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Iron plant

Jiangshan Ma, Keke Zhang, Mei Huang, Stanton B Hector, Bin Liu, Chunyi Tong, Qian Liu, Jiarui Zeng, Yan Gao, Ting Xu, Ying Liu, Xuanming Liu, Yonghua Zhu
BACKGROUND: Lignocellulolytic bacteria have revealed to be a promising source for biofuel production, yet the underlying mechanisms are still worth exploring. Our previous study inferred that the highly efficient lignocellulose degradation by bacterium Pantoea ananatis Sd-1 might involve Fenton chemistry (Fe(2+) + H2O2 + H(+) → Fe(3+) + OH· + H2O), similar to that of white-rot and brown-rot fungi. The aim of this work is to investigate the existence of this Fenton-based oxidation mechanism in the rice straw degradation process of P...
2016: Biotechnology for Biofuels
Charlotte A Jørgensen, Henning S Jensen, Sara Egemose
Measures such as stormwater ponds, constructed wetlands and buffer strips along streams are used to reduce diffuse phosphorus (P) loading to surface waters. These systems often retain particulate P well, whereas retention of dissolved P is less efficient and might require addition of P adsorbents. In this study, we screened waterwork ochre sludge (WWS) originating from groundwater treatment and ochre sludge from ochre precipitation basins along streams for their applicability as P adsorbents at ambient P concentrations...
October 19, 2016: Environmental Technology
Daniel M Ayine-Tora, Robert Kingsford-Adaboh, William A Asomaning, Jerry J E K Harrison, Felix C Mills-Robertson, Yahaya Bukari, Patrick O Sakyi, Sylvester Kaminta, Jóhannes Reynisson
Fungal pathogens continue to pose challenges to humans and plants despite efforts to control them. Two coumarins, robustic acid and thonningine-C isolated from Millettia thonningii, show promising activity against the fungus Candida albicans with minimum fungicidal concentration of 1.0 and 0.5 mg/mL, respectively. Molecular modelling against the putative bio-molecular target, lanosterol 14α-demethylase (CYP51), revealed a plausible binding mode for the active compounds, in which the hydroxyl group binds with a methionine backbone carboxylic group blocking access to the iron catalytic site...
October 15, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
He Wang, Yongfeng Jia
The bioavailability of heavy metals strongly depends on their speciation in the environment. Adsorption (ADS) and coprecipitation (CPT) on amorphous metal hydroxides are important processes, controlling the fates of heavy metals in an aqueous environment. This work studied the bioavailability of Cu, Cd, Ni, and Pb adsorbed on and/or coprecipitated with amorphous iron and iron/aluminum mixed hydroxides to the wetland plant Phragmites australis. After a 13-day treatment, there was an apparent uptake of the heavy metals by the plant, and the amount of metal bioaccumulation was measurably different for different association forms (ADS vs...
October 18, 2016: Environmental Science and Pollution Research International
Daria Chrobok, Simon R Law, Bastiaan Brouwer, Pernilla Lindén, Agnieszka Ziolkowska, Daniela Liebsch, Reena Narsai, Bozena Szal, Thomas Moritz, Nicolas Rouhier, James Whelan, Per Gardestrom, Olivier Keech
The functions of mitochondria during leaf senescence, a type of programmed cell death aiming at the massive retrieval of nutrients from the senescing organ to the rest of the plant, remain elusive. Here, combining experimental and analytical approaches, we showed that mitochondrial integrity is conserved until the latest stages of leaf senescence, while their number drops by 30%. Adenylate phosphorylation state assays and mitochondrial respiratory measurements indicated that the leaf energy status is also maintained during this time period...
October 15, 2016: Plant Physiology
Trey K Sato, Mary Tremaine, Lucas S Parreiras, Alexander S Hebert, Kevin S Myers, Alan J Higbee, Maria Sardi, Sean J McIlwain, Irene M Ong, Rebecca J Breuer, Ragothaman Avanasi Narasimhan, Mick A McGee, Quinn Dickinson, Alex La Reau, Dan Xie, Mingyuan Tian, Jennifer L Reed, Yaoping Zhang, Joshua J Coon, Chris Todd Hittinger, Audrey P Gasch, Robert Landick
The inability of native Saccharomyces cerevisiae to convert xylose from plant biomass into biofuels remains a major challenge for the production of renewable bioenergy. Despite extensive knowledge of the regulatory networks controlling carbon metabolism in yeast, little is known about how to reprogram S. cerevisiae to ferment xylose at rates comparable to glucose. Here we combined genome sequencing, proteomic profiling, and metabolomic analyses to identify and characterize the responsible mutations in a series of evolved strains capable of metabolizing xylose aerobically or anaerobically...
October 2016: PLoS Genetics
Tripti Mishra, N B Singh, Nandita Singh
Disposal of red mud (RM) poses serious environmental problems such as wind erosion, air and water pollution. To overcome these problems, effective restoration of the disposal land through naturally growing vegetation is a sustainable and economical approach. Present study involved estimation of frequency (F), density (D), abundance (Ab) and important value index (IVI) of natural flora on abandoned RM sites in order to assess their metal toxicity tolerance capacity. Based on visual observations and highest IVI, Sonchus asper and Sesbania punicea were identified as an effective ecological tool for the restoration of barren RM sites...
October 14, 2016: International Journal of Phytoremediation
Gianpiero Vigani, Dario Di Silvestre, Anna Maria Agresta, Silvia Donnini, Pierluigi Mauri, Christian Gehl, Florian Bittner, Irene Murgia
Molybdenum (Mo) and iron (Fe) are essential micronutrients required for crucial enzyme activities in plant metabolism. Here we investigated the existence of a mutual control of Mo and Fe homeostasis in cucumber (Cucumis sativus). Plants were grown under single or combined Mo and Fe starvation. Physiological parameters were measured, the ionomes of tissues and the ionomes and proteomes of root mitochondria were profiled, and the activities of molybdo-enzymes and the synthesis of molybdenum cofactor (Moco) were evaluated...
October 13, 2016: New Phytologist
Amanda M V Brown, Sulochana K Wasala, Dana K Howe, Amy B Peetz, Inga A Zasada, Dee R Denver
Wolbachia, one of the most widespread endosymbionts, is a target for biological control of mosquito-borne diseases (malaria and dengue virus), and antibiotic elimination of infectious filarial nematodes. We sequenced and analyzed the genome of a new Wolbachia strain (wPpe) in the plant-parasitic nematode Pratylenchus penetrans. Phylogenomic analyses placed wPpe as the earliest diverging Wolbachia, suggesting two evolutionary invasions into nematodes. The next branches comprised strains in sap-feeding insects, suggesting Wolbachia may have first evolved as a nutritional mutualist...
October 13, 2016: Scientific Reports
Laura T Moreno-Moyano, Julien P Bonneau, José T Sánchez-Palacios, Joseph Tohme, Alexander A T Johnson
Biofortification of rice (Oryza sativa L.) with micronutrients is widely recognized as a sustainable strategy to alleviate human iron (Fe) and zinc (Zn) deficiencies in developing countries where rice is the staple food. Constitutive overexpression of the rice nicotianamine synthase (OsNAS) genes has been successfully implemented to increase Fe and Zn concentrations in unpolished and polished rice grain. Intensive research is now needed to couple this high-micronutrient trait with high grain yields. We investigated associations of increased grain Fe and Zn concentrations with agro-morphological traits of backcross twice second filial (BC2F2) transgenic progeny carrying OsNAS1 or OsNAS2 overexpression constructs under indica/japonica and japonica/japonica genetic backgrounds...
2016: Frontiers in Plant Science
Daniel Załuski, Helena D Smolarz
The chemical composition and pharmacological activity of E. senticosus cultivated in Poland were investigated. Studies included the assay of TPC and TFC, 2D-TLC identification of phenolic acids, HPTLC-detection of antioxidants, and antioxidative, antileukemic, anti-MMPs properties of E. senticosus. The ethanolic extracts from the roots, spring leaves, fruits, and the chloroform extract from the roots were tested. The richest in polyphenols are the fresh fruits (57.5 mg/g), while in flavonoids the spring leaves (27...
September 2016: Pakistan Journal of Pharmaceutical Sciences
Soumitra Paul, Dipak Gayen, Swapan K Datta, Karabi Datta
The present study highlights the molecular regulation of iron transport in soyFER1-overexpressing transgenic rice. Accumulation of iron in three different seed developmental stages, milk, dough, and mature, has been examined. The transgenic seeds of the milk stage showed significant augmentation of iron and zinc levels compared with wild-type seeds, and similar results were observed throughout the dough and mature stages. To investigate the regulation of iron transport, the role of miRNAs was studied in roots of transgenic rice...
October 2016: Journal of Experimental Botany
Ilaria Forieri, Carsten Sticht, Michael Reichelt, Norbert Gretz, Malcolm J Hawkesford, Mario Malagoli, Markus Wirtz, Ruediger Hell
Deprivation of mineral nutrients causes significant retardation of plant growth. This retardation is associated with nutrient specific and general stress-induced transcriptional responses. In this study we adjusted the external supply of iron, potassium and sulfur to cause the same retardation of shoot growth. Nevertheless, limitation by individual nutrients resulted in specific morphological adaptations and distinct shifts within the root metabolite fingerprint. The metabolic shifts affected key metabolites of primary metabolism and the stress-related phytohormones, jasmonic-, salicylic- and abscisic acid...
October 10, 2016: Plant, Cell & Environment
Jaiprakash, Amrita Singhai, Gazala Habib, Ramya Sunder Raman, Tarun Gupta
Fine aerosol fraction (particulate matter with aerodynamic diameter <= 1.0 μm (PM)1.0) over the Indian Institute of Technology Delhi campus was monitored day and night (10 h each) at 30 m height from November 2009 to March 2010. The samples were analyzed for 5 ions (NH4(+), NO3(-), SO4(2-), F(-), and Cl(-)) and 12 trace elements (Na, K, Mg, Ca, Pb, Zn, Fe, Mn, Cu, Cd, Cr, and Ni). Importantly, secondary aerosol (sulfate and nitrate) formation was observed during dense foggy events, supporting the fog-smog-fog cycle...
October 10, 2016: Environmental Science and Pollution Research International
M Arshadi, M K Abdolmaleki, F Mousavinia, S Foroughifard, A Karimzadeh
This paper reports the preparation and stabilization of nano zero valent iron (NZVI) on a modified aquatic plant, Azolla filiculoides, and investigates its potential for the adsorption/reduction of Pb(II) and Hg(II) ions from aqueous media even after six months of storage in the lab condition. XRD, TEM and zeta potential results demonstrated that the Azolla-NaOH could be a good stabilizer of aged NZVI (six months) and the green support suppressed the oxidation and aggregation of immobilized NZVI. Kinetic and equilibrium models for lead and mercury ions uptake were developed by considering the effect of the initial Pb(II) and Hg(II) concentrations, contact time, adsorbent dosage, initial pH and effect of temperature...
October 4, 2016: Journal of Colloid and Interface Science
Simrat Pal Singh, Beat Keller, Wilhelm Gruissem, Navreet K Bhullar
Iron and zinc deficiencies negatively impact human health worldwide. We developed wheat lines that meet or exceed recommended dietary target levels for iron and zinc in the grains. These lines represent useful germplasm for breeding new wheat varieties that can reduce iron and zinc deficiency-associated health burdens in the affected populations. Micronutrient deficiencies, including iron and zinc deficiencies, have negative impacts on human health globally. Iron-deficiency; anemia affects nearly two billion people worldwide and is the cause of reduced cognitive development, fatigue and overall low productivity...
October 8, 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Hans-Jörg Mai, Stéphanie Pateyron, Petra Bauer
BACKGROUND: FIT (FER-LIKE IRON DEFICIENCY-INDUCED TRANSCRIPTION FACTOR) is the central regulator of iron uptake in Arabidopsis thaliana roots. We performed transcriptome analyses of six day-old seedlings and roots of six week-old plants using wild type, a fit knock-out mutant and a FIT over-expression line grown under iron-sufficient or iron-deficient conditions. We compared genes regulated in a FIT-dependent manner depending on the developmental stage of the plants. We assembled a high likelihood dataset which we used to perform co-expression and functional analysis of the most stably iron deficiency-induced genes...
October 3, 2016: BMC Plant Biology
Yue Cao, Hao Ai, Ajay Jain, Xueneng Wu, Liang Zhang, Wenxia Pei, Aiqun Chen, Guohua Xu, Shubin Sun
BACKGROUND: Phosphorus (P), an essential macronutrient, is often limiting in soils and affects plant growth and development. In Arabidopsis thaliana, Low Phosphate Root1 (LPR1) and its close paralog LPR2 encode multicopper oxidases (MCOs). They regulate meristem responses of root system to phosphate (Pi) deficiency. However, the roles of LPR gene family in rice (Oryza sativa) in maintaining Pi homeostasis have not been elucidated as yet. RESULTS: Here, the identification and expression analysis for the homologs of LPR1/2 in rice were carried out...
October 3, 2016: BMC Plant Biology
Jingcheng Xu, Gang Zhao, Xiangfeng Huang, Haobo Guo, Wei Liu
According to the characteristics of the reverse osmosis concentrate (ROC) generated from Iron and Steel Company, we used three sets of parallel horizontal subsurface flow (HSF) constructed wetlands with different plants and substrate layouts to treat the high salinty wastewater. The plant growth and removal efficiencies under saline condition were evaluated. The evaluation was based entirely on routinely-collected water quality data, physical and chemical characteristics of the plants (Phragmites australis, Typha latifolia, Iris wilsonii, and Scirpus planiculmis)...
August 11, 2016: International Journal of Phytoremediation
J Garnier, J-M Garnier, C L Vieira, A Akerman, J Chmeleff, R I Ruiz, F Poitrasson
The iron isotope composition was used to investigate dissimilatory iron reduction (DIR) processes in an iron-rich waterlogged paddy soil, the iron uptake strategies of plants and its translocation in the different parts of the rice plant along its growth. Fe concentration and isotope composition (δ(56)Fe) in irrigation water, precipitates from irrigation water, soil, pore water solution at different depths under the surface water, iron plaque on rice roots, rice roots, stems, leaves and grains were measured...
September 30, 2016: Science of the Total Environment
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