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https://www.readbyqxmd.com/read/28523618/the-effect-of-sewage-sludge-on-heavy-metal-concentrations-in-wheat-plant-triticum-aestivum-l
#1
Fatemeh Shahbazi, Somayeh Ghasemi, Hamid Sodaiezadeh, Kobra Ayaseh, Rasool Zamani-Ahmadmahmoodi
The use of sewage sludge in agricultural soils can improve soil physical and chemical properties and soil fertility by increasing organic materials; however, the presence of heavy metals in sewage sludge is a significant problem for the quality of agricultural products and the environment. Most heavy metals, due to their inactive nature, are stable and can affect human health. This study investigates the effect of sewage sludge on the concentration of copper, zinc, cadmium, lead, iron, and manganese in two varieties of wheat, i...
May 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28523616/the-effect-of-multiple-contamination-of-soil-on-lmw-and-mmw-pahs-accumulation-in-the-roots-of-rubus-fruticosus-l-naturally-growing-near-the-copper-mining-and-smelting-complex-bor-east-serbia
#2
Slađana Č Alagić, Vesna P Stankov Jovanović, Violeta D Mitić, Jelena S Nikolić, Goran M Petrović, Snežana B Tošić, Gordana S Stojanović
Samples of roots and spatial soils of native Rubus fruticosus L. were collected from the spots positioned at different distances from the copper smelter and city heating plants in the industrial zone of the town of Bor (Serbia) and subjected to chemical analyses in order to determine the content of several heavy metals, and 15 priority polycyclic aromatic hydrocarbons (PAHs). In this study, the results for 9 low and medium molecular weight PAHs (LMW and MMW PAHs) are represented and processed using the calculation of bio-concentration factors and statistical methods such as hierarchical cluster analysis and Pearson's correlation study with the aim of investigating the plant capabilities for their uptake from the soil and later accumulation into the root tissue, under the hostile circumstances of multiple contamination...
May 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28522117/characterization-of-cu-ii-reconstituted-acc-oxidase-using-experimental-and-theoretical-approaches
#3
Nadia El Bakkali-Tahéri, Sybille Tachon, Maylis Orio, Sylvain Bertaina, Marlène Martinho, Viviane Robert, Marius Réglier, Thierry Tron, Pierre Dorlet, A Jalila Simaan
1-Aminocyclopropane-1-carboxylic acid oxidase (ACCO) is a non heme iron(II) containing enzyme that catalyzes the final step of the ethylene biosynthesis in plants. The iron(II) ion is bound in a facial triad composed of two histidines and one aspartate (H177, D179 and H234). Several active site variants were generated to provide alternate binding motifs and the enzymes were reconstituted with copper(II). Continuous wave (cw) and pulsed Electron Paramagnetic Resonance (EPR) spectroscopies as well as Density Functional Theory (DFT) calculations were performed and models for the copper(II) binding sites were deduced...
May 15, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28507557/exogenous-glutathione-enhances-mercury-tolerance-by-inhibiting-mercury-entry-into-plant-cells
#4
Yeon-Ok Kim, Hyeun-Jong Bae, Eunjin Cho, Hunseung Kang
Despite the increasing understanding of the crucial roles of glutathione (GSH) in cellular defense against heavy metal stress as well as oxidative stress, little is known about the functional role of exogenous GSH in mercury (Hg) tolerance in plants. Here, we provide compelling evidence that GSH contributes to Hg tolerance in diverse plants. Exogenous GSH did not mitigate the toxicity of cadmium (Cd), copper (Cu), or zinc (Zn), whereas application of exogenous GSH significantly promoted Hg tolerance during seed germination and seedling growth of Arabidopsis thaliana, tobacco, and pepper...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28506182/elemental-properties-of-copper-slag-and-measured-airborne-exposures-at-a-copper-slag-processing-facility
#5
Christopher Mugford, Jenna L Gibbs, Randy Boylstein
In 1974, the National Institute for Occupational Safety and Health recommended a ban on the use of abrasives containing >1% silica, giving rise to abrasive substitutes like copper slag. We present results from a National Institute for Occupational Safety and Health industrial hygiene survey at a copper slag processing facility that consisted of the collection of bulk samples for metals and silica; and full-shift area and personal air samples for dust, metals, and respirable silica. Carcinogens, suspect carcinogens, and other toxic elements were detected in all bulk samples, and area and personal air samples...
May 16, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28501691/biosynthesis-and-characterization-of-copper-oxide-nanoparticles-and-its-anticancer-activity-on-human-colon-cancer-cell-lines-hct-116
#6
V Gnanavel, V Palanichamy, Selvaraj Mohana Roopan
The eco-friendly synthesis of nanoparticles through green route from plant extracts have renowned a wide range of application in the field of modern science, due to increased drug efficacy and less toxicity in the nanosized mediated drug delivery model. In the present study, our research groups have biosynthesized the stable and cost effective copper oxide nanoparticles (CuO NPs) from the leaves of (Ormocarpum cochinchinense) O. cochinchinense. The synthesis of crystalline CuO NPs from the leaf extract of O...
May 2, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28494313/heavy-metals-translocation-and-accumulation-from-the-rhizosphere-soils-to-the-edible-parts-of-the-medicinal-plant-fengdan-paeonia-ostii-grown-on-a-metal-mining-area-china
#7
Zhang Jun Shen, De Cong Xu, Yan Song Chen, Zhen Zhang
Fengdan (Paeonia ostii) is one of Chinese 34 famous medicinal materials. This study investigated the concentrations of Arsenic (As), Chromium (Cr), Cadmium (Cd), Copper (Cu), Lead (Pb), Iron (Fe), Manganese (Mn), and Zinc (Zn) in rhizosphere soils, cortex mouton and seeds of Fengdan planted in a metal mining area, China. The mean concentrations of As, Cd, Cu, and Zn in the rhizosphere soils were above the limits set by the Chinese Soil Environmental Quality Standard (GB 15618-1995). The contamination factor (CF) of Cd was >5, while it was >2for As, Cu, Pb, and Zn in all the soils...
May 8, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28493687/comparative-metabolic-response-between-cucumber-cucumis-sativus-and-corn-zea-mays-to-a-cu-oh-2-nanopesticide
#8
Lijuan Zhao, Yuxiong Huang, Arturo A Keller
Due to their unique properties, copper-based nanopesticides are emerging in the market. Thus, understanding their effect on crop plants is very important. Metabolomics can capture a snapshot of cellular metabolic responses to a stressor. We selected maize and cucumber as model plants for exposure to different doses of Cu(OH)2 nanopesticide. GC-TOF-MS-based metabolomics was employed to determine the metabolic responses of these two species. Results revealed significant differences in metabolite profile changes between maize and cucumber...
May 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28487760/isoxazole-derivatives-as-new-nitric-oxide-elicitors-in-plants
#9
Anca Oancea, Emilian Georgescu, Florentina Georgescu, Alina Nicolescu, Elena Iulia Oprita, Catalina Tudora, Lucian Vladulescu, Marius-Constantin Vladulescu, Florin Oancea, Calin Deleanu
Several 3,5-disubstituted isoxazoles were obtained in good yields by regiospecific 1,3-dipolar cycloaddition reactions between aromatic nitrile oxides, generated in situ from the corresponding hydroxyimidoyl chlorides, with non-symmetrical activated alkynes in the presence of catalytic amounts of copper(I) iodide. Effects of 3,5-disubstituted isoxazoles on nitric oxide and reactive oxygen species generation in Arabidopsis tissues was studied using specific diaminofluoresceine dyes as fluorescence indicators...
2017: Beilstein Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28486968/complete-sequence-and-comparative-genomic-analysis-of-eight-native-pseudomonas-syringae-plasmids-belonging-to-the-ppt23a-family
#10
José A Gutiérrez-Barranquero, Francisco M Cazorla, Antonio de Vicente, George W Sundin
BACKGROUND: The pPT23A family of plasmids appears to be indigenous to the plant pathogen Pseudomonas syringae and these plasmids are widely distributed and widely transferred among pathovars of P. syringae and related species. pPT23A-family plasmids (PFPs) are sources of accessory genes for their hosts that can include genes important for virulence and epiphytic colonization of plant leaf surfaces. The occurrence of repeated sequences including duplicated insertion sequences on PFPs has made obtaining closed plasmid genome sequences difficult...
May 10, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28480907/metabolomic-analysis-of-the-effects-of-cadmium-and-copper-treatment-in-oryza-sativa-l-using-untargeted-liquid-chromatography-coupled-to-high-resolution-mass-spectrometry-and-all-ion-fragmentation
#11
Meritxell Navarro-Reig, Joaquim Jaumot, Benjamín Piña, Encarnación Moyano, Maria Teresa Galceran, Romà Tauler
While the knowledge of plant metabolomes has increased in the last few years, their response to the presence of toxicants is still poorly understood. Here, we analyse the metabolomic changes in Japanese rice (Oryza sativa var. Japonica) upon exposure to heavy metals (Cd(ii) and Cu(ii)) in concentrations from 10 to 1000 μM. After harvesting, rice metabolites were extracted from aerial parts of the plants and analysed by HPLC (HILIC TSK gel amide-80 column) coupled to a mass spectrometer quadrupole-Orbitrap (Q-Exactive)...
May 8, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28480491/double-genetically-modified-symbiotic-system-for-improved-cu-phytostabilization-in-legume-roots
#12
Patricia Pérez-Palacios, Asunción Romero-Aguilar, Julián Delgadillo, Bouchra Doukkali, Miguel A Caviedes, Ignacio D Rodríguez-Llorente, Eloísa Pajuelo
Excess copper (Cu) in soils has deleterious effects on plant growth and can pose a risk to human health. In the last decade, legume-rhizobium symbioses became attractive biotechnological tools for metal phytostabilization. For this technique being useful, metal-tolerant symbionts are required, which can be generated through genetic manipulation.In this work, a double symbiotic system was engineered for Cu phytostabilization: On the one hand, composite Medicago truncatula plants expressing the metallothionein gene mt4a from Arabidopsis thaliana in roots were obtained to improve plant Cu tolerance...
May 8, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28476982/effects-of-bimetallic-nanoparticles-on-seed-germination-frequency-and-biochemical-characterisation-of-eruca-sativa
#13
Mehreen Zaka, Bilal Haider Abbasi
In the modern era of science and technology, nanotechnology is becoming popular science field because materials at nanoscale contain improved physical, chemical and biological properties. This study aimed to explore the capacity of bimetallic nanoparticle alloys of silver (Ag), copper (Cu), gold (Au) in different ratios to evaluate the effects on medicinally important plant Eruca sativa. Biochemical parameters of Eruca sativa were studied by applying bimetallic alloy nanoparticles. Seeds of Eruca sativa were germinated on Murashige and Skoog medium with various combinations of nanoparticles suspension employed in concentration of (30 µg/ml)...
April 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28471462/the-role-of-metals-in-mammalian-olfaction-of-low-molecular-weight-organosulfur-compounds
#14
REVIEW
Eric Block, Victor S Batista, Hiroaki Matsunami, Hanyi Zhuang, Lucky Ahmed
Covering: up to the end of 2017While suggestions concerning the possible role of metals in olfaction and taste date back 50 years, only recently has it been possible to confirm these proposals with experiments involving individual olfactory receptors (ORs). A detailed discussion of recent experimental results demonstrating the key role of metals in enhancing the response of human and other vertebrate ORs to specific odorants is presented against the backdrop of our knowledge of how the sense of smell functions both at the molecular and whole animal levels...
May 10, 2017: Natural Product Reports
https://www.readbyqxmd.com/read/28468120/trace-element-concentrations-along-a-gradient-of-urban-pressure-in-forest-and-lawn-soils-of-the-paris-region-france
#15
Ludovic Foti, Florence Dubs, Jacques Gignoux, Jean-Christophe Lata, Thomas Z Lerch, Jérôme Mathieu, François Nold, Naoise Nunan, Xavier Raynaud, Luc Abbadie, Sébastien Barot
The concentration, degree of contamination and pollution of 7 trace elements (TEs) along an urban pressure gradient were measured in 180 lawn and wood soils of the Paris region (France). Iron (Fe), a major element, was used as reference element. Copper (Cu), cadmium (Cd), lead (Pb) and zinc (Zn) were of anthropogenic origin, while arsenic (As), chromium (Cr) and nickel (Ni) were of natural origin. Road traffic was identified as the main source of anthropogenic TEs. In addition, the industrial activity of the Paris region, especially cement plants, was identified as secondary source of Cd...
April 28, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28461082/mechanism-study-of-sulfur-fertilization-mediating-copper-translocation-and-biotransformation-in-rice-oryza-sativa-l-plants
#16
Lijuan Sun, Jianjun Yang, Huaxiang Fang, Chen Xu, Cheng Peng, Haomin Huang, Lingli Lu, Dechao Duan, Xiangzhi Zhang, Jiyan Shi
Metabolism of sulfur (S) is suggested to be an important factor for the homeostasis and detoxification of Cu in plants. We investigated the effects of S fertilizers (S(0), Na2SO4) on Cu translocation and biotransformation in rice plants by using multiple synchrotron-based techniques. Fertilization of S increased the biomass and yield of rice plants, as well as the translocation factor of Cu from root to shoot and shoot to grain, resulting in enhanced Cu in grain. Sulfur K-edge X-ray near edge structure (XANES) analysis showed that fertilization of S increased the concentration of glutathione in different rice tissues, especially in rice stem and leaf...
April 28, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28457957/detailed-adsorption-mechanism-of-plasmid-dna-by-newly-isolated-cellulose-from-waste-flower-spikes-of-thypa-latifolia-using-quantum-chemical-calculations
#17
Muhammad Mujtaba, Murat Kaya, Lalehan Akyuz, Demet Erdonmez, Bahar Akyuz, Idris Sargin
Current study was designed to use the newly obtained cellulose from waste flower spikes of Thypa latifolia plant for plasmid DNA adsorption. Cellulose was isolated according to a previously described method including acid and base treatment, and cellulose content was recorded as 17%. T. latifolia cellulose was physicochemically characterized via FT-IR, TGA and SEM techniques. Detailed mechanism of plasmid DNA adsorption by newly isolated cellulose was described using chemical quantum calculations. To check the effect of Cu(++) immobilization on the affinity of cellulose for plasmid DNA, copper ions were immobilized onto T...
April 27, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28453515/reliable-reference-genes-for-normalization-of-gene-expression-data-in-tea-plants-camellia-sinensis-exposed-to-metal-stresses
#18
Ming-Le Wang, Qing-Hui Li, Hua-Hong Xin, Xuan Chen, Xu-Jun Zhu, Xing-Hui Li
Tea plants [Camellia sinensis (L.) O. Kuntze] are an important leaf-type crop that are widely used for the production of non-alcoholic beverages in the world. Exposure to excessive amounts of heavy metals adversely affects the quality and yield of tea leaves. To analyze the molecular responses of tea plants to heavy metals, a reliable quantification of gene expression is important and of major importance herein is the normalization of the measured expression levels for the target genes. Ideally, stably expressed reference genes should be evaluated in all experimental systems...
2017: PloS One
https://www.readbyqxmd.com/read/28448940/modulation-of-cuo-nanoparticles-toxicity-to-green-pea-pisum-sativum-fabaceae-by-the-phytohormone-indole-3-acetic-acid
#19
Loren Ochoa, Illya A Medina-Velo, Ana C Barrios, Nestor J Bonilla-Bird, Jose A Hernandez-Viezcas, Jose R Peralta-Videa, Jorge L Gardea-Torresdey
The response of plants to copper oxide nanoparticles (nano-CuO) in presence of exogenous phytohormones is unknown. In this study, green pea (Pisum sativum) plants were cultivated to full maturity in soil amended with nano-CuO (10-100nm, 74.3% Cu), bulk-CuO (bCuO, 100-10,000nm, 79.7% Cu), and CuCl2 at 50 and 100mg/kg and indole-3-acetic acid (IAA) at 10 and 100μM. Results showed that IAA at 10 and 100μM, averaged over all Cu treatments, reduced the number of plants by ~23% and ~34%, respectively. IAA at 10μM, nano-CuO at 50mg/kg, b-CuO at 50mg/kg, and CuCl2 at 100mg/kg reduced pod biomass by about 50%...
April 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28439871/application-of-chemical-genomics-to-plant-bacteria-communication-a-high-throughput-system-to-identify-novel-molecules-modulating-the-induction-of-bacterial-virulence-genes-by-plant-signals
#20
Elodie Vandelle, Maria Rita Puttilli, Andrea Chini, Giulia Devescovi, Vittorio Venturi, Annalisa Polverari
The life cycle of bacterial phytopathogens consists of a benign epiphytic phase, during which the bacteria grow in the soil or on the plant surface, and a virulent endophytic phase involving the penetration of host defenses and the colonization of plant tissues. Innovative strategies are urgently required to integrate copper treatments that control the epiphytic phase with complementary tools that control the virulent endophytic phase, thus reducing the quantity of chemicals applied to economically and ecologically acceptable levels...
2017: Methods in Molecular Biology
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