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Floating treatment wetlands (FTWs), consisting of vegetated rafts, may reduce heavy metal levels in polluted water, but the choice of plant species for efficient metal removal needs to be further investigated. We screened the capacity of 34 wetland plant species to remove metals dissolved in water to identify suitable species for FTWs. The plants were grown hydroponically for 5 days in a solution containing 1.2 µg Cd L−1, 68.5 µg Cu L−1, 78.4 µg Pb L−1, and 559 µg Zn L−1. Results show large variation in metal removal rate and capacity between the investigated species. The species with highest removal capacity could remove up to 52–94% of the metals already after 0.5 h of exposure and up to 98–100% of the metals after 5 days of exposure. Plant size contributed more to high removal capacity than did removal per unit of fine roots. Carex pseudocyperus and C. riparia were the most efficient and versatile species. The findings of this study should be considered as a starting point for further investigation of plant selection for improved water purification by FTWs.
Maria Schück; Maria Greger. Screening the Capacity of 34 Wetland Plant Species to Remove Heavy Metals from Water. International Journal of Environmental Research and Public Health 2020, 17, 4623 .
AMA StyleMaria Schück, Maria Greger. Screening the Capacity of 34 Wetland Plant Species to Remove Heavy Metals from Water. International Journal of Environmental Research and Public Health. 2020; 17 (13):4623.
Chicago/Turabian StyleMaria Schück; Maria Greger. 2020. "Screening the Capacity of 34 Wetland Plant Species to Remove Heavy Metals from Water." International Journal of Environmental Research and Public Health 17, no. 13: 4623.
Silicon (Si) was long listed as a non-essential component for plant growth and development because of its universal availability. However, there has been a resurgence of interest in studying the underlying uptake and transport mechanism of silicon in plants because of the reported dynamic role of silicon in plants under stressed environmental conditions. This uptake and transport mechanism is greatly dependent upon the uptake ability of the plant’s roots. Plant roots absorb Si in the form of silicic acid from the soil solution, and it is moved through different parts of the plant using various influx and efflux transporters. Both these influx and efflux transporters are mostly found in the plasma membrane; however, their location and pattern of expression varies among different plants. The assessment of these features provides a new understanding of different species-dependent Si accumulations, which have been studied in monocots but are poorly understood in other plant groups. Therefore, the present review provides insight into the most recent research exploring the use of Si transporters in angiosperms and cryptogams. This paper presents an extensive representation of data from different families of angiosperms, including monocots and eudicots. Eudicots (previously referred to as dicots) have often been neglected in the literature, because they are categorized as low/intermediate Si accumulators. However, in this review, we attempt to highlight the accumulating species of different plant groups in which Si uptake is mediated through transporters.
Harmanjit Kaur; Maria Greger. A Review on Si Uptake and Transport System. Plants 2019, 8, 81 .
AMA StyleHarmanjit Kaur, Maria Greger. A Review on Si Uptake and Transport System. Plants. 2019; 8 (4):81.
Chicago/Turabian StyleHarmanjit Kaur; Maria Greger. 2019. "A Review on Si Uptake and Transport System." Plants 8, no. 4: 81.
Phytofiltration of arsenic (As)-contaminated water could reduce As in irrigation and surface water. In a previous study, we found that the aquatic moss Warnstorfia fluitans efficiently removes arsenic from water contaminated with arsenate and arsenite. This work investigates how factors such as pH, temperature, and oxygenation influence As removal, since these factors vary in the environment. Plants were grown in a medium with 5 or 10 μM arsenite or arsenate and: 1) a pH of 2.5, 6.5, or 9.5; 2) a temperature of 12, 20, or 30 °C; and 3) oxygenation of <2 or 13 mg O2 L−1. Removal of As was monitored over 48–96 h, and the content and speciation of As were analysed in moss plants at the termination of the experiments. Results indicate that As removal was faster in arsenite than arsenate solutions. Arsenic removal from arsenite solution was the fastest, i.e., 80–90% within 2 h, at pH 6.5 and 9.5 and at 20 and 30 °C. At pH 2.5, plants were stressed and the net removal was low throughout the treatment period. Arsenic removal was more efficient at low than high oxygenation levels. Besides this, no As net efflux process was seen in the water system except after 48 h in arsenate-treated medium in high-temperature (30 °C) regimes. Regardless of As species added, usually only arsenite was found in the plants after treatment. Most internal As, i.e., 95% in the arsenate and 85% in the arsenite treatments, was firmly bound to the tissue. The study found that at 20 °C, neutral pH, and low oxygenation, this aquatic moss has great potential for As phytofiltration.
Arifin Sandhi; Tommy Landberg; Maria Greger. Effect of pH, temperature, and oxygenation on arsenic phytofiltration by aquatic moss (Warnstorfia fluitans). Journal of Environmental Chemical Engineering 2018, 6, 3918 -3925.
AMA StyleArifin Sandhi, Tommy Landberg, Maria Greger. Effect of pH, temperature, and oxygenation on arsenic phytofiltration by aquatic moss (Warnstorfia fluitans). Journal of Environmental Chemical Engineering. 2018; 6 (4):3918-3925.
Chicago/Turabian StyleArifin Sandhi; Tommy Landberg; Maria Greger. 2018. "Effect of pH, temperature, and oxygenation on arsenic phytofiltration by aquatic moss (Warnstorfia fluitans)." Journal of Environmental Chemical Engineering 6, no. 4: 3918-3925.
Silicon (Si) effects on mineral nutrient status in plants are not well investigated. It is known that Si has a beneficial effect on plants under stressed conditions. The aim was to make a state of the art investigation of the Si influence: (1) on nutrient availability in four different soil types, namely clayish, sandy, alum shale and submerged soil; and (2) on accumulation of various nutrients in maize, lettuce, pea, carrot and wheat growing in hydroponics. Soil was treated with K2SiO3 corresponding to 80 and 1000 kg Si ha−1 and the nutrient medium with 100, 500, 1000 and 5000 μM Si. In general, Si effects were similar in all analyzed plant species and in all soil types tested. Results showed that, in soil, Si increased the availability of Ca, P, S, Mn, Zn, Cu and Mo and that of Cl and Fe tended to increase. The availability of K and Mg was not much affected by Si. Uptake from solution of S, Mg, Ca, B, Fe, and Mn increased; N, Cu, Zn and K decreased; P decreased/increased; and Cl and Mo was not influenced. Translocation to shoot of Mg, Ca, S, Mn, and Mo increased; Fe, Cu and Zn decreased; and K, P, N, Cl and B was not affected. It was concluded that, if plants had been cultivated in soil, Si-maintained increased availability of nutrients in the soil solution would probably compensate for the decrease in tissue concentration of those nutrient elements. The study shows that Si also influences the nutrient uptake in non-stressed plants.
Maria Greger; Tommy Landberg; Marek Vaculík. Silicon Influences Soil Availability and Accumulation of Mineral Nutrients in Various Plant Species. Plants 2018, 7, 41 .
AMA StyleMaria Greger, Tommy Landberg, Marek Vaculík. Silicon Influences Soil Availability and Accumulation of Mineral Nutrients in Various Plant Species. Plants. 2018; 7 (2):41.
Chicago/Turabian StyleMaria Greger; Tommy Landberg; Marek Vaculík. 2018. "Silicon Influences Soil Availability and Accumulation of Mineral Nutrients in Various Plant Species." Plants 7, no. 2: 41.
This paper reviews the most recent progress in exploring silicon-mediated resistance to herbivorous insects and the mechanisms involved. The aim is to determine whether any mechanism seems more common than the others as well as whether the mechanisms are more pronounced in silicon-accumulating than non-silicon-accumulating species or in monocots than eudicots. Two types of mechanisms counter insect pest attacks: physical or mechanical barriers and biochemical/molecular mechanisms (in which Si can upregulate and prime plant defence pathways against insects). Although most studies have examined high Si accumulators, both accumulators and non-accumulators of silicon as well as monocots and eudicots display similar Si defence mechanisms against insects.
Fadi Alhousari; Maria Greger. Silicon and Mechanisms of Plant Resistance to Insect Pests. Plants 2018, 7, 33 .
AMA StyleFadi Alhousari, Maria Greger. Silicon and Mechanisms of Plant Resistance to Insect Pests. Plants. 2018; 7 (2):33.
Chicago/Turabian StyleFadi Alhousari; Maria Greger. 2018. "Silicon and Mechanisms of Plant Resistance to Insect Pests." Plants 7, no. 2: 33.
Silicon (Si) fertilization improves crop cultivation and is commonly added in the form of soluble silicates. However, most natural plant-available Si originates from plant formed amorphous SiO particles, phytoliths, similar to SiO-nanoparticles (SiNP). In this work we, therefore, compared the effect by sodium silicate and that of SiNP on Si accumulation, activity of antioxidative stress enzymes catalase, peroxidase, superoxide dismutase, lignification of xylem cell walls and activity of phenylalanine ammonia-lyase (PAL) as well as expression of genes for the putative silicon transporter (PST), defensive (Tfgd 1) and phosphoenolpyruvate carboxykinase (PEPCK) and protein in fenugreek (Trigonella foenum-graecum L.) grown in hydroponics. The results showed that Si was taken up from both silicate and SiNP treatments and increasing sodium silicate addition increased the translocation of Si to the shoot, while this was not shown with increasing SiNP addition. The silicon transporter PST was upregulated at a greater level when sodium silicate was added compared with SiNP addition. There were no differences in effects between sodium silicate and SiNP treatments on the other parameters measured. Both treatments increased the uptake and accumulation of Si, xylem cell wall lignification, cell wall thickness, PAL activity and protein concentration in seedlings, while there was no effect on antioxidative enzyme activity. Tfgd 1 expression was strongly downregulated in leaves at Si addition. The similarity in effects by silicate and SiNP would be due to that SiNP releases silicate, which may be taken up, shown by a decrease in SiNP particle size with time in the medium.
Sanam Nazaralian; Ahmad Majd; Saeed Irian; Farzaneh Najafi; Farrokh Ghahremaninejad; Tommy Landberg; Maria Greger. Comparison of silicon nanoparticles and silicate treatments in fenugreek. Plant Physiology and Biochemistry 2017, 115, 25 -33.
AMA StyleSanam Nazaralian, Ahmad Majd, Saeed Irian, Farzaneh Najafi, Farrokh Ghahremaninejad, Tommy Landberg, Maria Greger. Comparison of silicon nanoparticles and silicate treatments in fenugreek. Plant Physiology and Biochemistry. 2017; 115 ():25-33.
Chicago/Turabian StyleSanam Nazaralian; Ahmad Majd; Saeed Irian; Farzaneh Najafi; Farrokh Ghahremaninejad; Tommy Landberg; Maria Greger. 2017. "Comparison of silicon nanoparticles and silicate treatments in fenugreek." Plant Physiology and Biochemistry 115, no. : 25-33.
Cadmium (Cd) is a health threat all over the world and high Cd content in wheat causes high Cd intake. Silicon (Si) decreases cadmium content in wheat grains and shoot. This work investigates whether and how silicate (Si) influences cadmium (Cd) uptake at the cellular level in wheat. Wheat seedlings were grown in the presence or absence of Si with or without Cd. Cadmium, Si, and iron (Fe) accumulation in roots and shoots was analysed. Leaf protoplasts from plants grown without Cd were investigated for Cd uptake in the presence or absence of Si using the fluorescent dye, Leadmium Green AM. Roots and shoots of plants subjected to all four treatments were investigated regarding the expression of genes involved in the Cd uptake across the plasma membrane (i.e. LCT1) and efflux of Cd into apoplasm or vacuole from the cytosol (i.e. HMA2). In addition, phytochelatin (PC) content and PC gene (PCS1) expression were analysed. Expression of iron and metal transporter genes (IRT1 and NRAMP1) were also analysed. Results indicated that Si reduced Cd accumulation in plants, especially in shoot. Si reduced Cd transport into the cytoplasm when Si was added both directly during the uptake measurements and to the growth medium. Silicate downregulated LCT1 and HMA2 and upregulated PCS1. In addition, Si enhanced PC formation when Cd was present. The IRT1 gene, which was downregulated by Cd was upregulated by Si in root and shoot facilitating Fe transport in wheat. NRAMP1 was similarly expressed, though the effect was limited to roots. This work is the first to show how Si influences Cd uptake on the cellular level.
Maria Greger; Ahmad H. Kabir; Tommy Landberg; Pooja J. Maity; Sylvia Lindberg. Silicate reduces cadmium uptake into cells of wheat. Environmental Pollution 2016, 211, 90 -97.
AMA StyleMaria Greger, Ahmad H. Kabir, Tommy Landberg, Pooja J. Maity, Sylvia Lindberg. Silicate reduces cadmium uptake into cells of wheat. Environmental Pollution. 2016; 211 ():90-97.
Chicago/Turabian StyleMaria Greger; Ahmad H. Kabir; Tommy Landberg; Pooja J. Maity; Sylvia Lindberg. 2016. "Silicate reduces cadmium uptake into cells of wheat." Environmental Pollution 211, no. : 90-97.
This study investigates, under field conditions, whether silicon (Si) addition reduces the accumulation of Cd and As in the edible parts of potato, carrot, onion, and wheat plants. Plants were grown in commercial plantations on alum shale soil in Hedmark County, Norway. Silicon, 500 kg per ha, was added in several forms for comparison: 1) potassium silicate solution, 2) Microsilica, an amorphous SiO2, and 3) Solaritt, a mixture of CaSiO3, Ca3Si2O7, and CaO. The concentrations of Si, Cd, and As were analysed in the edible plant parts and in the total and available soil fractions. Results indicate that Si addition increased the Si content by 12–28 % and reduced the Cd and As contents by 10–25 % and 20–40 %, respectively, in the edible parts of all investigated plants. In the soil, available Si increased up to 10-fold with Si addition while available As and Cd did not change. Potassium silicate and Microsilica had the highest effects due to the high plant availability of their Si content in soil. We conclude that increased plant-available soil Si reduces the As and Cd contents in edible parts of the investigated species and is not due to decreased As and Cd availability in the soil.
Maria Greger; Tommy Landberg. Silicon Reduces Cadmium and Arsenic Levels in Field-Grown Crops. Silicon 2015, 11, 2371 -2375.
AMA StyleMaria Greger, Tommy Landberg. Silicon Reduces Cadmium and Arsenic Levels in Field-Grown Crops. Silicon. 2015; 11 (5):2371-2375.
Chicago/Turabian StyleMaria Greger; Tommy Landberg. 2015. "Silicon Reduces Cadmium and Arsenic Levels in Field-Grown Crops." Silicon 11, no. 5: 2371-2375.
Cadmium (Cd) is a health hazard, and up to 43% of human Cd intake comes from wheat products, since Cd accumulates in wheat grains. Salix spp. are high-accumulators of Cd and is suggested for Cd phytoextraction from agricultural soils. We demonstrate, in field, that Salix viminalis can remove Cd from agricultural soils and thereby reduce Cd accumulation in grains of wheat subsequently grown in a Salix-treated field. Four years of Salix cultivation reduce Cd concentration in the soil by up to 27% and in grains of the post-cultivated wheat by up to 33%. The higher the plant density of the Salix, the greater the Cd removal from the soil and the lower the Cd concentration in the grains of post-cultivated wheat, the Cd reduction remaining stable several years after Salix cultivation. The effect occurred in both sandy and clayey soil and in winter and spring bread wheat cultivars. Already one year of Salix cultivation significantly decrease Cd in post grown wheat grains. With this field experiment we have demonstrated that phytoextraction can reduce accumulation of a pollutant in post-cultivated wheat and that phytoextraction has no other observed effect on post-cultivated crops than reduced uptake of the removed pollutant.
Maria Greger; Tommy Landberg. Novel Field Data on Phytoextraction: Pre-Cultivation WithSalixReduces Cadmium in Wheat Grains. International Journal of Phytoremediation 2015, 17, 917 -924.
AMA StyleMaria Greger, Tommy Landberg. Novel Field Data on Phytoextraction: Pre-Cultivation WithSalixReduces Cadmium in Wheat Grains. International Journal of Phytoremediation. 2015; 17 (10):917-924.
Chicago/Turabian StyleMaria Greger; Tommy Landberg. 2015. "Novel Field Data on Phytoextraction: Pre-Cultivation WithSalixReduces Cadmium in Wheat Grains." International Journal of Phytoremediation 17, no. 10: 917-924.
Our earlier investigations showed that Elodea canadensis shoots, grown in the presence of cadmium (Cd), caused basification of the surrounding medium. The present study was aimed to examine the proton dynamics of the apoplastic, cytosolic and vacuolar regions of E. canadensis leaves upon Cd exposure and to establish possible linkage between cellular pH changes and the medium basification. The changes in cytosolic calcium [Ca(2+)]cyt was also investigated as the [Ca(2+)]cyt and [pH]cyt homeostasis are closely linked. The cellular H(+) and Ca(2+) concentrations were monitored by fluorescence microscopy and ion-specific fluorescent dyes. Cadmium concentration of leaf-cell walls was measured after plant cultivation at different fixed levels of starting pH. The protoplasts from E. canadensis leaves were isolated by use of a newly developed enzymatic method. Upon Cd addition, both cytosolic and vacuolar pH of leaf protoplasts increased with a concomitant rise in the cytosolic Ca(2+) concentration. Time course studies revealed that changes in [Ca(2+)]cyt and [pH]cyt followed similar dynamics. Cadmium (0.5 μM) exposure decreased the apoplastic pH by 0.85 units. The maximum cell wall bound Cd-contents were obtained in plants grown at low starting pH. It is concluded that Cd treatment causes apoplastic acidosis in E. canadensis leaves associated with enhanced Cd binding to the cell walls and, consequently, reduced Cd influx into the cytosol.
M. Tariq Javed; Sylvia Lindberg; Maria Greger. Cellular proton dynamics in Elodea canadensis leaves induced by cadmium. Plant Physiology and Biochemistry 2014, 77, 15 -22.
AMA StyleM. Tariq Javed, Sylvia Lindberg, Maria Greger. Cellular proton dynamics in Elodea canadensis leaves induced by cadmium. Plant Physiology and Biochemistry. 2014; 77 ():15-22.
Chicago/Turabian StyleM. Tariq Javed; Sylvia Lindberg; Maria Greger. 2014. "Cellular proton dynamics in Elodea canadensis leaves induced by cadmium." Plant Physiology and Biochemistry 77, no. : 15-22.
The presence of Eriophorum angustifolium in mine tailings of pyrite maintains a neutral pH, despite weathering, thus lowering the release of toxic elements into acid mine drainage water. We investigated if the presence of slightly elevated levels of free toxic elements triggers the plant rhizosphere to change the pH towards neutral by increasing organic acid contents. Plants were treated with a combination of As, Pb, Cu, Cd, and Zn at different concentrations in nutrient medium and in soil in a rhizobox-like system for 48–120 h. The pH and organic acids were detected in the mucilage dissolved from root surface, reflecting the rhizospheric solution. Also the pH of root–cell apoplasm was investigated. Both apoplasmic and mucilage pH increased and the concentrations of organic acids enhanced in the mucilage with slightly elevated levels of toxic elements. When organic acids concentration was high, also the pH was high. Thus, efflux of organic acids from the roots of E. angustifolium may induce rhizosphere basification.
M. Tariq Javed; Eva Stoltz; Sylvia Lindberg; Maria Greger. Changes in pH and organic acids in mucilage of Eriophorum angustifolium roots after exposure to elevated concentrations of toxic elements. Environmental Science and Pollution Research 2012, 20, 1876 -1880.
AMA StyleM. Tariq Javed, Eva Stoltz, Sylvia Lindberg, Maria Greger. Changes in pH and organic acids in mucilage of Eriophorum angustifolium roots after exposure to elevated concentrations of toxic elements. Environmental Science and Pollution Research. 2012; 20 (3):1876-1880.
Chicago/Turabian StyleM. Tariq Javed; Eva Stoltz; Sylvia Lindberg; Maria Greger. 2012. "Changes in pH and organic acids in mucilage of Eriophorum angustifolium roots after exposure to elevated concentrations of toxic elements." Environmental Science and Pollution Research 20, no. 3: 1876-1880.
Tommy Landberg; Maria Greger. No phytochelatin (PC2 and PC3) detected in Salix viminalis. Physiologia Plantarum 2004, 121, 481 -487.
AMA StyleTommy Landberg, Maria Greger. No phytochelatin (PC2 and PC3) detected in Salix viminalis. Physiologia Plantarum. 2004; 121 (3):481-487.
Chicago/Turabian StyleTommy Landberg; Maria Greger. 2004. "No phytochelatin (PC2 and PC3) detected in Salix viminalis." Physiologia Plantarum 121, no. 3: 481-487.
Tommy Landberg; Maria Greger. Interclonal variation of heavy metal interactions in Salix viminalis. Environmental Toxicology and Chemistry 2002, 21, 1 .
AMA StyleTommy Landberg, Maria Greger. Interclonal variation of heavy metal interactions in Salix viminalis. Environmental Toxicology and Chemistry. 2002; 21 (12):1.
Chicago/Turabian StyleTommy Landberg; Maria Greger. 2002. "Interclonal variation of heavy metal interactions in Salix viminalis." Environmental Toxicology and Chemistry 21, no. 12: 1.
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Tommy Landberg; Maria Greger. INTERCLONAL VARIATION OF HEAVY METAL INTERACTIONS IN SALIX VIMINALIS. Environmental Toxicology and Chemistry 2002, 21, 2669 -2674.
AMA StyleTommy Landberg, Maria Greger. INTERCLONAL VARIATION OF HEAVY METAL INTERACTIONS IN SALIX VIMINALIS. Environmental Toxicology and Chemistry. 2002; 21 (12):2669-2674.
Chicago/Turabian StyleTommy Landberg; Maria Greger. 2002. "INTERCLONAL VARIATION OF HEAVY METAL INTERACTIONS IN SALIX VIMINALIS." Environmental Toxicology and Chemistry 21, no. 12: 2669-2674.
Sylvia Lindberg; Krystyna Szynkier; Maria Greger. Aluminum effects on transmembrane potential in root cells of spruce in relation to pH and growth temperature. Journal of Plant Nutrition 1998, 21, 975 -985.
AMA StyleSylvia Lindberg, Krystyna Szynkier, Maria Greger. Aluminum effects on transmembrane potential in root cells of spruce in relation to pH and growth temperature. Journal of Plant Nutrition. 1998; 21 (5):975-985.
Chicago/Turabian StyleSylvia Lindberg; Krystyna Szynkier; Maria Greger. 1998. "Aluminum effects on transmembrane potential in root cells of spruce in relation to pH and growth temperature." Journal of Plant Nutrition 21, no. 5: 975-985.
Tommy Landberg; Maria Greger. Influence of selenium on uptake and toxicity of copper and cadmium in pea (Pisum sativum) and wheat (Triticum aestivum). Physiologia Plantarum 1994, 90, 637 -644.
AMA StyleTommy Landberg, Maria Greger. Influence of selenium on uptake and toxicity of copper and cadmium in pea (Pisum sativum) and wheat (Triticum aestivum). Physiologia Plantarum. 1994; 90 (4):637-644.
Chicago/Turabian StyleTommy Landberg; Maria Greger. 1994. "Influence of selenium on uptake and toxicity of copper and cadmium in pea (Pisum sativum) and wheat (Triticum aestivum)." Physiologia Plantarum 90, no. 4: 637-644.
Sylvia Lindberg; Krystyna Szynkier; Maria Greger. Aluminium effects on transmembrane potential in cells of fibrous roots of sugar beet. Physiologia Plantarum 1991, 83, 54 -62.
AMA StyleSylvia Lindberg, Krystyna Szynkier, Maria Greger. Aluminium effects on transmembrane potential in cells of fibrous roots of sugar beet. Physiologia Plantarum. 1991; 83 (1):54-62.
Chicago/Turabian StyleSylvia Lindberg; Krystyna Szynkier; Maria Greger. 1991. "Aluminium effects on transmembrane potential in cells of fibrous roots of sugar beet." Physiologia Plantarum 83, no. 1: 54-62.
Sylvia Lindberg; Krystyna Szynkier; Maria Greger. Aluminium effects on transmembrane potential in cells of fibrous roots of sugar beet. Physiologia Plantarum 1991, 83, 54 -62.
AMA StyleSylvia Lindberg, Krystyna Szynkier, Maria Greger. Aluminium effects on transmembrane potential in cells of fibrous roots of sugar beet. Physiologia Plantarum. 1991; 83 (1):54-62.
Chicago/Turabian StyleSylvia Lindberg; Krystyna Szynkier; Maria Greger. 1991. "Aluminium effects on transmembrane potential in cells of fibrous roots of sugar beet." Physiologia Plantarum 83, no. 1: 54-62.
Maria Greger; Sylvia Lindberg. Effects of Cd2+ and EDTA on young sugar beets (Beta vulgaris). II. Net uptake and distribution of Mg2+, Ca2+ and Fe2+/Fe3+. Physiologia Plantarum 1987, 69, 81 -86.
AMA StyleMaria Greger, Sylvia Lindberg. Effects of Cd2+ and EDTA on young sugar beets (Beta vulgaris). II. Net uptake and distribution of Mg2+, Ca2+ and Fe2+/Fe3+. Physiologia Plantarum. 1987; 69 (1):81-86.
Chicago/Turabian StyleMaria Greger; Sylvia Lindberg. 1987. "Effects of Cd2+ and EDTA on young sugar beets (Beta vulgaris). II. Net uptake and distribution of Mg2+, Ca2+ and Fe2+/Fe3+." Physiologia Plantarum 69, no. 1: 81-86.
Sugar beets (Beta vulgaris L. cv. Monohill) grown in a complete nutrient solution, were treated with Cd2+ (5 or 50 μM) and/or EDTA (10 or 100 μM) in different combinations. The Cd contents of five‐week‐old roots and shoots were determined by atomic absorption spectrophotometry, and the sucrose, glucose and fructose contents were measured enzymatically. The Cd2+ uptake in both roots and shoots shows a linear relationship to the concentration of free Cd2+ in the nutrient solution. This uptake is diminished in the presence of EDTA, suggesting that the Cd‐EDTA complex is unable to penetrate the membranes. The contents of glucose, fructose and sucrose in both roots and shoots decrease with increasing uptake of free Cd2+. This may be a secondary effect caused by the inhibition of photosynthesis in the presence of Cd2+. EDTA reduces the inhibition of Cd2+ on sugar formation and accumulation. In the presence of EDTA alone the sugar content increases somewhat. EDTA slightly influences the dry weights of whole plants. The ratio roots:whole plants increases. Cd2+ (≤ 50 μM) increases the dry matter portion of roots by ca 30%, but not that of shoots.
Maria Greger; Sylvia Lindberg. Effects of Cd2+ and EDTA on young sugar beets (Beta vulgaris). I. Cd2+ uptake and sugar accumulation. Physiologia Plantarum 1986, 66, 69 -74.
AMA StyleMaria Greger, Sylvia Lindberg. Effects of Cd2+ and EDTA on young sugar beets (Beta vulgaris). I. Cd2+ uptake and sugar accumulation. Physiologia Plantarum. 1986; 66 (1):69-74.
Chicago/Turabian StyleMaria Greger; Sylvia Lindberg. 1986. "Effects of Cd2+ and EDTA on young sugar beets (Beta vulgaris). I. Cd2+ uptake and sugar accumulation." Physiologia Plantarum 66, no. 1: 69-74.