains is important for their nutritional improvement. Spatial distribution of mineral nutrients (Mg, P, S, K, Ca, Fe, Zn, Mn and Cu) was investigated between and within the maternal and filial tissues in grains of two wheat cultivars (Triticum aestivum Cv. WH291 and WL711), a landrace (T. aestivum L. IITR26) and a related wild species Aegilops kotschyi, using micro-proton-induced X-ray emission (µ-PIXE) and micro-X-ray fluorescence (µ-XRF). Aleurone and scutellum were major storage tissues for macro (P, K, Ca and Mg) as well as micro (Fe, Zn, Cu and Mn) nutrients. Distinct elemental distribution patterns were observed in each of the four genotypes. A. kotschyi, the wild relative of wheat and the landrace, T. aestivum L. IITR26, accumulated more Zn and Fe in scutellum and aleurone than the cultivated wheat varieties, WH291 and WL711. The landrace IITR26, accumulated far more S in grains, Mn in scutellum, aleurone and embryo region, Ca and Cu in aleurone and scutellum, and Mg, K and P in scutellum than the other genotypes. Unlike wheat, lower Mn and higher Fe, Cu and Zn concentrations were noticed in the pigment strand of A. kotschyi. Multivariate statistical analysis, performed on mineral distribution in major grain tissues (aleurone, scutellum, endosperm and embryo region) resolved the four genotypes into distinct clusters.
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Affiliation(s)
- Sudhir P Singh
- National Agri-Food Biotechnology Institute, Department of Biotechnology (DBT), C-127, Industrial Area, Phase VIII, Mohali, 160071, India,
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Lefèvre I, Vogel-Mikuš K, Jeromel L, Vavpetič P, Planchon S, Arčon I, Van Elteren JT, Lepoint G, Gobert S, Renaut J, Pelicon P, Lutts S. Differential cadmium and zinc distribution in relation to their physiological impact in the leaves of the accumulating Zygophyllum fabago L. Plant Cell Environ 2014; 37:1299-320. [PMID: 24237383 DOI: 10.1111/pce.12234] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 10/20/2013] [Accepted: 10/21/2013] [Indexed: 05/12/2023]
Abstract
Cadmium and zinc share many similar physiochemical properties, but their compartmentation, complexation and impact on other mineral element distribution in plant tissues may drastically differ. In this study, we address the impact of 10 μm Cd or 50 μm Zn treatments on ion distribution in leaves of a metallicolous population of the non-hyperaccumulating species Zygophyllum fabago at tissue and cell level, and the consequences on the plant response through a combined physiological, proteomic and metabolite approach. Micro-proton-induced X-ray emission and laser ablation inductively coupled mass spectrometry analyses indicated hot spots of Cd concentrations in the vicinity of vascular bundles in response to Cd treatment, essentially bound to S-containing compounds as revealed by extended X-ray absorption fine structure and non-protein thiol compounds analyses. A preferential accumulation of Zn occurred in vascular bundle and spongy mesophyll in response to Zn treatment, and was mainly bound to O/N-ligands. Leaf proteomics and physiological status evidenced a protection of photosynthetically active tissues and the maintenance of cell turgor through specific distribution and complexation of toxic ions, reallocation of some essential elements, synthesis of proteins involved in photosynthetic apparatus or C-metabolism, and metabolite synthesis with some specificities regarding the considered heavy metal treatment.
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Affiliation(s)
- Isabelle Lefèvre
- Groupe de Recherche en Physiologie végétale (GRPV), Earth and Life Institute - Agronomy (ELI-A), Université catholique de Louvain, Croix du Sud 4-5, bte L7.07.13, 1348, Louvain-la-Neuve, Belgium
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El-Jendoubi H, Vázquez S, Calatayud Á, Vavpetič P, Vogel-Mikuš K, Pelicon P, Abadía J, Abadía A, Morales F. The effects of foliar fertilization with iron sulfate in chlorotic leaves are limited to the treated area. A study with peach trees (Prunus persica L. Batsch) grown in the field and sugar beet (Beta vulgaris L.) grown in hydroponics. Front Plant Sci 2014; 5:2. [PMID: 24478782 PMCID: PMC3895801 DOI: 10.3389/fpls.2014.00002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 01/02/2014] [Indexed: 05/09/2023]
Abstract
Crop Fe deficiency is a worldwide problem. The aim of this study was to assess the effects of foliar Fe applications in two species grown in different environments: peach (Prunus persica L. Batsch) trees grown in the field and sugar beet (Beta vulgaris L. cv. "Orbis") grown in hydroponics. The distal half of Fe-deficient, chlorotic leaves was treated with Fe sulfate by dipping and using a brush in peach trees and sugar beet plants, respectively. The re-greening of the distal (Fe-treated) and basal (untreated) leaf areas was monitored, and the nutrient and photosynthetic pigment composition of the two areas were also determined. Leaves were also studied using chlorophyll fluorescence imaging, low temperature-scanning electron microscopy microanalysis, scanning transmission ion microscopy-particle induced X-ray emission and Perls Fe staining. The distal, Fe-treated leaf parts of both species showed a significant increase in Fe concentrations (across the whole leaf volume) and marked re-greening, with significant increases in the concentrations of all photosynthetic pigments, as well as decreases in de-epoxidation of xanthophyll cycle carotenoids and increases in photochemical efficiency. In the basal, untreated leaf parts, Fe concentrations increased slightly, but little re-greening occurred. No changes in the concentrations of other nutrients were found. Foliar Fe fertilization was effective in re-greening treated leaf areas both in peach trees and sugar beet plants. Results indicate that the effects of foliar Fe-sulfate fertilization in Fe-deficient, chlorotic leaves were minor outside the leaf surface treated, indicating that Fe mobility within the leaf is a major constraint for full fertilizer effectiveness in crops where Fe-deficiency is established and leaf chlorosis occurs.
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Affiliation(s)
- Hamdi El-Jendoubi
- Department of Plant Nutrition, Aula Dei Experimental Station (CSIC)Zaragoza, Spain
| | - Saúl Vázquez
- Department of Plant Nutrition, Aula Dei Experimental Station (CSIC)Zaragoza, Spain
| | - Ángeles Calatayud
- Departamento de Horticultura, Instituto Valenciano de Investigaciones AgrariasValencia, Spain
| | - Primož Vavpetič
- Department of Low and Medium Energy Physics, Jožef Stefan InstituteLjubljana, Slovenia
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of LjubljanaLjubljana, Slovenia
| | - Primož Pelicon
- Department of Low and Medium Energy Physics, Jožef Stefan InstituteLjubljana, Slovenia
| | - Javier Abadía
- Department of Plant Nutrition, Aula Dei Experimental Station (CSIC)Zaragoza, Spain
| | - Anunciación Abadía
- Department of Plant Nutrition, Aula Dei Experimental Station (CSIC)Zaragoza, Spain
| | - Fermín Morales
- Department of Plant Nutrition, Aula Dei Experimental Station (CSIC)Zaragoza, Spain
- *Correspondence: Fermín Morales, Department of Plant Nutrition, Aula Dei Experimental Station (CSIC), Av. Montañana 1005, PO Box 13034, E-50080 Zaragoza, Spain e-mail:
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Pongrac P, Vogel-Mikuš K, Jeromel L, Vavpetič P, Pelicon P, Kaulich B, Gianoncelli A, Eichert D, Regvar M, Kreft I. Spatially resolved distributions of the mineral elements in the grain of tartary buckwheat (Fagopyrum tataricum). Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.06.020] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Klančnik K, Vogel-Mikuš K, Gaberščik A. Silicified structures affect leaf optical properties in grasses and sedge. J Photochem Photobiol B 2013; 130:1-10. [PMID: 24231391 DOI: 10.1016/j.jphotobiol.2013.10.011] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Revised: 09/08/2013] [Accepted: 10/15/2013] [Indexed: 11/29/2022]
Abstract
Silicon (Si) is an important structural element that can accumulate at high concentrations in grasses and sedges, and therefore Si structures might affect the optical properties of the leaves. To better understand the role of Si in light/leaf interactions in species rich in Si, we examined the total Si and silica phytoliths, the biochemical and morphological leaf properties, and the reflectance and transmittance spectra in grasses (Phragmites australis, Phalaris arundinacea, Molinia caerulea, Deschampsia cespitosa) and sedge (Carex elata). We show that these grasses contain >1% phytoliths per dry mass, while the sedge contains only 0.4%. The data reveal the variable leaf structures of these species and significant differences in the amount of Si and phytoliths between developing and mature leaves within each species and between grasses and sedge, with little difference seen among the grass species. Redundancy analysis shows the significant roles of the different near-surface silicified leaf structures (e.g., prickle hairs, cuticle, epidermis), phytoliths and Si contents, which explain the majority of the reflectance and transmittance spectra variability. The amount of explained variance differs between mature and developing leaves. The transmittance spectra are also significantly affected by chlorophyll a content and calcium levels in the leaf tissue.
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Affiliation(s)
- Katja Klančnik
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia.
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia.
| | - Alenka Gaberščik
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia.
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48
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Han R, Quinet M, André E, van Elteren JT, Destrebecq F, Vogel-Mikuš K, Cui G, Debeljak M, Lefèvre I, Lutts S. Accumulation and distribution of Zn in the shoots and reproductive structures of the halophyte plant species Kosteletzkya virginica as a function of salinity. Planta 2013; 238:441-457. [PMID: 23728368 DOI: 10.1007/s00425-013-1903-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 05/18/2013] [Indexed: 06/02/2023]
Abstract
Kosteletzkya virginica is a wetland halophyte that is a good candidate for rehabilitation of degraded salt marshes and production of oil as biodiesel. Salt marshes are frequently contaminated by heavy metals. The distribution of Zn in vegetative and reproductive organs of adult plants, and the NaCl influence on this distribution remain unknown and were thus explored in the present study. Plants were cultivated in a nutrient film technique system, from seedling stage until seed maturation in a control, Zn (100 μM), NaCl (50 mM) or Zn + NaCl medium. Photosynthesis, ion nutrition, malondialdehyde and non-protein thiol concentrations were quantified. Zinc distribution in reproductive organs was estimated by a laser ablation-inductively coupled plasma-mass spectrometry procedure (LA-ICP-MS). Adult plants accumulated up to 2 mg g(-1) DW Zn in the shoots. Zinc reduced plant growth, inhibited photosynthesis and reduced seed yield. Zinc accumulation in the seeds was only two times higher in Zn-treated plants than in controls. Exogenous NaCl neutralized the damaging action of Zn and modified the Zn distribution through a preferential accumulation of toxic ions in older leaves. Zinc was present in seed testa, endosperm and, to a lower extent, in embryo. Additional NaCl induced a chalazal retention of Zn during seed maturation and reduced final Zn seed content. It is concluded that NaCl 50 mM had a positive impact on the response of K. virginica to Zn toxicity and acts through a modification in Zn distribution rather than a decrease in Zn absorption.
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Affiliation(s)
- Ruiming Han
- Groupe de Recherche en Physiologie végétale (GRPV), Earth and Life Institute-Agronomy (ELI-A), Université catholique de Louvain, 5 (bte 7.07.13) Place Croix du Sud, 1348, Louvain-la-Neuve, Belgium
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49
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Singh SP, Vogel-Mikuš K, Arčon I, Vavpetič P, Jeromel L, Pelicon P, Kumar J, Tuli R. Pattern of iron distribution in maternal and filial tissues in wheat grains with contrasting levels of iron. J Exp Bot 2013; 64:3249-60. [PMID: 23918965 PMCID: PMC3733147 DOI: 10.1093/jxb/ert160] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Iron insufficiency is a worldwide problem in human diets. In cereals like wheat, the bran layer of the grains is an important source of iron. However, the dietary availability of iron in wheat flour is limited due to the loss of the iron-rich bran during milling and processing and the presence of anti-nutrients like phytic acid that keep iron strongly chelated in the grain. The present study investigated the localization of iron and phosphorus in grain tissues of wheat genotypes with contrasting grain iron content using synchrotron-based micro-X-ray fluorescence (micro-XRF) and micro-proton-induced X-ray emission (micro-PIXE). X-ray absorption near-edge spectroscopy (XANES) was employed to determine the proportion of divalent and trivalent forms of Fe in the grains. It revealed the abundance of oxygen, phosphorus, and sulphur in the local chemical environment of Fe in grains, as Fe-O-P-R and Fe-O-S-R coordination. Contrasting differences were noticed in tissue-specific relative localization of Fe, P, and S among the different genotypes, suggesting a possible effect of localization pattern on iron bioavailability. The current study reports the shift in iron distribution from maternal to filial tissues of grains during the evolution of wheat from its wild relatives to the present-day cultivated varieties, and thus suggests the value of detailed physical localization studies in varietal improvement programmes for food crops.
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Affiliation(s)
- Sudhir P. Singh
- National Agri-Food Biotechnology Institute, Department of Biotechnology, C-127, Industrial Area, Phase-8, Mohali 160071, India
| | - Katarina Vogel-Mikuš
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia
| | - Iztok Arčon
- University of Nova Gorica, Vipavska 13, POB 301, SI-5001 Nova Gorica, Slovenia
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Primož Vavpetič
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Luka Jeromel
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Primož Pelicon
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Jitendra Kumar
- National Agri-Food Biotechnology Institute, Department of Biotechnology, C-127, Industrial Area, Phase-8, Mohali 160071, India
| | - Rakesh Tuli
- National Agri-Food Biotechnology Institute, Department of Biotechnology, C-127, Industrial Area, Phase-8, Mohali 160071, India
- * To whom correspondence should be addressed. E-mail:
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Debeljak M, van Elteren JT, Vogel-Mikuš K. Development of a 2D laser ablation inductively coupled plasma mass spectrometry mapping procedure for mercury in maize (Zea mays L.) root cross-sections. Anal Chim Acta 2013; 787:155-62. [DOI: 10.1016/j.aca.2013.05.053] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 05/28/2013] [Accepted: 05/31/2013] [Indexed: 11/27/2022]
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