heavy metal toxicity and uptake in plants

... (2007) investigated the effects of pH on short-term uptake of manganese and cadmium into Chlamydomonas reinhardtii, and they concluded that the increase in proton concentration inhibits the metal internalization ... cupric ion, and Min+ is the competing cation that inhibits copper toxicity and accumulation In this study, calcium ion and proton were assumed to be the only competing cations WHAM VI (The Windermere ... transferred into the medium and then cultured All incubations including toxicity test were performed at 25.0 ± 1.0ºC under continuous light and aseptic condition Toxicity test The toxicity tests...

Ngày tải lên: 05/09/2013, 10:15

... The following gives an overview over the motifs mapped in different nuclear proteins, including transcription factors, DNA- and RNA-binding proteins, viral proteins, kinases, and kinase adapters ... transactivation domain, and a C-terminal steroid-binding domain While in these early studies the domain required for nuclear matrix attachment was localized to the C-terminal steroid binding domain in hAR, ... movement is determined by Ran, a small GTP-binding protein (reviewed in refs 22, 48 and 50) NPC structure includes soluble proteins, termed nucleoporins (nups) and integral membrane proteins, termed...

Ngày tải lên: 08/04/2014, 12:52

... electroplating, smelting, and ore processing (ATSDR 1994) Mine tailings and drainage from mines can contain high concentrations of zinc (Cobb et al 2000) The fate and transport of zinc (Zn+2) in the ... between heavy metal concentrations in the soil and heavy metal concentrations in vegetables and 2) determine the level of risk associated with exposure to heavy metals through ingestion of contaminated ... in soil Sources may include mining and smelting of ores, electroplating operations, fungicides and pesticides, sewage and sludge from treatment plants, and the burning of fossil fuels (John and...

Ngày tải lên: 15/03/2014, 23:10

... (¼NH)-containing Heavy Metal Bindings and Their Interactions with Thiol Peptides amino acid that plays a central role in binding to and transport of Ni, especially in Ni-hyper-accumulating plants ... wall bindings 3.2 Distribution of Heavy Metals and Conjugating Ligands in Root Besides bioavailability, uptake and translocation efficiencies determine metal accumulation and distribution in plants ... understanding on the possible roles of PCs and non-PC ligands contained in them 4 M Inouhe et al Biological Ligands for Heavy Metal Conjugation and Detoxification in Plant Cells 2.1 Phytochelatins...

Ngày tải lên: 29/05/2014, 17:23

... metallic ions in water, as the quantity of absorbent (PTW) increases, the active sites of the absorbent increases, which results in more metallic ions absorbed and less ions remain in water in ... oxide and potassium oxide It is fabricated by mixing titanium oxides and potassium oxides in a certain ratio, with a suitable calcination flux, and calcining at 900 – 1100°C The reaction during ... showed in Fig It can be seen that the absorption of Pb2+ and Cd2+ on PTW increases with time The absorption capacity of PTW increases quickly in the beginning and slows down gradually, and reaches...

Ngày tải lên: 05/09/2013, 09:38

... (%) In further study, heavy metal leaching into rain water with lower pH value and longer soaking time should be investigated; the use of mixing treated sludge with raw material/powder for making ... based on heavy metals leaching after 2, 14 and 21 days of soaking in rain water The experiments were carried out in the laboratory of Environmental analysis, faculty of Environmental Sciences and ... adequately in term of environmental and technical aspects The results were based on the concentration of some heavy metals existing in sludge in the rain water soaked with bricks and on some...

Ngày tải lên: 12/02/2014, 17:20

... correcting the English References Berti R, Cunningham S C and Cooper E M 1998 Case studies in the field -in- place inactivation and phytorestoration of Pbcontaminated sites In Metal- Contaminated ... test plants The effect was more pronounced in treatments where high EDTA amounts were added in single application No mycorrhizal infection was found in plants growing in soil treated with and ... texture was sandy loam After being air-dried, the soil was passed through a 4-mM sieve The in uence of EDTA (Fluka, Steinheim) on Pb, Zn and Cd plant uptake, leaching, and toxicity was tested in soil...

Ngày tải lên: 16/03/2014, 00:07

... fraction whereas Cu is mainly in the strongly bound organic and residual phases Hewitt and Candy (1990), examined levels of Pb, Cd and Zn in soil and dust samples collected in and around the city ... water supplies HEAVY METAL CONTAMINATION IN SOILS OF URBAN HIGHWAYS 313 Conclusions Heavy metal contamination in soils taken from along I-75, Cincinnati, Ohio, is very high in the top 15 cm ... of swelling clay in the soil, in this particular case, clay mineralogy is not important in the binding of the heavy metals, whereas the positive correlation of metals with organic carbon indicates...

Ngày tải lên: 16/03/2014, 00:25

... cities and minerals exploiting area The main reason leading to heavy metals pollution is pouring into water environment a large amount of industrial and untreated wastewater Pollution by heavy metals ... seen in rivers near industrial area, big cities and minerals exploiting area The main reason leading to heavy metals pollution is pouring into water environment a large amount of industrial and ... have been reported of humans suffering zinc intoxication by the ingestion of zinc coins Pennies and other small coins are sometimes ingested by dogs, resulting in the need for medical treatment...

Ngày tải lên: 09/01/2015, 08:53

... Netherlands Tiitem E and Apak R (1995) The role of metal- ligand complexation equilibria in the retention and mobilization of heavy metals in soil In Contaminated Soil '95 Proceedings of the Fifth International ... of waste water and effluents with solid industrial wastes for the adsorptive removal of heavy metal contaminants In Sorption of heavy metal cations Flocculation in Biotechnology and Separation ... hydrous oxide gel containing the heavy metal hydroxide as the elution proceeds, and this layer may promote further binding of the metals enhancing sorption Generally very high limiting capacities have...

Ngày tải lên: 23/09/2012, 14:47

... was examined by MAR-FISH, and the results are shown in Figs and Lower initial pH conditions increased anaerobic acetate uptake by Candidatus ‘Accumulibacter phosphatis’ in the second and third ... determine the effect of pH on anaerobic acetate uptake by Candidatus ‘Accumulibacter phosphatis’ and Candidatus ‘Competibacter phosphatis’ Within the tested pH range (initial pH from to and final ... and GAOs The profiles of pH, acetate uptake, and phosphate release observed in the cold experiments are shown in Figs 2, and In all cases, acetate uptake and the release of phosphate were observed...

Ngày tải lên: 05/09/2013, 09:38

... concentration in the filtrate during the anaerobic phase and the aerobic phase in Run1-1 to Run1-4 are shown in Fig In the anaerobic phase, PO4-P concentration increased to a certain value and remained ... phosphorus uptake and release was discussed by comparing these indices Fig shows the average and standard deviation of vrel, Cmax and kupt which values were calculated from 7, 9, and data in Run1-1, ... Water and Environment Technology, Vol 8, No.4, 2010 Phosphorus removal in SBR1 The PO4-P concentration in the effluent of SBR1 in Run1-1 to Run1-4 is shown in Fig In Run1-1, the mean and standard...

Ngày tải lên: 05/09/2013, 10:15

... receiver domain and a long C-terminal part containing a single-repeat MYB-type DNAbinding domain (Sakai et al 1998) called a GARP domain (Riechmann et al 2000) and the proline- and glutamine-rich ... harpin-induced 1) was increased in tobacco leaves On the other hand, spermine induces mitochondrial dysfunction and activation of SA-induced protein kinase (SIPK) and wound-induced protein kinase ... Furthermore, minimal binding domain of BRI1 was determined using binding assays and recombinant BRI1 fragments (Kinoshita et al 2005) In other plant species, it was also shown that mutations in BRI1...

Ngày tải lên: 14/02/2014, 12:20

... concentrations in Lowermoor treatment works and in trunk main system Indications of copper concentrations in the contaminated water Other water pollution incidents involving aluminium sulphate Key points ... to have complained later of continuing or new symptoms following the incident These symptoms have included joint and muscle pains, memory loss, hypersensitivity and gastrointestinal disorders ... General information The absorption, distribution and excretion of iron in humans The toxicity of iron Recommended upper level intakes Metal- metal interactions Introduction Interactions with aluminium...

Ngày tải lên: 17/02/2014, 10:20

... modelling the uptake of organic compounds into plants any easier However, combining models and experiments gain a lot of insight into the topic, and models can be used to help design and interpret ... measured and applied in numerous studies It is well suited for determining distribution constants between environmental media and water, and for the determination of protein-binding affinities (Heringa ... the topic of uptake of organic contaminants from soil by plants The goal was to gain insight into both experimental data and predictive methods Knowledge of uptake of contaminants in plants is relevant...

Ngày tải lên: 05/03/2014, 20:20

... Denny (1980 and 1987) further noted that main route of heavy metal uptake in wetland plants was through the roots in the case of emergent and surface-floating plants, while euhydrophytes (plants that ... materials in soil In: B.J Alloway (Ed.) Heavy metals in soils Blackie, Glasgow Alloway, B J (1992) Heavy metal dynamics in sediments and estuarine water In: R M Haison(Ed) Understanding Our Environment ... to sink In this way heavy metals are removed from wastewater and trapped in the wetland sediments, thus protecting the ultimate receiving aquatic environment ADSORPTION In sediments heavy metals...

Ngày tải lên: 15/03/2014, 23:06

... adsorption The main parameters in uencing heavy metal adsorption are soil pH, type and speciation of metal ion involved, heavy metal competition, soil composition and aging The individual behavior of ... important interfaces involved in heavy metal adsorption in soils are predominantly inorganic colloids such as clays, metal oxides and hydroxides, but also organic colloidal matter provides interfaces ... (e.g., iron and aluminium oxides) and adsorption increases with pH The adsorbed metal ions show only poor desorbability, and metal adsorption is independent from inert electrolytes Heavy metals are...

Ngày tải lên: 15/03/2014, 23:09

... GAL4 DNA-binding domain with CfEcR ligand-binding domain cloned under the control of the 35S promoter in the pKYLX80 vector A fusion of VP16 activation domain and LmRXR ligand-binding domain cloned ... activity in the absence of ligand and lower induced luciferase activity in the presence of ligand The transgenic plants containing the CfEcR:LmRXR switch showed a similar meth- Time course studies in ... Interestingly, an increase in the ligandinduced activity of this switch containing the improved Kozak sequence was not accompanied by an increase in background activity in the absence of ligand Therefore,...

Ngày tải lên: 15/03/2014, 23:20

Ngày tải lên: 16/03/2014, 00:07

... only maintain Ca2+ in an absorbable form but also interact with the plasma membranes of certain cells, facilitating Ca2+ uptake 5006 Concerning the conflicting results of human studies, some in favor ... Ca2–CPP aggregates in the correct conformation and concentration, and a suitable ratio between Ca2+ and CPP, this latter condition being in agreement with data determined in intestinal model studies ... than 10 min, including a 1–2 interval between the addition of Ca2+ and that of CPP In this period of time, cells maintained full viability As a control, [Ca2+]i concentrations after ionomycin treatment...

Ngày tải lên: 16/03/2014, 05:20