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https://www.readbyqxmd.com/read/29336033/h2-o2-mediates-nitrate-induced-iron-chlorosis-by-regulating-iron-homeostasis-in-rice
#1
Haifei Chen, Quan Zhang, Hongmei Cai, Wei Zhou, Fangsen Xu
The uptake of nitrate by plant roots causes a pH increment in rhizosphere and leads to iron (Fe) deficiency in rice. However, little is known about the mechanism how the nitrate uptake-induced high rhizosphere pH causes Fe deficiency. Here, we found that rice showed severe leaf chlorosis and large amounts of Fe plaque were aggregated on the root surface and intercellular space outside the exodermis in a form of ferrihydrite under alkaline conditions. In this case, there was significantly decreased Fe concentration in shoots and the Fe deficiency responsive genes were strongly induced in the roots...
January 16, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29334718/-diet-and-nutrition-interventions-prevent-gestational-diabetes-mellitus
#2
Z Y Yang
Gestational diabetes mellitus (GDM) is one of the most common complications during pregnancy, with rising trend over the years. Dietary nutrient intake (protein, fat and fatty acids, carbohydrate, vitamin D, vitamin E, iron, zinc, selenium and inositol et al.), dietary pattern and probiotics may be related to GDM occurrence. Dietary factors are modifiable factors for preventing GDM. The study reviewed the roles of these dietary factors in preventing GDM. Results showed that plant-based dietary pattern may lower the risk of GDM and dietary pattern characterized with high animal protein, high fat and low carbohydrate may increase the risk of GDM...
January 6, 2018: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/29331934/characterization-and-release-profile-of-mn-al-bearing-deposits-in-drinking-water-distribution-systems
#3
Guiwei Li, Yuanxun Ding, Hongfu Xu, Junwei Jin, Baoyou Shi
Inorganic contaminants accumulation in drinking water distribution systems (DWDS) is a great threat to water quality and safety. This work assessed the main risk factors for different water pipes and discovered the release profile of accumulated materials in a full scale distribution system frequently suffered from water discoloration problem. Physicochemical characterization of pipe deposits were performed using X-ray fluorescence, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy...
January 9, 2018: Chemosphere
https://www.readbyqxmd.com/read/29330821/effects-of-ferrous-sulfate-amendment-and-water-management-on-rice-growth-and-metal-loid-accumulation-in-arsenic-and-lead-co-contaminated-soil
#4
Lina Zou, Shu Zhang, Dechao Duan, Xinqiang Liang, Jiyan Shi, Jianming Xu, Xianjin Tang
Arsenic (As) and lead (Pb) commonly co-exist with high concentrations in paddy soil mainly due to human activities in south of China. This study investigates the effect of ferrous sulfate (FeSO4) amendment and water management on rice growth and arsenic (As) and lead (Pb) accumulation in rice plants. A paddy soil co-contaminated with As and Pb was chosen for the pot experiment with three FeSO4 levels (0, 0.25, and 1%, on a dry weight basis) and two water managements (flooded, non-flooded). The concentrations of As and Pb in iron plaques and rice plants were determined...
January 12, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29330694/volatile-compounds-from-beneficial-or-pathogenic-bacteria-differentially-regulate-root-exudation-transcription-of-iron-transporters-and-defense-signaling-pathways-in-sorghum-bicolor
#5
Erasto Hernández-Calderón, Maria Elizabeth Aviles-Garcia, Diana Yazmín Castulo-Rubio, Lourdes Macías-Rodríguez, Vicente Montejano Ramírez, Gustavo Santoyo, José López-Bucio, Eduardo Valencia-Cantero
Our results show that Sorghum bicolor is able to recognize bacteria through its volatile compounds and differentially respond to beneficial or pathogens via eliciting nutritional or defense adaptive traits. Plants establish beneficial, harmful, or neutral relationships with bacteria. Plant growth promoting rhizobacteria (PGPR) emit volatile compounds (VCs), which may act as molecular cues influencing plant development, nutrition, and/or defense. In this study, we compared the effects of VCs produced by bacteria with different lifestyles, including Arthrobacter agilis UMCV2, Bacillus methylotrophicus M4-96, Sinorhizobium meliloti 1021, the plant pathogen Pseudomonas aeruginosa PAO1, and the commensal rhizobacterium Bacillus sp...
January 12, 2018: Plant Molecular Biology
https://www.readbyqxmd.com/read/29328635/adsorption-and-molecular-fractionation-of-dissolved-organic-matter-on-iron-bearing-mineral-matrices-of-varying-crystallinity
#6
Elizabeth K Coward, Tsutomu Ohno, Alain F Plante
Iron (Fe)-bearing mineral phases contribute disproportionately to adsorption of soil organic matter (SOM), due to their elevated chemical reactivity and specific surface area (SSA). However, the spectrum of Fe solid-phase speciation present in oxidation-reduction-active soils challenges analysis of SOM-mineral interactions and may induce differential molecular fractionation of dissolved organic matter (DOM). This work used paired selective dissolution experiments and batch sorption of post-extraction residues to 1) quantify the contributions of Fe-bearing minerals of varying crystallinity to DOM sorption, and 2) characterize molecular fractionation using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)...
January 12, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29326007/direct-recovery-of-boiler-residue-by-combustion-synthesis
#7
Homan Nourbaghaee, Ahmad Ghaderi Hamidi, Mahdi Pourabdoli
Boiler residue (BR) of thermal power plants is one of the important secondary sources for vanadium production. In this research, the aluminothermic self-propagating high-temperature synthesis (SHS) was used for recovering the transition metals of BR for the first time. The effects of extra aluminum as reducing agent and flux to aluminum ratio (CaO/Al) were studied and the efficiency of recovery and presence of impurities were measured. Aluminothermic reduction of vanadium and other metals was carried out successfully by SHS without any foreign heat source...
January 8, 2018: Waste Management
https://www.readbyqxmd.com/read/29323436/molecular-characterization-and-gene-silencing-of-laccase-1-in-the-grain-aphid-sitobion-avenae
#8
Yong Zhang, Jia Fan, Frédéric Francis, Julian Chen
Laccase 1 (Lac1), a polyphenol oxidase, has been proposed to be involved in insect iron metabolism and immunity responses. However, little information is available on the roles of Lac 1 in insect-plant interactions. The grain aphid Sitobion avenae is one of the most destructive pests of cereal, directly drawing phloem sap and transmitting viruses. In the present study, we first cloned the open reading frame (ORF) of Lac 1 from S. avenae, and the putative protein sequence was predicted to have a carboxyl-terminal transmembrane domain...
January 11, 2018: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29322084/data-on-a-delivery-of-biomolecules-into-nicothiana-benthamiana-leaves-using-different-nanoparticles
#9
Antonida V Makhotenko, Ekaterina A Snigir, Natalia O Kalinina, Valentin V Makarov, Michael E Taliansky
Nanoparticles (NPs) have a number of unique properties associated with their ultrasmall size and exhibit many advantages compared with existing plant biotechnology platforms for delivery of proteins, RNA and DNA of various sizes into the plant cells (Arruda et al., 2015; Silva et al., 2010; Martin-Ortigosa et al., 2014; Mitter et al., 2017) [1], [2], [3], [4]. The data presented in this article demonstrate a delivery of biomolecules into Nicotiana benthamiana plant leaves using various types of NPs including gold, iron oxide and chitosan NPs and methods of biolistic bombardment and infiltration...
February 2018: Data in Brief
https://www.readbyqxmd.com/read/29321692/geobacteraceae-are-important-members-of-mercury-methylating-microbial-communities-of-sediments-impacted-by-waste-water-releases
#10
Andrea G Bravo, Jakob Zopfi, Moritz Buck, Jingying Xu, Stefan Bertilsson, Jeffra K Schaefer, John Poté, Claudia Cosio
Microbial mercury (Hg) methylation in sediments can result in bioaccumulation of the neurotoxin methylmercury (MMHg) in aquatic food webs. Recently, the discovery of the gene hgcA, required for Hg methylation, revealed that the diversity of Hg methylators is much broader than previously thought. However, little is known about the identity of Hg-methylating microbial organisms and the environmental factors controlling their activity and distribution in lakes. Here, we combined high-throughput sequencing of 16S rRNA and hgcA genes with the chemical characterization of sediments impacted by a waste water treatment plant that releases significant amounts of organic matter and iron...
January 10, 2018: ISME Journal
https://www.readbyqxmd.com/read/29319418/aluminum-and-iron-leaching-from-power-plant-coal-fly-ash-for-preparation-of-polymeric-aluminum-ferric-chloride
#11
Yadong Zhang, Ming Li, Dong Liu, Xulian Hou, Jinglun Zou, Xiaotong Ma, Fanyi Shang, Zhaowen Wang
In this work, aluminum and iron existing in coal fly ash were extracted by method of hydrochloric acid leaching. Effects of solid-liquid ratio, reaction temperature, reaction time, acid concentration, and raw ash mesh on recovery efficiencies of Al2O3 and Fe2O3 were investigated. XRD analysis indicated that anhydrite, hematite, mullite and quartz were the dominant minerals in the raw fly ash sample. XRF technique was applied to determine the mass fractions of chemical components in the raw ash and leached residues, while the concentrations of Al2O3 and Fe2O3 in leaching solutions were measured by titration method...
January 10, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29306155/interaction-mechanisms-between-%C3%AE-fe2o3-%C3%AE-fe2o3-and-fe3o4-nanoparticles-and-citrus-maxima-seedlings
#12
Junli Li, Jing Hu, Lian Xiao, Yunqiang Wang, Xilong Wang
The interactions between α-Fe2O3, γ-Fe2O3, and Fe3O4 nanoparticles (NPs) and Citrus maxima seedlings were examined so as to better understand possible particle applications as an Fe source for crop plants. NPs toxicity to the exposed plant was investigated as well. The α- and γ-Fe2O3 NPs were accumulated by plant root cells through diapirism and endocytosis, respectively, but translocation to the shoots was negligible. Analysis of malondialdehyde (MDA), soluble protein content, and antioxidant enzyme activity revealed that Fe deficiency induced strong oxidative stress in Citrus maxima seedlings, which followed an order of Fe deficiency>Fe3+>α-Fe2O3, γ-Fe2O3 NPs>Fe3O4 NPs...
January 3, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29306143/arsenic-adsorption-and-plant-availability-in-an-agricultural-soil-irrigated-with-as-rich-water-effects-of-fe-rich-amendments-and-organic-and-inorganic-fertilisers
#13
Elena Arco-Lázaro, Tania Pardo, Rafael Clemente, Ma Pilar Bernal
The use of As-rich water for irrigation in agricultural soils may result in As accumulation in soil and crops, with the consequent risk of its entry into the food chain. The effectiveness of three different Fe-based materials (a commercial iron oxide (Bayoxide®), lamination slag (a by-product of the hot rolling of steel) and a commercial red mud derivative (ViroBind™)) used as soil amendments to minimise the impact of irrigation with As-rich water in an agricultural soil-plant system was evaluated in a pot experiment...
January 3, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29306091/remediation-of-incomplete-nitrification-and-capacity-increase-of-biofilters-at-different-drinking-water-treatment-plants-through-copper-dosing
#14
Florian B Wagner, Peter Borch Nielsen, Rasmus Boe-Hansen, Hans-Jørgen Albrechtsen
Drinking water treatment plants based on groundwater may suffer from incomplete ammonium removal, which deteriorates drinking water quality and constrains water utilities in the operation of their plants. Ammonium is normally removed through nitrification in biological granular media filters, and recent studies have demonstrated that dosing of copper can stimulate the removal of ammonium. Here, we investigated if copper dosing could generically improve ammonium removal of biofilters, at treatment plants with different characteristics...
December 27, 2017: Water Research
https://www.readbyqxmd.com/read/29305420/in-vitro-reconstitution-functional-dissection-and-mutational-analysis-of-metal-ion-transport-by-mitoferrin-1
#15
Eric T Christenson, Austin S Gallegos, Anirban Banerjee
Iron is universally important to cellular metabolism and mitoferrins-1 and -2 have been proposed to be the iron importers of mitochondria, the cell's assembly plant of heme and iron-sulfur clusters. These iron-containing prosthetic groups are critical for a host of physiological processes ranging from oxygen transport and energy consumption to maintaining protein structural integrity. Mitoferrin-1 (Mfrn1) belongs to the mitochondrial carrier (MC) family and is atypical given its putative metallic cargo; most MCs transport nucleotides, amino acids, or other small to medium-size metabolites...
January 5, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29304382/transcriptional-regulation-of-chickpea-ferritin-cafer1-influences-its-role-in-iron-homeostasis-and-stress-response
#16
Shaista Parveen, Aarti Pandey, Neha Jameel, Subhra Chakraborty, Niranjan Chakraborty
Ferritin, ubiquitous among all living organisms except yeast, exhibits iron-regulated expression. In plants, this regulation is applied through transcriptional control. Previous studies established the presence of two types of cis-acting elements in the promoter region: the iron regulatory element (FRE) in soybean and the iron-dependent regulatory sequence (IDRS) in maize and Arabidopsis. Adverse environmental conditions (e.g. water-deficit and oxidative stress) are known to modulate the expression of phytoferritin genes...
December 27, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29304231/buffered-delivery-of-phosphate-to-arabidopsis-alters-responses-to-low-phosphate
#17
Meredith T Hanlon, Swayamjit Ray, Patompong Saengwilai, Dawn Luthe, Jonathan P Lynch, Kathleen M Brown
Arabidopsis has been reported to respond to phosphate (Pi) stress by arresting primary root growth and increasing lateral root branching. We developed a system to buffer Pi availability to Arabidopsis in gel media systems by charging activated aluminum oxide particles with low and sufficient concentrations of Pi, based on previous work in horticultural and sand culture systems. This system more closely mimics soil chemistry and results in different growth and transcriptional responses to Pi stress compared with plants grown in standard gel media...
January 3, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29301078/molecular-chemodiversity-of-dissolved-organic-matter-in-paddy-soils
#18
Xiaoming Li, Guo-Xin Sun, Songcan Chen, Zhi Fang, Hai-Yan Yuan, Quan Shi, Yong-Guan Zhu
Organic matter (OM), and dissolved organic matter (DOM), have a major influence upon biogeochemical processes; most significantly, the carbon cycle. To date, very few studies have examined the spatial heterogeneity of DOM in paddy soils. Thus, very little is known about the DOM molecular profiles and the key environmental factors that underpin DOM molecular chemodiversity in paddy soils. Here, Fourier-Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) was applied to unambiguously resolve 11,361 molecular formulae in 16 paddy soils; thereby elucidating the molecular characteristics of paddy soil DOM...
January 4, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29298909/evolution-of-the-spx-gene-family-in-plants-and-its-role-in-the-response-mechanism-to-phosphorus-stress
#19
REVIEW
Na Liu, Wenyan Shang, Chuang Li, Lihua Jia, Xin Wang, Guozhen Xing, WenMing Zheng
Molecular and genomic studies have shown the presence of a large number of SPX gene family members in plants, some of which have been proved to act in P signalling and homeostasis. In this study, the molecular and evolutionary characteristics of the SPX gene family in plants were comprehensively analysed, and the mechanisms underlying the function of SPX genes in P signalling and homeostasis in the model plant species Arabidopsis (Arabidopsis thaliana) and rice (Oryza sativa), and in important crops, including wheat (Triticum aestivum), soya beans (Glycine max) and rapeseed (Brassica napus), were described...
January 2018: Open Biology
https://www.readbyqxmd.com/read/29291230/identification-of-host-cellular-targets-of-ac4-and-av2-proteins-of-tomato-leaf-curl-palampur-virus-and-their-sub-cellular-localization-studies
#20
Poonam Roshan, Aditya Kulshreshtha, Vipin Hallan
Tomato leaf curl palampur virus (ToLCPalV) is a bipartite begomovirus with genome organization typical of old world begomoviruses. It infects commercially important crops and weeds in the Asian subcontinent. Apart from other proteins, the DNA-A of the virus encodes AV2 and AC4 proteins of approximately 13.73 and 6.7 kDa, respectively. In case of other begomoviruses, previous studies have shown the role of AV2 and AC4 proteins in virus movement, pathogenesis and suppression of gene silencing. However, the ToLCPalV proteins are significantly variable in comparison to closest relative and hence there is a need to work out their functions...
December 2017: Virusdisease
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