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https://www.readbyqxmd.com/read/29227891/changes-in-metal-mobility-assessed-by-edta-kinetic-extraction-in-three-polluted-soils-after-repeated-phytoremediation-using-a-cadmium-zinc-hyperaccumulator
#1
Zhu Li, Longhua Wu, Yongming Luo, Peter Christie
Phytoextraction is one of the most promising technologies for the decontamination of metal-polluted agricultural soils. Effects of repeated phytoextraction by the cadmium (Cd)/zinc (Zn) hyperaccumulator Sedum plumbizincicola on metal (Cd, Zn, copper (Cu) and lead (Pb)) mobility were investigated in three contaminated soils with contrasting properties. EDTA kinetic extraction and the two first-order reactions model showed advantages in the assessment of soil metal mobility and clearly discriminated changes in metal fractions induced by phytoextraction...
December 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/29205850/ots1-dependent-desumoylation-increases-tolerance-to-high-copper-levels-in-arabidopsis
#2
Erbao Zhan, Huapeng Zhou, Sha Li, Lei Liu, Tinghong Tan, Honghui Lin
The conjugation of SUMO (small ubiquitin-like modifier) to protein substrates is a reversible process (SUMOylation/deSUMOylation) that regulates plant development and stress responses. The essential metal copper (Cu) is required for normal plant growth, but excess amounts are toxic. The SUMO E3 ligase SIZ1 and SIZ1-mediated SUMOylation function in plant tolerance to excess Cu. It is unknown whether deSUMOylation also contributes to Cu tolerance in plants. Here we report that OTS1, a protease that cleaves SUMO from its substrate proteins, participates in Cu tolerance in Arabidopsis thaliana (Arabidopsis)...
December 4, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29196788/quantification-of-the-catalytic-performance-of-c1-cellulose-specific-lytic-polysaccharide-monooxygenases
#3
Matthias Frommhagen, Adrie H Westphal, Roelant Hilgers, Martijn J Koetsier, Sandra W A Hinz, Jaap Visser, Harry Gruppen, Willem J H van Berkel, Mirjam A Kabel
Lytic polysaccharide monooxygenases (LPMOs) have recently been shown to significantly enhance the degradation of recalcitrant polysaccharides and are of interest for the production of biochemicals and bioethanol from plant biomass. The copper-containing LPMOs utilize electrons, provided by reducing agents, to oxidatively cleave polysaccharides. Here, we report the development of a β-glucosidase-assisted method to quantify the release of C1-oxidized gluco-oligosaccharides from cellulose by two C1-oxidizing LPMOs from Myceliophthora thermophila C1...
December 2, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29192501/all-organic-label-like-copper-ii-ions-fluorescent-film-sensors-with-high-sensitivity-and-stretchability
#4
Mengjer Wu, Hsiu-Hao Hu, Chen-Zih Siao, Yu-Ming Liao, Jyun-Han Chen, Ming-Yang Li, Tai-Yuan Lin, Yang-Fang Chen
Deep learning and analysis of heavy metal concentration are very crucial to our life, for it plays an essential role in both environmental and human health. In this paper, we developed a new Cu (II) ions sensor made by all organic material with bending and stretching properties. The new sensor consists of chlorophyll-a extracted from fresh leaves of Common Garcinia, plant fiber and with the use of PDMS as a substrate. Fluorescence spectra study shows that chlorophyll-a is significantly much more sensitive to Cu (II) ions than any other heavy metal ions and the device sensitivity outperforms all the Cu (II) ions sensors ever reported...
December 1, 2017: ACS Sensors
https://www.readbyqxmd.com/read/29189890/decoding-the-role-of-hypothetical-protein-all3255-of-anabaena-pcc7120-in-heavy-metal-stress-management-in-escherichia-coli
#5
Prashant Kumar Singh, Mengmeng Tang, Sudhir Kumar, Alok Kumar Shrivastava
Cadmium is a non-essential toxic heavy metal for organisms, including plants and cyanobacteria. Cadmium resistance transporters involved in resistance of cells against various toxicants such as drugs and effluxes cytotoxic compounds from cells. However, cadmium resistance-associated protein (CadD) has never been reported from a diazotrophic cyanobacterium Anabaena sp. To test whether the hypothetical protein All3255 of Anabaena sp. PCC7120 a homolog of cadmium resistance-associated protein (CadD) involved in cadmium or heavy metal resistance or not, cloning and heterologous expression analysis of all3255 performed in Escherichia coli BL21 (DE3)...
November 30, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/29185217/correction-to-heavy-metal-and-nutrient-uptake-in-plants-colonizing-post-flotation-copper-tailings
#6
Dorota Kasowska, Krzysztof Gediga, Zofia Spiak
The correct presentation of Table 4 is shown in this paper.
November 28, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29183602/copper-complexes-of-the-1-3-4-thiadiazole-derivatives-modulate-antioxidant-defense-responses-and-resistance-in-tomato-plants-against-fungal-and-bacterial-diseases
#7
Amal Smaili, Lalla Aicha Rifai, Siham Esserti, Tayeb Koussa, Fouad Bentiss, Salaheddine Guesmi, Abdelhakim Laachir, Mohamed Faize
The metallic complexes μ-chloro-μ-[2,5-bis (2-pyridyl)-1,3,4-thiadiazole] aqua chlorocopper (II) dichlorocopper (II) (abbreviated 2PTH-Cu2-Cl4); aquabis [2,5-bis (2-pyridyl)-1,3,4-thiadiazole-κ2N2,N3] (trifluoromethane-sulfonato-κO) copper(II) trifluoro metrhanesulfonate (2PTH-Cu-tF) and bis[(2,5-bis(pyridine-2-yl)-1,3,4-thiadiazole-di-azido copper(II)] (2PTH-Cu-Az) were compared for their antimicrobial activities in vitro, and their aptitude to control Verticillium wilt and crown gall diseases development of tomato in the greenhouse...
November 2017: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/29182292/an-ultra-sensitive-ethene-detector-based-on-a-graphene-copper-i-hybrid-material
#8
Wangyang Fu, Thomas F van Dijkman, Lia Macedo Coelho Lima, Feng Jiang, Grégory F Schneider, Elisabeth Bouwman
Ethene is a highly diffusive and relatively unreactive gas that induces ageing responses in plants in concentrations as low as parts per billion. Monitoring concentrations of ethene is critically important for transport and storage of food crops, necessitating the development of a new generation of ultra-sensitive detectors. Here we show that by functionalizing graphene with copper complexes biologically relevant concentrations of ethene and of the spoilage marker ethanol can be detected. Importantly, in addition these sensors provide us with important insights into the interactions between molecules, a key concept in chemistry...
November 28, 2017: Nano Letters
https://www.readbyqxmd.com/read/29179146/copper-interactions-on-arsenic-bioavailability-and-phytotoxicity-in-soil
#9
Mohammed Kader, Dane T Lamb, Liang Wang, Mallavarapu Megharaj, Ravi Naidu
Arsenic (As) and copper (Cu) are co-contaminants in the environment but little is known about their ecological impact as mixtures in soil. In this study, we investigated the combined As-Cu interactions on toxicity and uptake as binary mixtures in 5 contrasting soils. The study included solubility, contaminant uptake and toxicity in cucumber (Cucumis sativus L.) as a model plant species. Soils were spiked individually and as a mixtures at 10 different As levels (2, 4, 8 up to 1024mgkg-1). Copper was added with As at two effective concentration levels (EC10Cu and EC50Cu)...
November 24, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29178942/antioxidant-effect-of-aqueous-extract-of-four-plants-with-therapeutic-potential-on-gynecological-diseases-semen-persicae-leonurus-cardiaca-hedyotis-diffusa-and-curcuma-zedoaria
#10
Shaojian Ji, Amir Fattahi, Nathalie Raffel, Inge Hoffmann, Matthias W Beckmann, Ralf Dittrich, Michael Schrauder
BACKGROUND: Little information is available concerning antioxidant effects of plant teas (water boiled) which are used more commonly in traditional Chinese medicine than other extracts. Thus, we addressed this issue by evaluating the ability of teas from four different plants with therapeutic potential on gynecological diseases. METHODS: The aqueous extracts of Semen persicae, Leonurus cardiaca, Hedyotis diffusa, and Curcuma zedoaria rhizome were prepared and then their effects on copper-induced low-density lipoprotein cholesterol (LDL-C) oxidation were evaluated by spectrophotometric method...
November 25, 2017: European Journal of Medical Research
https://www.readbyqxmd.com/read/29177784/how-tapeworm-infection-and-consumption-of-a-cd-and-zn-hyperaccumulating-plant-may-affect-cu-fe-and-mn-concentrations-in-an-animal-a-plant-consumer-and-tapeworm-host
#11
Ivana Jankovská, Vladislav Sloup, Jiřina Száková, Jan Magdálek, Stanislava Nechybová, Pavla Peřinková, Iva Langrová
This study evaluated the effects of a hyperaccumulator plant (Arabidopsis halleri), containing surplus of cadmium (Cd) and zinc (Zn) and being an admixture to the rat feed, on concentrations of copper (Cu), iron (Fe), and manganese (Mn) in the tissues of experimental rats infected/uninfected with the tapeworm (Hymenolepis diminuta). Male Wistar rats were divided into three groups (00, P0, and PT); the P0 and PT animals were fed a standard mixture for rats (ST-1) supplemented with the plant A. halleri at a weekly Zn and Cd dosage of 123 and 1 mg, respectively...
November 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29175636/effects-of-rhizophagus-clarus-and-p-availability-in-the-tolerance-and-physiological-response-of-mucuna-cinereum-to-copper
#12
Paulo Ademar Avelar Ferreira, Tales Tiecher, Tadeu Luis Tiecher, Wesley de Melo Rangel, Claudio Roberto Fonsêca Sousa Soares, Sidnei Deuner, Camila Peligrinotti Tarouco, Admir José Giachini, Fernando Teixeira Nicoloso, Gustavo Brunetto, Mariana Vieira Coronas, Carlos Alberto Ceretta
Arbuscular mycorrhizal fungi (AMF) improve plant ability to uptake P and tolerate heavy metals. This study aimed to evaluate the effect of available P and the inoculation of Rhizophagus clarus in a Cu-contaminated soil (i) on the activity of acid phosphatases (soil and plant), the presence of glomalin, and (ii) in the biochemical and physiological status of Mucuna cinereum. A Typic Hapludalf soil artificially contaminated by adding 60 mg kg-1 Cu was used in a 3 × 2 factorial design with three replicates...
November 21, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29172132/melatonin-pretreatment-improves-vanadium-stress-tolerance-of-watermelon-seedlings-by-reducing-vanadium-concentration-in-the-leaves-and-regulating-melatonin-biosynthesis-and-antioxidant-related-gene-expression
#13
Muhammad Azher Nawaz, Yanyan Jiao, Chen Chen, Fareeha Shireen, Zuhua Zheng, Muhammad Imtiaz, Zhilong Bie, Yuan Huang
Vanadium (V) is an important heavy metal with ubiquitous presence in the Earth's crust, but limited information is available as to its effect on plants and management strategies. Melatonin is a widely studied biomolecule; it acts as an antioxidant and a signaling molecule that enhances the abiotic stress tolerance of plants. Melatonin improves copper, zinc, and cadmium tolerance in plants. In this study, we investigated the response of watermelon seedlings to V stress and the potential role of melatonin in enhancing V stress tolerance of watermelon seedlings...
November 20, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29172102/influence-of-salicylic-acid-pretreatment-on-seeds-germination-and-some-defence-mechanisms-of-zea-mays-plants-under-copper-stress
#14
Šárka Moravcová, Jiří Tůma, Zuzana Kovalíková Dučaiová, Piotr Waligórski, Monika Kula, Diana Saja, Aneta Słomka, Wojciech Bąba, Marta Libik-Konieczny
The study was focused on the influence of salicylic acid (SA) on maize seeds germination and on some physiological and biochemical processes in maize plants growing in the hydroponic culture under copper (Cu) stress. A significant influence of SA pretreatment on the advanced induction of the maize seeds metabolic activity and the level of the endogenous SA in germinated seeds and developing roots have been stated. Although, the ability of maize seeds to uptake SA and accumulate it in the germinated roots was confirmed, the growth inhibition of Cu-stressed maize seedlings was not ameliorated by SA seeds pretreatment...
November 14, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29169126/effect-of-copper-on-the-translocation-and-transformation-of-polychlorinated-biphenyls-in-rice
#15
Lili Pan, Jianteng Sun, X Chris Le, Lizhong Zhu
Contamination of organic pollutants in the environment is usually accompanied by heavy metals. However, a little information on the influences of heavy metals on the uptake, translocation and transformation of organic pollutants in plants is available. In this study, ten-day hydroponic exposure was conducted to explore the influence of copper (Cu) on the bioaccumulation and biotransformation of polychlorinated biphenyls (PCBs) in intact young rice (Oryza sativa L.). Low dose of Cu (≤100 μmol/L) increased the accumulation of CB-61 in rice plants, while excess concentrations of Cu (>100 μmol/L) inhibited uptake and translocation of CB-61...
November 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/29160685/graphene-oxide-a-new-carrier-for-slow-release-of-plant-micronutrients
#16
Shervin Kabiri, Fien Degryse, Diana N H Tran, Rodrigo da Silva, Michael J McLaughlin, Dusan Losic
The environmental problems and low efficiency associated with conventional fertilizers provides an impetus to develop advanced fertilizers with slower release and better performances. Here we report of development of a new carrier platform based on graphene oxide (GO) sheets that can provide a high loading of plant micronutrients with controllable slow release. To prove this concept two micronutrients zinc (Zn) and copper (Cu) were used to load on GO sheets and hence formulate GO-based micronutrients fertilizer...
November 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29157887/spatial-patterns-of-heavy-metal-accumulation-in-sediments-and-macrophytes-of-bellandur-wetland-bangalore
#17
T V Ramachandra, P B Sudarshan, M K Mahesh, S Vinay
Heavy metals are one among the toxic chemicals and accumulation in sediments and plants has been posing serious health impacts. Wetlands aid as kidneys of the landscape and help in remediation through uptake of nutrients, heavy metals and other contaminants. The analyses of macrophytes and sediment samples help in evaluating pollution status in aquatic environment. In this study concentration of six heavy metals (Cadmium (Cd), Chromium (Cr), Copper (Cu), Nickel (Ni), Lead (Pb) and Zinc (Zn)) were assessed in sediment and dominant macrophyte samples collected from Bellandur Lake, largest Lake of Bangalore, India...
November 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29157472/nuclear-magnetic-resonance-characterization-of-traditional-homeopathically-manufactured-copper-cuprum-metallicum-and-plant-gelsemium-sempervirens-medicines-and-controls
#18
Michel Van Wassenhoven, Martine Goyens, Marc Henry, Etienne Capieaux, Philippe Devos
BACKGROUND: NMR proton relaxation is sensitive to the dynamics of the water molecule H2O, through the interaction of the spin of the proton ((1)H) with external magnetic and electromagnetic fields. METHODS: We measured dilution and potentization processes through measurements of (1)H spin-lattice T1 and spin-spin T2 relaxation times. In order to interpret the recorded fluctuations in T1- or T2-values, experimental data were linearized by investigating how the area under a fluctuating time = f(dilution) curve (dilution integral or DI) changes with dilution...
November 2017: Homeopathy: the Journal of the Faculty of Homeopathy
https://www.readbyqxmd.com/read/29155390/biosynthesised-silver-and-copper-nanoformulation-as-foliar-spray-to-control-bird-s-eye-spot-disease-in-tea-plantations
#19
Balasubramanian Mythili Gnanamangai, Ponnusamy Ponmurugan, Sengottaiyan Eashwari Jeeva, Kolandasamy Manjukarunambika, Vishwanathan Elango, Kolandaivel Hemalatha, Jyoti Prasad Kakati, Rajamanickam Mohanraj, Somasundaram Prathap
Tea leaves have economic importance in preparation of the popular beverage of the world "tea". Bird's eye spot disease of tea leaves creates significant revenue loss in tea trade of many tea plant cultivating countries. Management of this disease by silver (AgNps) and copper (CuNps) nanoparticles that are biosynthesised by efficient antagonists was studied. The biocontrol agents like Pseudomonas fluorescens, Trichoderma atroviride and Streptomyces sannanensis were evaluated for nanoparticle synthesis against Cercospora theae isolates namely KC10, MC24 and VC38...
December 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/29154134/validation-of-a-biotic-ligand-model-on-site-specific-copper-toxicity-to-daphnia-magna-in-the-yeongsan-river-korea
#20
Jinhee Park, Jin-Sung Ra, Hojung Rho, Jaeweon Cho, Sang Don Kim
The objective of this study was to determine whether the water effect ratio (WER) or biotic ligand model (BLM) could be applied to efficiently develop water quality criteria (WQC) in Korea. Samples were collected from 12 specific sites along the Yeongsan River (YSR), Korea, including two sewage treatment plants and one estuary lake. A copper toxicity test using Daphnia magna was performed to determine the WER and to compare to the BLM prediction. The results of the WER from YSR samples also indicated significantly different copper toxicities in all sites...
November 16, 2017: Ecotoxicology and Environmental Safety
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