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https://www.readbyqxmd.com/read/28650091/localized-micronutrient-patches-induce-lateral-root-foraging-and-chemotropism-in-nicotiana-attenuate
#1
Abigail P Ferrieri, Ricardo A R Machado, Carla C M Arce, Danny Kessler, Ian T Baldwin, Matthias Erb
Nutrients are distributed unevenly in the soil. Phenotypic plasticity in root growth and proliferation may enable plants to cope with this variation and effectively forage for essential nutrients. However, how micronutrients shape root architecture of plants in their natural environments is poorly understood. We employed a combination of field and laboratory-based assays to determine the capacity of Nicotiana attenuata to direct root growth towards localized nutrient patches in its native environment. Plants growing in nature displayed a particular root phenotype consisting of a single primary root and a few long, shallow lateral roots...
June 26, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28640221/use-of-chitosan-pva-hydrogels-with-copper-nanoparticles-to-improve-the-growth-of-grafted-watermelon
#2
Homero González Gómez, Francisca Ramírez Godina, Hortensia Ortega Ortiz, Adalberto Benavides Mendoza, Valentín Robledo Torres, Marcelino Cabrera De la Fuente
Modern agriculture requires alternative practices that improve crop growth without negatively affecting the environment, as resources such as water and arable land grow scarcer while the human population continues to increase. Grafting is a cultivation technique that allows the plant to be more efficient in its utilization of water and nutrients, while nanoscale material engineering provides the opportunity to use much smaller quantities of consumables compared to conventional systems but with similar or superior effects...
June 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28633101/assessment-of-environmental-and-health-risks-in-former-polymetallic-ore-mining-and-smelting-area-slovakia-spatial-distribution-and-accumulation-of-mercury-in-four-different-ecosystems
#3
Július Árvay, Lenka Demková, Martin Hauptvogl, Miloslav Michalko, Daniel Bajčan, Radovan Stanovič, Ján Tomáš, Miroslava Hrstková, Pavol Trebichalský
Former long-term mining and smelting of pollymetallic ores in the Middle Spiš area caused a serious contamination problem of the environment with heavy metals and metalloids, especially mercury (Hg). Several studies have reported concentration of Hg in the area but this paper provides first detailed characterization of Hg contamination of different environmental components in agricultural, forest, grassland and urban ecosystems. The ecosystems are in different distances from emission sources - former mercury and copper smelting plants in NE Slovakia...
June 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28631167/copper-and-ectopic-expression-of-the-arabidopsis-transport-protein-copt1-alter-iron-homeostasis-in-rice-oryza-sativa-l
#4
Amparo Andrés-Bordería, Fernando Andrés, Antoni Garcia-Molina, Ana Perea-García, Concha Domingo, Sergi Puig, Lola Peñarrubia
Copper deficiency and excess differentially affect iron homeostasis in rice and overexpression of the Arabidopsis high-affinity copper transporter COPT1 slightly increases endogenous iron concentration in rice grains. Higher plants have developed sophisticated mechanisms to efficiently acquire and use micronutrients such as copper and iron. However, the molecular mechanisms underlying the interaction between both metals remain poorly understood. In the present work, we study the effects produced on iron homeostasis by a wide range of copper concentrations in the growth media and by altered copper transport in Oryza sativa plants...
June 19, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28624948/metal-release-from-contaminated-leaf-litter-and-leachate-toxicity-for-the-freshwater-crustacean-gammarus-fossarum
#5
Florence Maunoury-Danger, Vincent Felten, Clément Bojic, Fabrice Fraysse, Mar Cosin Ponce, Odile Dedourge-Geffard, Alain Geffard, François Guérold, Michael Danger
Industrialization has left large surfaces of contaminated soils, which may act as a source of pollution for contiguous ecosystems, either terrestrial or aquatic. When polluted sites are recolonized by plants, dispersion of leaf litter might represent a non-negligible source of contaminants, especially metals. To evaluate the risks associated to contaminated leaf litter dispersion in aquatic ecosystems, we first measured the dynamics of metal loss from leaf litter during a 48-h experimental leaching. We used aspen (Populus tremula L...
June 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28624942/toxicity-of-56-substances-to-trees
#6
Lauge Peter Westergaard Clausen, Stefan Trapp
Toxicity data of substances to higher plants is needed for the purpose of risk assessment, site evaluation, phytoremediation, and plant protection. However, the results from the most common phytotoxicity tests, like the OECD algae and Lemna test, are not necessarily valid for higher terrestrial plants. The willow tree toxicity test uses inhibition of transpiration (aside of growth and water use efficiency) of willow cuttings grown in spiked solutions or soils as end point to quantify toxicity. This overview presents results from 60 studies including 24 new unpublished experiments for 56 different chemicals or substrates...
June 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28623252/natural-variation-in-arabidopsis-thaliana-cd-responses-and-the-detection-of-quantitative-trait-loci-affecting-cd-tolerance
#7
Sina Fischer, Thomas Spielau, Stephan Clemens
Metal tolerance is often a result of metal storage or distribution. Thus, with the goal of advancing the molecular understanding of such metal homeostatic mechanisms, natural variation of metal tolerance in Arabidopsis thaliana was investigated. Substantial variation exists in tolerance of excess copper (Cu), zinc (Zn) and cadmium (Cd). Two accessions, Col-0 and Bur-0, and a recombinant inbred line (RIL) population derived from these parents were chosen for further analysis of Cd and Zn tolerance variation, which is evident at different plant ages in various experimental systems and appears to be genetically linked...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28620728/contents-of-heavy-metals-in-chinese-edible-herbs-evidence-from-a-case-study-of-epimedii-folium
#8
Xiao-Hua Yang, Hua-Feng Zhang, Li-Li Niu, Ying Wang, Jiang-Hua Lai
Toxic heavy metal contamination in Chinese edible herbs has raised a worldwide concern. In this study, heavy metals in Epimedii Folium, an edible medicinal plant in China, were quantitatively analyzed. Variations of heavy metals in different species, in various organs (i.e., leaves, stems, and roots), in wild-growing and cultivated plants, and in 35 market samples of Epimedii Folium, were systematically investigated. In all of Epimedium samples, Hg (mercury) was not detectable (0.00 μg/g). Four species, Epimedium pubescens, Epimedium sagittatum, Epimedium brevicornu, and Epimedium wushanense, were found to contain Cu (copper) and Pb (lead)...
June 16, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28619286/neuroprotective-potential-of-aloe-arborescens-against-copper-induced-neurobehavioral-features-of-parkinson-s-disease-in-rat
#9
Abdellatif Abbaoui, Omar El Hiba, Halima Gamrani
Copper (Cu) is an important trace element for the organism survival, which ensures the normal functioning of different biosystems. However, excessive levels of this heavy metal are responsible for profound physiological alterations including the central nervous system. Numerous findings sustain the involvement of heavy metals, as an environmental risk factor such as copper (Cu), in the neuropathology of Parkinson's disease (PD) which is a chronic neurodegenerative disorder that principally affects the motor system...
June 12, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28614755/copper-and-nickel-co-treatment-alters-metal-uptake-and-stress-parameters-of-salix-purpurea%C3%A3-viminalis
#10
Kinga Drzewiecka, Mirosław Mleczek, Monika Gąsecka, Zuzanna Magdziak, Anna Budka, Tamara Chadzinikolau, Zygmunt Kaczmarek, Piotr Goliński
Simultaneous treatment of Salix purpurea×viminalis with copper (Cu(2+)) and nickel (Ni(2+)) altered metal phytoextraction rates in favor of leaves. Still, metal translocation patters remained unaffected (roots≈rods>leaves≥shoots), reaching ∼20 and 14.5mgkg(-1) dry weight in roots for Cu and Ni, respectively. Biometric parameters revealed overall growth inhibition correlated with Cu content in leaves, thus proving its negative effect on photosynthesis. Metal toxicity was strongly affirmed in the case of roots (∼90% loss of root biomass at 3mM), rather than in the above-ground organs...
June 1, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28613326/arbuscular-mycorrhizal-fungi-enhance-the-copper-tolerance-of-tagetes-patula-through-the-sorption-and-barrier-mechanisms-of-intraradical-hyphae
#11
Xishi Zhou, Lei Fu, Yan Xia, Luqing Zheng, Chen Chen, Zhenguo Shen, Yahua Chen
Arbuscular mycorrhizal fungi (AMF) are widespread soil fungi that can form endosymbiotic structures with the root systems of most plants and can improve the tolerance of host plants to heavy metals. In the present study, we investigated the effects of AMF (Glomus coronatum) inoculation on the tolerance of Tagetes patula L. to Cu. Almost all of the non-mycorrhizal plants exposed to 100 μM Cu died after 3 d, whereas phytotoxicity was only observed in mycorrhizal plants that were exposed to Cu concentrations greater than 100 μM...
June 14, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28611799/endophytic-paecilomyces-formosus-lhl10-augments-glycine-max-l-adaptation-to-ni-contamination-through-affecting-endogenous-phytohormones-and-oxidative-stress
#12
Saqib Bilal, Abdul L Khan, Raheem Shahzad, Sajjad Asaf, Sang-Mo Kang, In-Jung Lee
This study investigated the Ni-removal efficiency of phytohormone-producing endophytic fungi Penicillium janthinellum, Paecilomyces formosus, Exophiala sp., and Preussia sp. Among four different endophytes, P. formosus LHL10 was able to tolerate up to 1 mM Ni in contaminated media as compared to copper and cadmium. P. formosus LHL10 was further assessed for its potential to enhance the phytoremediation of Glycine max (soybean) in response to dose-dependent increases in soil Ni (0.5, 1.0, and 5.0 mM). Inoculation with P...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28605844/combination-of-aquatic-species-and-safeners-improves-the-remediation-of-copper-polluted-water
#13
Ivan Panfili, Maria Luce Bartucca, Eleonora Ballerini, Daniele Del Buono
In the last decades, many anthropogenic activities have resulted in heavy metal contamination of freshwaters and surrounding environments. This poses serious threats to human health. Phytoremediation is a cost-effective technology which is useful for remediating polluted soils and water. Recently, the use of aquatic free-floating plants has been proposed to remediate polluted water. In this context, a study on the capacity of two aquatic plants, Lemna minor (duckweed) and Salvinia auriculata (salvinia), to remediate Cu(+2) (Cu) polluted water was carried out...
June 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28604636/baccharis-trimera-less-dc-exhibits-an-anti-adipogenic-effect-by-inhibiting-the-expression-of-proteins-involved-in-adipocyte-differentiation
#14
Daniele de Souza Marinho do Nascimento, Ruth Medeiros Oliveira, Rafael Barros Gomes Camara, Dayanne Lopes Gomes, Jessika Fernanda Santiago Monte, Mariana Santana Santos Pereira Costa, Júlia Moraes Fernandes, Silvana Maria Zucolotto Langassner, Hugo Alexandre Oliveira Rocha
Baccharis trimera (Less.) DC (gorse) is a plant popularly used for the treatment of obesity. In this study, we prepared three B. trimera extracts aqueous extract (AE), decoction (AE-D), and methanol extract (ME) and investigated their antioxidant effects in six different tests and their anti-adipogenic effect in 3T3-L1 cells. The extracts showed a dose-dependent antioxidant activity in all tests. AE was the most potent antioxidant in copper and ferric ion chelation assays, whereas AE-D was the most potent in superoxide and hydroxyl radical scavenging assays, reducing power assay, and total antioxidant capacity analysis...
June 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28597415/effects-of-cuo-nanoparticles-on-lemna-minor
#15
Guanling Song, Wenhua Hou, Yuan Gao, Yan Wang, Lin Lin, Zhiwei Zhang, Qiang Niu, Rulin Ma, Lati Mu, Haixia Wang
BACKGROUND: Copper dioxide nanoparticles (NPs), which is a kind of important and widely used metal oxide NP, eventually reaches a water body through wastewater and urban runoff. Ecotoxicological studies of this kind of NPs effects on hydrophyte are very limited at present. Lemna minor was exposed to media with different concentrations of CuO NPs, bulk CuO, and two times concentration of Cu(2+) released from CuO NPs in culture media. The changes in plant growth, chlorophyll content, antioxidant defense enzyme activities [i...
December 2016: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28593515/cu-resistant-kocuria-sp-crb15-a-potential-pgpr-isolated-from-the-dry-tailing-of-rakha-copper-mine
#16
Arti Hansda, Vipin Kumar, Anshumali
Rhizobacteria may enhance biomass production and heavy metal tolerance of plants under stress conditions. The present study was carried out for isolation of metal-resistant bacteria that can be further utilized for phytoremediation process. A potential metal-resistant strain CRB15 was isolated from rhizospheric region of Saccharum spontaneum that was found to be resistant against Cu (6.29 mM), Zn (3.25 mM), Pb (1.5 mM), Ni (1.25 mM), and Cd (0.25 mM). SEM analysis was performed for evaluation of morphological changes on bacterial isolate...
June 2017: 3 Biotech
https://www.readbyqxmd.com/read/28585012/variability-of-zinc-copper-and-lead-contents-in-sludge-of-the-municipal-stormwater-treatment-plant
#17
Tomasz Zubala, Magdalena Patro, Patrycja Boguta
Several years of observations enabled us to assess the extent and variability of heavy metal contamination (Zn, Cu and Pb) of the sludge of the municipal stormwater treatment plant (the town of Puławy, Poland). In terms of size (high capacity) and innovation, it is the only facility of this kind in the country. It collects rainwater run-offs from two catchments (separate inlets) with a total area of about 500 ha. The concentration of the analysed metals is characterised by a large spatial and temporal diversity...
June 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28584526/analyses-of-mineral-content-and-heavy-metal-of-honey-samples-from-south-and-east-region-of-turkey-by-using-icp-ms
#18
Serap Kılıç Altun, Hikmet Dinç, Nilgün Paksoy, Füsun Karaçal Temamoğulları, Mehmet Savrunlu
The substantial of mineral ingredients in honey may symbolize the existence of elements in the plants and soil of the vicinity wherein the honey was taken. The aim of this study was to detect the levels of 13 elements (Potassium (K), Sodium (Na), Calcium (Ca), Iron (Fe), Zinc (Zn), Cadmium (Cd), Copper (Cu), Manganese (Mn), Lead (Pb), Nickel (Ni), Chromium (Cr), Aluminum (Al), and Selenium (Se)) in unifloral and multifloral honey samples from south and east regions of Turkey. Survey of 71 honey samples from seven different herbal origins, picked up from the south and east region of Turkey, was carried out to determine their mineral contents during 2015-2016...
2017: International Journal of Analytical Chemistry
https://www.readbyqxmd.com/read/28584242/solution-processed-cu2se-nanocrystal-films-with-bulk-like-thermoelectric-performance
#19
Jason D Forster, Jared J Lynch, Nelson E Coates, Jun Liu, Hyejin Jang, Edmond Zaia, Madeleine P Gordon, Maxime Szybowski, Ayaskanta Sahu, David G Cahill, Jeffrey J Urban
Thermoelectric power generation can play a key role in a sustainable energy future by converting waste heat from power plants and other industrial processes into usable electrical power. Current thermoelectric devices, however, require energy intensive manufacturing processes such as alloying and spark plasma sintering. Here, we describe the fabrication of a p-type thermoelectric material, copper selenide (Cu2Se), utilizing solution-processing and thermal annealing to produce a thin film that achieves a figure of merit, ZT, which is as high as its traditionally processed counterpart, a value of 0...
June 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28578238/combined-effects-of-environmental-disturbance-and-climate-warming-on-insect-herbivory-in-mountain-birch-in-subarctic-forests-results-of-26-year-monitoring
#20
M V Kozlov, V Zverev, E L Zvereva
Both pollution and climate affect insect-plant interactions, but the combined effects of these two abiotic drivers of global change on insect herbivory remain almost unexplored. From 1991 to 2016, we monitored the population densities of 25 species or species groups of insects feeding on mountain birch (Betula pubescens ssp. czerepanovii) in 29 sites and recorded leaf damage by insects in 21 sites in subarctic forests around the nickel-copper smelter at Monchegorsk, north-western Russia. The leaf-eating insects demonstrated variable, and sometimes opposite, responses to pollution-induced forest disturbance and to climate variations...
June 1, 2017: Science of the Total Environment
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