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https://www.readbyqxmd.com/read/29155067/contrasting-roles-of-fungal-siderophores-in-maintaining-iron-homeostasis-in-epichlo%C3%A3-festucae
#1
Natasha T Forester, Geoffrey A Lane, Melle Steringa, Iain L Lamont, Linda J Johnson
The symbiosis between Epichloë festucae and its host perennial ryegrass (Lolium perenne) is a model system for mutualistic interactions in which the fungal endophyte grows between plant shoot cells and acquires host nutrients to survive. E. festucae synthesises the siderophore epichloënin A (EA) via SidN, a non-ribosomal peptide synthetase (NRPS). EA is involved in the acquisition of iron, an essential micronutrient, as part of the process of maintaining a stable symbiotic interaction. Here, we mutated a different NRPS gene sidC and showed that it is required for production of a second siderophore ferricrocin (FC)...
November 15, 2017: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/29150559/a-program-for-iron-economy-during-deficiency-targets-specific-fe-proteins
#2
Laura J Hantzis, Gretchen E Kroh, Courtney E Jahn, Michael Cantrell, Graham Peers, Marinus Pilon, Karl Ravet
Iron (Fe) is an essential element for plants, utilized in nearly every cellular process. Because the adjustment of uptake under Fe limitation cannot satisfy all demands, plants need to acclimate their physiology and biochemistry, especially in their chloroplasts, which have a high demand for Fe. To investigate if a program exists for the utilization of Fe under deficiency, we analyzed how hydroponically grown Arabidopsis thaliana adjusts its physiology and Fe protein composition in vegetative photosynthetic tissue, during Fe deficiency...
November 17, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29149570/seagrass-mediated-phosphorus-and-iron-solubilisation-in-tropical-sediments
#3
Kasper Elgetti Brodersen, Klaus Koren, Maria Mosshammer, Peter Ralph, Michael Kühl, Jakob Santner
Tropical seagrasses are nutrient limited owing to the strong phosphorus fixation capacity of carbonate-rich sediments, yet they form densely-vegetated, multi-species meadows in oligotrophic tropical waters. Using a novel combination of high-resolution, two-dimensional chemical imaging of O2, pH, iron, sulphide, calcium and phosphorus, we found that tropical seagrasses are able to mobilize the essential nutrients iron and phosphorus in their rhizosphere via multiple biogeochemical pathways. We show that tropical seagrasses mobilize phosphorus and iron within their rhizosphere via plant-induced local acidification, leading to dissolution of carbonates and release of phosphate, and via local stimulation of microbial sulphide production, causing reduction of insoluble Fe(III) oxyhydroxides to dissolved Fe(II) with concomitant phosphate release into the rhizosphere porewater...
November 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29144300/enhancing-dewaterability-of-waste-activated-sludge-by-combined-oxidative-conditioning-process-with-zero-valent-iron-and-peroxymonosulfate
#4
Xu Zhou, Wenbiao Jin, Hongyi Chen, Chuan Chen, Songfang Han, Renjie Tu, Wei Wei, Shu-Hong Gao, Guo-Jun Xie, Qilin Wang
The enhancement of sludge dewaterability is of great importance for facilitating the sludge disposal during the operation of wastewater treatment plants. In this study, a novel oxidative conditioning approach was applied to enhance the dewaterability of waste activated sludge by the combination of zero-valent iron (ZVI) and peroxymonosulfate (PMS). It was found that the dewaterability of sludge was significantly improved after the addition of ZVI (0-4 g/g TSS) (TSS: total suspended solids) and PMS (0-1 g/g TSS)...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29144296/dynamic-desorption-of-arsenic-from-polymer-supported-hydrated-iron-iii-oxide-in-a-wastewater-treatment-plant
#5
Jian-Long Hu, Xiao-Song Yang, Ting Liu, Li-Nan Shao, Wang Zhang
Polymer-supported hydrated iron(III) oxide (PHIO) was successfully applied as adsorbent for arsenic removal in a wastewater treatment plant in Nandan, China. The practical PHIO adsorbent samples (PHIO-P) were collected from the adsorption column of the wastewater treatment plant, and desorption experiments of the adsorbent were carried out. Our results showed that the formation of precipitates on the surface of PHIO-P might block the porous channel of the adsorbent and decrease its arsenic adsorption capacity...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29134675/analytical-approach-dissipation-pattern-and-risk-assessment-of-pesticide-residue-in-green-leafy-vegetables-a-comprehensive-review
#6
REVIEW
Waziha Farha, A M Abd El-Aty, Md Musfiqur Rahman, Ji Hoon Jeong, Ho-Chul Shin, Jing Wang, Sung Shik Shin, Jae-Han Shim
The category of "leafy vegetables" comprises a wide range of plants, including cabbage, lettuce, leeks, spinach, Swiss chard, and kale, and it forms a significant component of the human diet. Typically, leafy vegetables are low in calories and fat, are great sources of vitamins, protein, dietary fibre, minerals (including iron, calcium, and nitrates), and are rich in phytochemicals. To counter the impact of pests on vegetables, a broad variety of pesticides is used. Because of their large surface areas, leafy vegetables are expected to have high residual pesticide levels...
November 14, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29132002/brassica-napus-has-a-key-role-in-the-recovery-of-the-health-of-soils-contaminated-with-metals-and-diesel-by-rhizoremediation
#7
Rafael G Lacalle, María T Gómez-Sagasti, Unai Artetxe, Carlos Garbisu, José M Becerril
Contaminated soils are frequently characterized by the simultaneous presence of organic and inorganic contaminants, as well as a poor biological and nutritional status. Rhizoremediation, the combined use of phytoremediation and bioremediation, has been proposed as a Gentle Remediation Option to rehabilitate multi-contaminated soils. Recently, newer techniques, such as the application of metallic nanoparticles, are being deployed in an attempt to improve traditional remediation options. In order to implement a phytomanagement strategy on calcareous alkaline peri-urban soils simultaneously contaminated with several metals and diesel, we evaluated the effectiveness of Brassica napus L...
November 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29129658/overcoming-antibiotic-resistance-is-siderophore-trojan-horse-conjugation-an-answer-to-evolving-resistance-in-microbial-pathogens
#8
REVIEW
Kalyani Dhusia, Archana Bajpai, P W Ramteke
Comparative study of siderophore biosynthesis pathway in pathogens provides potential targets for antibiotics and host drug delivery as a part of computationally feasible microbial therapy. Iron acquisition using siderophore models is an essential and well established model in all microorganisms and microbial infections a known to cause great havoc to both plant and animal. Rapid development of antibiotic resistance in bacterial as well as fungal pathogens has drawn us at a verge where one has to get rid of the traditional way of obstructing pathogen using single or multiple antibiotic/chemical inhibitors or drugs...
November 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29125533/sequencing-and-de-novo-assembly-of-the-toxicodendron-radicans-poison-ivy-transcriptome
#9
Alexandra J Weisberg, Gunjune Kim, James H Westwood, John G Jelesko
Contact with poison ivy plants is widely dreaded because they produce a natural product called urushiol that is responsible for allergenic contact delayed-dermatitis symptoms lasting for weeks. For this reason, the catchphrase most associated with poison ivy is "leaves of three, let it be", which serves the purpose of both identification and an appeal for avoidance. Ironically, despite this notoriety, there is a dearth of specific knowledge about nearly all other aspects of poison ivy physiology and ecology...
November 10, 2017: Genes
https://www.readbyqxmd.com/read/29124638/foliar-application-with-nano-silicon-reduced-cadmium-accumulation-in-grains-by-inhibiting-cadmium-translocation-in-rice-plants
#10
Rui Chen, Changbo Zhang, Yanling Zhao, Yongchun Huang, Zhongqi Liu
Nano-silicon (Si) may be more effective than regular fertilizers in protecting plants from cadmium (Cd) stress. A field experiment was conducted to study the effects of nano-Si on Cd accumulation in grains and other organs of rice plants (Oryza sativa L. cv. Xiangzaoxian 45) grown in Cd-contaminated farmland. Foliar application with 5~25 mM nano-Si at anthesis stage reduced Cd concentrations in grains and rachises at maturity stage by 31.6~64.9 and 36.1~60.8%, respectively. Meanwhile, nano-Si application significantly increased concentrations of potassium (K), magnesium (Mg), and iron (Fe) in grains and rachises, but imposed little effect on concentrations of calcium (Ca), zinc (Zn), and manganese (Mn) in them...
November 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29121576/soil-geochemical-factors-regulate-cd-accumulation-by-metal-hyperaccumulating-noccaea-caerulescens-j-presl-c-presl-f-k-mey-in-field-contaminated-soils
#11
Carla E Rosenfeld, Rufus L Chaney, Carmen E Martínez
Cadmium contamination in soil is a substantial global problem, and of significant concern due to high food-chain transfer. Cadmium hyperaccumulators are of particular interest because of their ability to tolerate and take up significant amounts of heavy metal pollution from soils. One particular plant, Noccaea caerulescens (formerly, Thlaspi caerulescens), has been extensively studied in terms of its capacity to accumulate heavy metals (specifically Zn and Cd), though these studies have primarily utilized hydroponic and metal-spiked model soil systems...
November 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29121354/exogenous-glutathione-enhances-cadmium-accumulation-and-alleviates-its-toxicity-in-populus-%C3%A3-canescens
#12
Shen Ding, Chaofeng Ma, Wenguang Shi, Wenzhe Liu, Yan Lu, Qifeng Liu, Zhi-Bin Luo
Glutathione (GSH) plays an important role in cadmium (Cd) tolerance in woody plants, but the underlying mechanisms remain largely unknown. To elucidate the physiological and transcriptional regulation mechanisms of GSH-mediated Cd tolerance in woody plants, we exposed Populus × canescens (Ait.) Smith saplings to either 0 or 75 μM Cd together with one of three external GSH levels. Glutathione treatments include buthionine sulfoximine (BSO, an inhibitor of GSH biosynthesis), no external GSH and exogenous GSH...
November 7, 2017: Tree Physiology
https://www.readbyqxmd.com/read/29110513/ankaferd-influences-mrna-expression-of-iron-regulated-genes-during-iron-deficiency-anemia
#13
Afife Gulec, Sukru Gulec
Ankaferd Blood Stopper (ABS) comprises a mixture of plants and stops bleeding via forming a protein network by erythroid aggregation. Bleeding causes reduction of iron levels in body. It has been indicated that ABS contains significant amount of iron. Thus, we investigated the biological activity of ABS-derived iron on iron-regulated genes during iron-deficiency anemia (IDA). IDA We selected Caco-2 and HepG2 cell lines as in vitro models of human intestine and liver, respectively. Iron deficiency anemia was induced by deferoxamine...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/29109370/olive-olea-europaea-l-biophenols-a-nutriceutical-against-oxidative-stress-in-sh-sy5y-cells
#14
Syed Haris Omar, Philip G Kerr, Christopher J Scott, Adam S Hamlin, Hassan K Obied
Plant biophenols have been shown to be effective in the modulation of Alzheimer's disease (AD) pathology resulting from free radical-induced oxidative stress and imbalance of the redox chemistry of transition metal ions (e.g., iron and copper). On the basis of earlier reported pharmacological activities, olive biophenols would also be expected to have anti-Alzheimer's activity. In the present study, the antioxidant activity of individual olive biophenols (viz. caffeic acid, hydroxytyrosol, oleuropein, verbascoside, quercetin, rutin and luteolin) were evaluated using superoxide radical scavenging activity (SOR), hydrogen peroxide (H₂O₂) scavenging activity, and ferric reducing ability of plasma (FRAP) assays...
October 29, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29107226/the-fingerprint-nature-of-pcdd-in-iron-ore-sinter-strand-emissions-the-effect-of-suppressants-and-alternative-fuels-and-the-potential-for-comparison-with-the-isomer-profile-of-pcdf
#15
Tze C Ooi, Dennis Thompson, David R Anderson, Ray Fisher
It has been previously shown that the isomer profile of PCDF emissions from iron ore sinter plant only varies within limits even when suppressants or alternative fuels are added, to the extent that it can be said to have a 'fingerprint'. The isomer profiles of PCDD from tetra- to hexacholrodibenzo-p-dioxin from the same samples examined for PCDF emissions have been obtained, and show the same tendency for a 'fingerprint ' isomer distribution to occur. Occasional exceptionally high isomer abundances are observed, but these are uncommon...
October 19, 2017: Chemosphere
https://www.readbyqxmd.com/read/29103124/features-and-influencing-factors-of-nitrogen-and-phosphorus-diffusive-fluxes-at-the-sediment-water-interface-of-erhai-lake
#16
Haichao Zhao, Li Zhang, Shengrui Wang, Lixin Jiao
Nitrogen and phosphorus diffusion at the sediment-water interface is vital to the water quality of lakes. In this paper, N and P diffusive fluxes at the sediment-water interface in Erhai Lake were studied using the sediment-pore water diffusive flux method. Characteristics of temporal and spatial variation of N and P diffusive fluxes were analyzed. Effects of the physicochemical properties of sediments and overlying water were discussed. Results showed that (1) the total N and P diffusive fluxes at the sediment-water interface of Erhai Lake are relatively low...
November 4, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29098984/long-term-monitoring-of-a-water-treatment-technology-designed-for-radium-removal-removal-efficiencies-and-norm-formation
#17
Liie Lumiste Hill, Siiri Suursoo, Madis Kiisk, Alar Jantsikene, Nele Nilb, Rein Munter, Enn Realo, Rein Koch, Kaisa Putk, Maria Leier, Taavi Vaasma, Kadri Isakar
A drinking water treatment plant in Viimsi, Estonia was monitored over three years for iron, manganese, radium-226, radium-228, and their daughter nuclides in order to determine the efficiency of the treatment process, get an insight of the removal mechanisms and interactions between radium, iron, and manganese, and assess the overall longevity and performance of the technology and possible build-up of NORM from the treatment process. During the study, samples were collected from raw water, first and second stage filtrate, consumer water, backwash water, and filter materials...
November 3, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/29098587/water-quality-and-resource-management-in-the-dairy-industry
#18
Joanna Boguniewicz-Zablocka, Iwona Klosok-Bazan, Vincenzo Naddeo
Food industry is one of the most important and fastest growing sectors of economy in Poland. This sector is also characterized by high demand for the resources, particularly for water. Polish food industrial plants consumed 793 hm(3) of water in 2014. Dairy branch had a combined 35% share of the above consumption. As shown by the data obtained from the Polish Central Statistical Office, the majority of dairy plants use its own source of water, so this branch is also important water producer in Poland. Water used for dairy industry should meet the requirements of at least drinking water quality, so the factories need to treat the water...
November 3, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29095351/young-child-formula-a-position-paper-by-the-espghan-committee-on-nutrition
#19
Iva Hojsak, Jiri Bronsky, Cristina Campoy, Magnus Domellöf, Nicholas Embleton, Nataša Fidler Mis, Jessie Hulst, Flavia Indrio, Alexandre Lapillonne, Christian Molgaard, Rakesh Vora, Mary Fewtrell
Young child formulae (YCF) are milk-based drinks or plant protein-based formulae intended to partially satisfy the nutritional requirements of young children ages 1 to 3 years. Although widely available on the market, their composition is, however, not strictly regulated and health effects have not been systematically studied. Therefore, the European Society for Paediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN) Committee on Nutrition (CoN) performed a systematic review of the literature to review the composition of YCF and consider their role in the diet of young children...
October 31, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29091071/early-commissioning-results-for-spectroscopic-x-ray-nano-imaging-beamline-bl-7c-sxni-at-pls-ii
#20
Sangsul Lee, Ik Hwan Kwon, Jae Young Kim, Sung Sun Yang, Sechang Kang, Jun Lim
For spectral imaging of chemical distributions using X-ray absorption near-edge structure (XANES) spectra, a modified double-crystal monochromator, a focusing plane mirrors system and a newly developed fluorescence-type X-ray beam-position monitoring and feedback system have been implemented. This major hardware upgrade provides a sufficiently stable X-ray source during energy scanning of more than hundreds of eV for acquisition of reliable XANES spectra in two-dimensional and three-dimensional images. In recent pilot studies discussed in this paper, heavy-metal uptake by plant roots in vivo and iron's phase distribution in the lithium-iron-phosphate cathode of a lithium-ion battery have been imaged...
November 1, 2017: Journal of Synchrotron Radiation
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