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https://www.readbyqxmd.com/read/29778169/rhizophagus-irregularis-influences-as-and-p-uptake-by-alfafa-and-the-neighboring-non-host-pepperweed-growing-in-an-as-contaminated-soil
#1
Xin Zhang, Baihui Ren, Songlin Wu, Yuqing Sun, Baodong Chen, Ruojuan Li
It was documented that arbuscular mycorrhiza fungi (AMF) play an important role in protecting host plants against arsenic (As) contamination. However, most terrestrial ecosystems contain a considerable number of nonmycorrhizal plants. So far little information is available for the interaction of such non-host plants with AMF under As contaminations. By using a dual compartment cultivation system with a plastic board or a nylon mesh separating roots of non-host pepperweed from roots of the AM-host alfafa plants, avoiding direct root competition, the two plant species were grown separately or partially separated (with rhizosphere effects) in the presence or absence of the AMF Rhizophagus irregularis in As-contaminated soil...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29775821/vermiremediation-of-metal-loid-s-via-eichornia-crassipes-phytomass-extraction-a-sustainable-technique-for-plant-amelioration
#2
Arnab Majumdar, Anil Barla, Munish Kumar Upadhyay, Dibyarpita Ghosh, Punarbasu Chaudhuri, Sudhakar Srivastava, Sutapa Bose
Eichhornia crassipes (water hyacinth), imparts deficiency of soluble arsenic and other toxic metal (loid)s through rhizofiltration and phytoaccumulation. Without proper management strategy, this phytoremediation of metal (loid)s might fail and get reverted back to the environment, contaminating the nearby water bodies. This study, focused on bio-conversion of phytoremediating hyacinths, spiked with 100 times and greater arsenic, lead and cadmium concentrations than the average water contamination, ranging in 58...
May 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29775096/silicon-alleviates-arsenic-induced-toxicity-in-wheat-through-vacuolar-sequestration-and-ros-scavenging
#3
Md Monayem Hossain, Most Amena Khatun, Md Najmul Haque, Md Azizul Bari, Md Firoz Alam, Abul Mandal, Ahmad Humayan Kabir
Arsenic (As) is a phytotoxic element causing health hazards. This work investigates whether and how silicon (Si) alleviates As toxicity in wheat. The addition of Si under As-stress significantly improved morphophysiological characteristics, total protein, and membrane stability compared to As-stressed plants, suggesting that Si does have critical roles in As detoxification in wheat. Analysis of arsenate reductase activity and phytosiderophore (PS) release reveals their no involvement in the Si-mediated alleviation of As in wheat...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29772270/identification-of-certain-panax-species-to-be-potential-substitutes-for-panax-notoginseng-in-hemostatic-treatments
#4
REVIEW
Bin Rui Yang, Sze Chung Yuen, Guang Yi Fan, Wei-Hong Cong, Siu-Wai Leung, Simon Ming-Yuen Lee
Panax notoginseng (Burkill) F. H. Chen ex C. H. Chow (P. notoginseng) is a highly valued Chinese materia medica having a hemostatic effect and mainly used for the treatment of trauma and ischemic cardiovascular diseases. Stringent growth requirements, weak resistance to insect pests and plant diseases, arsenic contamination and continuous cropping constitute hurdles to further increases in the agricultural production of P. notoginseng. This review focuses on the traditional uses (based on traditional Chinese medicine theory), major chemical components, biological activities, pharmacological properties, geographical distributions and historical development of taxonomy of P...
May 14, 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29757950/changes-in-arsenic-copper-iron-manganese-and-zinc-levels-resulting-from-the-application-of-poultry-litter-to-agricultural-soils
#5
Richard D Foust, Michael Phillips, Killian Hull, Dariia Yehorova
Twelve applications of poultry litter were made to a 2.1-ha field located in the Shenandoah Valley of Virginia, United States (USA), between March 1999 and August 2014. The field was planted with bermudagrass ( Cynodon dactylon ) and used as a pasture on an active farm. Copper, iron, manganese, zinc, and arsenic concentrations in the poultry litter were measured, and the application rates of these metals were calculated. The median application rates were: Cu, 1.32 kg/ha, Fe, 5.57 kg/ha, Mn, 1.80 kg/ha, Zn, 1...
May 14, 2018: Toxics
https://www.readbyqxmd.com/read/29754057/copper-oxide-nanoparticles-and-arsenic-interact-to-alter-seedling-growth-of-rice-oryza-sativa-japonica
#6
Jing Liu, Birendra Dhungana, George P Cobb
Arsenic (As) causes phytotoxicity to rice plants, decreases rice production and causes serious human health concerns due to rice consumption. Additional stresses may be posed to rice plants due to the increasing release into the environment by the expanding production and application of copper oxide nanoparticles (nCuO). The influence of nCuO on As uptake in and effects on rice (Oryza sativa japonica) are explored here for the first time. An 18-d factorial experiment was conducted to determine main effects of nCuO (0, 0...
May 4, 2018: Chemosphere
https://www.readbyqxmd.com/read/29751151/different-administration-patterns-of-docosahexaenoic-acid-in-combating-cytotoxic-manifestations-due-to-arsenic-trioxide-acute-promyelocytic-leukemia-drug-induced-redox-imbalance-in-hepatocytes
#7
S Abhilash, R Siviyasankar, P Binu, P Arathi, R Harikumaran Nair
Docosahexaenoic acid (DHA) obtained from fish and plant sources is an essential dietary fatty acid and an important cell membrane structural component. The acute promyelocytic leukemia (APL) drug arsenic trioxide (As2 O3 ), causes hepatotoxicity. We evaluated the protective potential of DHA as pre/ combination/ post-administration patterns against As2 O3 induced toxicity. The therapeutic concentration of As2 O3 (10 µM) resulted in cytotoxicity with a significant (p < 0.05) variation from the control group...
May 8, 2018: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/29749629/decreasing-arsenic-accumulation-in-rice-by-overexpressing-osnip1-1-and-osnip3-3-through-disrupting-arsenite-radial-transport-in-roots
#8
Sheng-Kai Sun, Yi Chen, Jing Che, Noriyuki Konishi, Zhong Tang, Anthony J Miller, Jian Feng Ma, Fang-Jie Zhao
Rice is a major dietary source of the toxic metalloid arsenic. Reducing arsenic accumulation in rice grain is important for food safety. We generated transgenic rice overexpressing two aquaporin genes, OsNIP1;1 and OsNIP3;3, under the control of a maize ubiquitin promoter or the rice OsLsi1 promoter, and tested the effect on arsenite uptake and translocation. OsNIP1;1 and OsNIP3;3 were highly permeable to arsenite in Xenopus oocyte assays. Both transporters were localized at the plasma membrane. Knockout of either gene had little effect on arsenite uptake or translocation...
May 11, 2018: New Phytologist
https://www.readbyqxmd.com/read/29748929/toxicological-aspect-of-some-selected-medicinal-plant-samples-collected-from-djelfa-algeria-region
#9
Samir Begaa, Mohammed Messaoudi
Instrumental neutron activation analysis (INAA) has been used to determine the concentration of some toxic chemical elements in a variety of aromatic plants samples collected from Djelfa region. In the present work, eight medicinal plants were examined, such as Artemisia herba-alba Asso., Artemisia compestris L., Laurus nobilis L., Origanum vulgare L., Mentha spicata L., Rosmarinus officinalis L., Mentha pulegium L., and Pistacia lentiscus L. The levels of toxic elements were compared to their daily total intake; Arsenic was present in all plant species examined, with a concentration ranging from 0...
May 10, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29739310/genetic-diversity-and-characterization-of-arsenic-resistant-endophytic-bacteria-isolated-from-pteris-vittata-an-arsenic-hyperaccumulator
#10
Yunfu Gu, Yingyan Wang, Yihao Sun, Ke Zhao, Quanju Xiang, Xiumei Yu, Xiaoping Zhang, Qiang Chen
BACKGROUND: Alleviating arsenic (As) contamination is a high-priority environmental issue. Hyperaccumulator plants may harbor endophytic bacteria able to detoxify As. Therefore, we investigated the distribution, diversity, As (III) resistance levels, and resistance-related functional genes of arsenite-resistant bacterial endophytes in Pteris vittata L. growing in a lead-zinc mining area with different As contamination levels. RESULTS: A total of 116 arsenite-resistant bacteria were isolated from roots of P...
May 8, 2018: BMC Microbiology
https://www.readbyqxmd.com/read/29736625/two-facets-of-world-arsenic-problem-solution-crop-poisoning-restriction-and-enforcement-of-phytoremediation
#11
REVIEW
Monika Kofroňová, Petra Mašková, Helena Lipavská
This review provides insights into As toxicity in plants with focus on photosynthesis and sugar metabolism as important arsenic targets and simultaneously defence tools against accompanying oxidative stress. Heavy metal contamination is a great problem all over the world. Arsenic, a metalloid occurring naturally in the Earth's crust, also massively spreads out in the environment by human activities. Its accumulation in crops poses a severe health risk to humans and animals. Besides the restriction of human-caused contamination, there are two basic ways how to cope with the problem: first, to limit arsenic accumulation in harvestable parts of the crops; second, to make use of some arsenic hyperaccumulating plants for phytoremediation of contaminated soils and waters...
May 7, 2018: Planta
https://www.readbyqxmd.com/read/29732668/3-4-dihydroxybenzaldehyde-lowers-ros-generation-and-protects-human-red-blood-cells-from-arsenic-iii-induced-oxidative-damage
#12
Nikhil Maheshwari, Fahim Halim Khan, Riaz Mahmood
Arsenic (As) is a potent environmental toxicant and chronic exposure to it results in various malignancies in humans. Oxidative stress has been implicated in the etiopathogenesis of As-induced toxicity. This investigated the protective effect of plant antioxidant 3,4-dihydroxybenzaldehyde (DHB) on sodium meta-arsenite (SA), an As-(III) compound, induced oxidative damage in human red blood cells (RBC). The RBC were first incubated with different concentrations of DHB and then treated with SA at 37°C. Hemolysates were prepared and assayed for various biochemical parameters...
May 6, 2018: Environmental Toxicology
https://www.readbyqxmd.com/read/29725058/an-endophytic-bacterial-consortium-modulates-multiple-strategies-to-improve-arsenic-phytoremediation-efficacy-in-solanum-nigrum
#13
Gairik Mukherjee, Chinmay Saha, Nabanita Naskar, Abhishek Mukherjee, Arghya Mukherjee, Susanta Lahiri, Arun Lahiri Majumder, Anindita Seal
Endophytic microbes isolated from plants growing in contaminated habitats possess specialized properties that help their host detoxify the contaminant/s. The possibility of using microbe-assisted phytoremediation for the clean-up of Arsenic (As) contaminated soils of the Ganga-Brahmaputra delta of India, was explored using As-tolerant endophytic microbes from an As-tolerant plant Lantana camara collected from the contaminated site and an intermediate As-accumulator plant Solanum nigrum. Endophytes from L. camara established within S...
May 3, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29723047/statistical-optimization-of-the-phytoremediation-of-arsenic-by-ludwigia-octovalvis-in-a-pilot-reed-bed-using-response-surface-methodology-rsm-versus-an-artificial-neural-network-ann
#14
Harmin Sulistiyaning Titah, Mohd Izuan Effendi Bin Halmi, Siti Rozaimah Sheikh Abdullah, Hassimi Abu Hasan, Mushrifah Idris, Nurina Anuar
In this study, the removal of arsenic (As) by plant, Ludwigia octovalvis, in a pilot reed bed was optimized. A Box-Behnken design was employed including a comparative analysis of both Response Surface Methodology (RSM) and an Artificial Neural Network (ANN) for the prediction of maximum arsenic removal. The predicted optimum condition using the desirability function of both models was 39 mg kg-1 for the arsenic concentration in soil, an elapsed time of 42 days (the sampling day) and an aeration rate of 0...
June 7, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29715659/how-much-water-is-required-for-coal-power-generation-an-analysis-of-gray-and-blue-water-footprints
#15
Xiaotian Ma, Donglu Yang, Xiaoxu Shen, Yijie Zhai, Ruirui Zhang, Jinglan Hong
Although water resource shortage is closely connected with coal-based electricity generation, relevant water footprint analyses remain limited. This study aims to address this limitation by conducting a water footprint analysis of coal-based electricity generation in China for the first time to inform decision-makers about how freshwater consumption and wastewater discharge can be reduced. In China, 1 kWh of electricity supply obtained 1.78 × 10-3  m3 of gray water footprint in 2015, and the value is 1...
April 28, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29715631/silicon-improves-growth-and-alleviates-oxidative-stress-in-rice-seedlings-oryza-sativa-l-by-strengthening-antioxidant-defense-and-enhancing-protein-metabolism-under-arsanilic-acid-exposure
#16
Anjing Geng, Xu Wang, Lishu Wu, Fuhua Wang, Zhichao Wu, Hui Yang, Yan Chen, Dian Wen, Xiangxiang Liu
Organoarsenic arsanilic acid (ASA) contamination of paddy soil is a serious but less concerned hazard to agriculture and health of people consuming rice as staple food, for rice is one major pathway of arsenic (As) exposure to human food. To date little research has studied the effect of ASA on biochemical process of rice. Silicon (Si) application is able to reduce the toxicities of heavy metals in numerous plants, but little information about ASA. This work investigated whether and how Si influenced alleviation of ASA toxicity in rice at biochemical level to have a better understanding of defense mechanism by Si against ASA stress...
April 28, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29704021/cytotoxic-assessment-of-chromium-and-arsenic-using-chromosomal-behavior-of-root-meristem-in-allium-cepa-l
#17
Kiran Gupta, Kumkum Mishra, Sudhakar Srivastava, Amit Kumar
A study was performed for phyto-genotoxic assay of chromium (Cr) and arsenic (As) through Allium cepa. Various concentrations (0, 1, 3, 6 and 12 mg L-1 ) of Cr and As for 48 and 168 h time points exposed to A. cepa. The phytotoxic effects of metal(loid) were evident through inhibited root length and root protein. Metal(loid) toxicity also lead to genotoxic effects, which included depression of mitotic index and increased frequency of chromosomes aberrations like break, fragments, c-metaphase, multipolar arrangements etc...
April 27, 2018: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29682336/total-and-bioaccessible-soil-arsenic-and-lead-levels-and-plant-uptake-in-three-urban-community-gardens-in-puerto-rico
#18
John Misenheimer, Clay Nelson, Evelyn Huertas, Myriam Medina-Vera, Alex Prevatte, Karen Bradham
Arsenic (As) and lead (Pb) are two contaminants of concern associated with urban gardening. In Puerto Rico, data currently is limited on As and Pb levels in urban garden soils, soil metal (loid) bioaccessibility, and uptake of As and Pb in soil by edible plants grown in the region. This study examined total and bioaccessible soil As and Pb concentrations and accumulation in 10 commonly grown garden plants collected from three urban community gardens in Puerto Rico. Bioavailability values were predicted using bioaccessibility data to compare site-specific bioavailability estimates to commonly used default exposure assumptions...
2018: Geosciences
https://www.readbyqxmd.com/read/29679351/determination-of-trace-elements-in-infant-formulas-available-on-polish-market
#19
Ewelina Chajduk, Marta Pyszynska, Halina Polkowska-Motrenko
The aim of this study was to assess the levels of 13 essential and toxic elements (As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Se, V, Zn) in the infant formulas, available on Polish market. Selected food samples were of animal (cow- and goat-based milks) and plant (soy-based milk, hypoallergic products, grain porridges) origin. Two analytical techniques, inductively coupled plasma mass spectrometry (ICP-MS) and neutron activation analysis (NAA), have been complementarily applied to analyze elemental content of 16 formulas dedicated for infants between 0 and 8 months...
April 21, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29677647/arsenic-effects-on-some-photophysical-parameters-of-cichorium-intybus-under-different-radiation-and-water-irrigation-regimes
#20
Gabriela Cordon, Analia Iriel, Alicia Fernández Cirelli, M Gabriela Lagorio
The presence of arsenic (As) in groundwater is a major problem in several parts of Latin America. In the present work, non-destructive approaches to monitor the effects of As on plants of Cichorium intybus, an herbaceous Asteraceae, were explored. In this sense, the effects of As at different levels of water and radiation were evaluated on these crops. Plants were grown in a greenhouse, watered daily with As solutions and exposed to different water and/or light conditions for four months, using a three-factor (As, water, radiation) and two-level resource (As vs non As, field capacity vs half-field capacity condition, light vs shade condition) factorial design...
April 10, 2018: Chemosphere
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