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https://www.readbyqxmd.com/read/27918629/new-routes-for-plant-iron-mining
#1
REVIEW
Catherine Curie, Stéphane Mari
I. II. III. IV. References SUMMARY: Plant iron (Fe) uptake relies to a large extent on the capacity of cells to control and extract Fe pools safely conserved in extracytoplasmic environments such as the apoplast and vacuoles, at least as much as on the transport machinery nested in plasma membranes. Recent studies on root and embryo Fe nutrition support this assertion and show that the root Fe-deficiency response also includes the dynamic use of a large Fe reservoir bound to cell wall components in the root apoplast, secretion in the apoplast of phenolic compounds of the coumarin family, which solubilize Fe in calcareous soils, and inhibition of suberization of endodermal cells in order to allow apoplastic and transcellular radial transport of Fe...
December 5, 2016: New Phytologist
https://www.readbyqxmd.com/read/27917913/synergistically-strengthened-3d-micro-scavenger-cage-adsorbent-for-selective-removal-of-radioactive-cesium
#2
Sung-Chan Jang, Sung-Min Kang, Yuvaraj Haldorai, Krishnan Giribabu, Go-Woon Lee, Young-Chul Lee, Moon Seop Hyun, Young-Kyu Han, Changhyun Roh, Yun Suk Huh
A novel microporous three-dimensional pomegranate-like micro-scavenger cage (P-MSC) composite has been synthesized by immobilization of iron phyllosilicates clay onto a Prussian blue (PB)/alginate matrix and tested for the removal of radioactive cesium from aqueous solution. Experimental results show that the adsorption capacity increases with increasing the inactive cesium concentration from 1 ppm to 30 ppm, which may be attributed to greater number of adsorption sites and further increase in the inactive cesium concentration has no effect...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27916492/comparative-impacts-of-iron-oxide-nanoparticles-and-ferric-ions-on-the-growth-of-citrus-maxima
#3
Jing Hu, Huiyuan Guo, Junli Li, Qiuliang Gan, Yunqiang Wang, Baoshan Xing
The impacts of iron oxide nanoparticles (γ-Fe2O3 NPs) and ferric ions (Fe(3+)) on plant growth and molecular responses associated with the transformation and transport of Fe(2+) were poorly understood. This study comprehensively compared and evaluated the physiological and molecular changes of Citrus maxima plants as affected by different levels of γ-Fe2O3 NPs and Fe(3+). We found that γ-Fe2O3 NPs could enter plant roots but no translocation from roots to shoots was observed. 20 mg/L γ-Fe2O3 NPs had no impact on plant growth...
December 1, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27916328/-the-plant-growth-promoting-rhizobacterium-arthrobacter-agilis-umcv2-endophytically-colonizes-medicago-truncatula
#4
Maria Elizabeth Aviles-Garcia, Idolina Flores-Cortez, Christian Hernández-Soberano, Gustavo Santoyo, Eduardo Valencia-Cantero
Arthrobacter agilis UMCV2 is a rhizosphere bacterium that promotes legume growth by solubilization of iron, which is supplied to the plant. A second growth promotion mechanism produces volatile compounds that stimulate iron uptake activities. Additionally, A. agilis UMCV2 is capable of inhibiting the growth of phytopathogens. A combination of quantitative polymerase chain reaction and fluorescence in situ hybridization techniques were used here to detect and quantify the presence of the bacterium in the internal tissues of the legume Medicago truncatula...
December 1, 2016: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/27911781/structure-and-mechanism-of-nov1-a-resveratrol-cleaving-dioxygenase
#5
Ryan P McAndrew, Noppadon Sathitsuksanoh, Michael M Mbughuni, Richard A Heins, Jose H Pereira, Anthe George, Kenneth L Sale, Brian G Fox, Blake A Simmons, Paul D Adams
Stilbenes are diphenyl ethene compounds produced naturally in a wide variety of plant species and some bacteria. Stilbenes are also derived from lignin during kraft pulping. Stilbene cleavage oxygenases (SCOs) cleave the central double bond of stilbenes, forming two phenolic aldehydes. Here, we report the structure of an SCO. The X-ray structure of NOV1 from Novosphingobium aromaticivorans was determined in complex with its substrate resveratrol (1.89 Å), its product vanillin (1.75 Å), and without any bound ligand (1...
November 30, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27905924/current-knowledge-and-perspectives-of-paenibacillus-a-review
#6
REVIEW
Elliot Nicholas Grady, Jacqueline MacDonald, Linda Liu, Alex Richman, Ze-Chun Yuan
Isolated from a wide range of sources, the genus Paenibacillus comprises bacterial species relevant to humans, animals, plants, and the environment. Many Paenibacillus species can promote crop growth directly via biological nitrogen fixation, phosphate solubilization, production of the phytohormone indole-3-acetic acid (IAA), and release of siderophores that enable iron acquisition. They can also offer protection against insect herbivores and phytopathogens, including bacteria, fungi, nematodes, and viruses...
December 1, 2016: Microbial Cell Factories
https://www.readbyqxmd.com/read/27902780/co-regulation-of-iron-metabolism-and-virulence-associated-functions-by-iron-and-xibr-a-novel-iron-binding-transcription-factor-in-the-plant-pathogen-xanthomonas
#7
Sheo Shankar Pandey, Pradeep Kumar Patnana, Santosh Kumar Lomada, Archana Tomar, Subhadeep Chatterjee
Abilities of bacterial pathogens to adapt to the iron limitation present in hosts is critical to their virulence. Bacterial pathogens have evolved diverse strategies to coordinately regulate iron metabolism and virulence associated functions to maintain iron homeostasis in response to changing iron availability in the environment. In many bacteria the ferric uptake regulator (Fur) functions as transcription factor that utilize ferrous form of iron as cofactor to regulate transcription of iron metabolism and many cellular functions...
November 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27893862/diversity-and-evolutionary-analysis-of-iron-containing-type-iii-alcohol-dehydrogenases-in-eukaryotes
#8
Carlos Gaona-López, Adriana Julián-Sánchez, Héctor Riveros-Rosas
BACKGROUND: Alcohol dehydrogenase (ADH) activity is widely distributed in the three domains of life. Currently, there are three non-homologous NAD(P)+-dependent ADH families reported: Type I ADH comprises Zn-dependent ADHs; type II ADH comprises short-chain ADHs described first in Drosophila; and, type III ADH comprises iron-containing ADHs (FeADHs). These three families arose independently throughout evolution and possess different structures and mechanisms of reaction. While types I and II ADHs have been extensively studied, analyses about the evolution and diversity of (type III) FeADHs have not been published yet...
2016: PloS One
https://www.readbyqxmd.com/read/27893798/diversity-and-impacts-of-mining-on-the-non-volant-small-mammal-communities-of-two-vegetation-types-in-the-brazilian-amazon
#9
Natália Carneiro Ardente, Átilla Colombo Ferreguetti, Donald Gettinger, Pricila Leal, Ana Cristina Mendes-Oliveira, Fernanda Martins-Hatano, Helena Godoy Bergallo
The Carajás National Forest contains some of the largest iron ore deposits in the world. The majority of the minerals are found below a plant community known as Savana Metalófila, or "Canga", which represents only 3% of the landscape within the Carajás National Forest (CNF). The aim of our study was to understand the diversity of community of non-volant small mammals in the two predominant vegetation types: Ombrophilous Forest and Canga, and to examine how mining impacts these communities. Sampling was conducted from January 2010 to August 2011 in 11 sampling sites divided by the total area of Canga and 12 sampling sites in the forest, totalizing 23 sites...
2016: PloS One
https://www.readbyqxmd.com/read/27891139/regulation-of-phytosiderophore-release-and-antioxidant-defense-in-roots-driven-by-shoot-based-auxin-signaling-confers-tolerance-to-excess-iron-in-wheat
#10
Ahmad H Kabir, Most A Khatun, Mohammad M Hossain, Syed A Haider, Mohammad F Alam, Nishit K Paul
Iron (Fe) is essential but harmful for plants at toxic level. However, how wheat plants tolerate excess Fe remains vague. This study aims at elucidating the mechanisms underlying tolerance to excess Fe in wheat. Higher Fe concentration caused morpho-physiological retardation in BR 26 (sensitive) but not in BR 27 (tolerant). Phytosiderophore and 2-deoxymugineic acid showed no changes in BR 27 but significantly increased in BR 26 due to excess Fe. Further, expression of TaSAMS. TaDMAS1, and TaYSL15 significantly downregulated in BR 27 roots, while these were upregulated in BR 26 under excess Fe...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27889440/non-heat-shock-responsive-roles-of-hsf1-in-candida-albicans-are-essential-under-iron-deprivation-and-drug-defense
#11
Remya Nair, Mohd Shariq, Sanjiveeni Dhamgaye, Chinmay K Mukhopadhyay, Shamim Shaikh, Rajendra Prasad
Recently, we have reported that the conditional mutant of the heat shock factor-1 (HSF1) in Candida albicans displays enhanced susceptibility not only towards a plant alkaloid, berberine, but also to diverse antifungal drugs. The present study attempts to identify additional phenotypes highlighting the non-heat shock responsive roles of HSF1 that could be correlated with the enhanced drug susceptibility. We uncover an intricate relationship between cellular iron and HSF1 mediated drug susceptibility of C. albicans...
November 24, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27887831/long-term-cu-stabilization-and-biomass-yields-of-giant-reed-and-poplar-after-adding-a-biochar-alone-or-with-iron-grit-into-a-contaminated-soil-from-a-wood-preservation-site
#12
Nadège Oustriere, Lilian Marchand, Nathalie Lottier, Mikael Motelica, Michel Mench
A 2-year pot experiment was carried out to examine the aging effect of biochar (B), alone or combined with iron grit (Z), on Cu stabilization and plant growth in a contaminated soil (964mg Cu kg(-1)) from a wood preservation site. The experiment consisted in 3 soil treatments, either planted with Arundo donax L. (Ad) or Populus nigra L. (Pn): (1) untreated Cu-contaminated soil (Ad, Pn); (2) Unt+1% (w/w) B (AdB, PnB), and (3) Unt+1% B+1% Z (AdBZ, PnBZ). After 22months, the soil pore water (SPW) was sampled and roots and shoots were harvested...
November 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27886462/loss-of-ppr3-ppr4-ppr6-or-ppr10-perturbs-iron-homeostasis-and-leads-to-apoptotic-cell-death-in-schizosaccharomyces-pombe
#13
Yang Su, Yanmei Yang, Ying Huang
Pentatricopeptide repeat (PPR) proteins characterized by tandem arrays of a degenerate 35-amino-acid repeat belong to a large family of RNA-binding proteins that are involved in posttranscriptional control of organelle gene expression. PPR proteins are ubiquitous in eukaryotes, and particularly prevalent in higher plants. Schizosaccharomyces pombe has ten PPR proteins. Among them, ppr3, ppr4, ppr6 and ppr10 participate in mitochondrial posttranscriptional processes and are required for mitochondrial electron transport chain (ETC) function...
November 25, 2016: FEBS Journal
https://www.readbyqxmd.com/read/27881725/tata-box-insertion-provide-a-selected-mechanism-for-enhancing-gene-expression-to-adapt-fe-deficiency
#14
Meiling Zhang, Yuanda Lv, Yi Wang, Jocelyn K C Rose, Fei Shen, Zhenyun Han, Xinzhong Zhang, Xuefeng Xu, Ting Wu, Zhenhai Han
Intraspecific genetic variation is essential for plant responses and adaption to evolutionary challenges, such as changing environmental conditions. The development the Earth's aerobic atmosphere has increased the iron (Fe) demand of organisms and Fe deficiency has become a limiting environmental factor for plant growth. We demonstrate here that the adaptation of apple trees to Fe deficiency is achieved by the modification of the promoter of the Iron-Regulated Transporter1 (IRT1) gene. Specifically, an IRT1 mutant allele with a TATA-box insertion in the promoter upstream of the IRT1 coding region enhances IRT1 expression...
November 23, 2016: Plant Physiology
https://www.readbyqxmd.com/read/27880062/the-effect-of-vegetarian-diets-on-iron-status-in-adults-a-systematic-review-and-meta-analysis
#15
Lisa M Haider, Lukas Schwingshackl, Georg Hoffmann, Cem Ekmekcioglu
Background Vegetarian diets exclude meat, seafood, and products containing these foods. Although the vegetarian lifestyle could lead to a better health status in adults, it may also bear risks for certain nutritional deficiencies. Cross-sectional studies and narrative reviews have shown that the iron status of vegetarians is compromised by the absence of highly bioavailable haem-iron in meatless diets and the inhibiting effect of certain components present in plant foods on non-haem iron bioavailability. Methods The databases Pubmed, Scopus, Embase, and Cochrane Central Register of Controlled Trials were searched for studies comparing serum ferritin, as the major laboratory parameter for iron status of adult vegetarians with non-vegetarian control groups...
November 23, 2016: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/27871749/the-effects-of-metallic-engineered-nanoparticles-upon-plant-systems-an-analytic-examination-of-scientific-evidence
#16
Thabet Tolaymat, Ash Genaidy, Wael Abdelraheem, Dionysios Dionysiou, Christian Andersen
Recent evidence for the effects of metallic engineered nanoparticles (ENPs) on plants and plant systems was examined together with its implications for other constituents of the Society-Environment-Economy (SEE) system. In this study, we were particularly interested to determine whether or not metallic ENPs have both stimulatory and inhibitory effects upon plant performance. An emphasis was made to analyze the scientific evidence on investigations examining both types of effects in the same studies. Analysis of evidence demonstrated that metallic ENPs have both stimulatory and inhibitory effects mostly in well-controlled environments and soilless media...
November 18, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27870602/influence-of-so2-related-interactions-on-pm2-5-formation-in-iron-ore-sintering
#17
Zhiyun Ji, Xiaohui Fan, Min Gan, Xuling Chen, Wei Lv, Qiang Li, Yang Zhou, Ye Tian, Tao Jiang
The formation of PM2.5 (aerosol particulate matters less than 2.5 µm in aerodynamic diameter) in association with SO2 emission during sintering process has been studied by dividing the whole sintering process into 6 typical sampling stages. A low-pressure cascade impactor was used to collect PM2.5 by automatically segregating particulates into 6 sizes. It was found that strong correlation was existed between the emission properties of PM2.5 and SO2. Wet mixture layer (over-wetted layer and raw mixture layer) had the function to simultaneously capture SO2 and PM2...
November 21, 2016: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/27868444/-plant-based-diets-a-review
#18
Zoltán Szabó, Attila Erdélyi, Andrea Gubicskóné Kisbenedek, Tamás Ungár, Éva Lászlóné Polyák, Szilvia Szekeresné Szabó, Réka Erika Kovács, László Bence Raposa, Mária Figler
Plant-based diet is an old-new trend in nutrition. In this review based on a historical context, we wish to introduce this popular nutritional trend. Our aim is to present plant-based diet as a primary measure for prevention. We intend to critically analyse some past stereotypes related to plant-based diet - whose main components include fruits, vegetables, whole grains, legumes, nuts and seeds - according to the literature (e.g. protein, vitamin B12, folic acid, and iron intake) by doing so we wish to create an adequate conceptual basis for its interpretation...
November 2016: Orvosi Hetilap
https://www.readbyqxmd.com/read/27864852/h-pyrophosphatase-ibvp1-promotes-efficient-iron-use-in-sweet-potato-ipomoea-batatas-l-lam
#19
Weijuan Fan, Hongxia Wang, Yinliang Wu, Nan Yang, Jun Yang, Peng Zhang
Iron (Fe) deficiency is one of the most common micronutrient deficiencies limiting crop production globally, especially in arid regions because of decreased availability of iron in alkaline soils. Sweet potato [Ipomoea batatas (L.) Lam.] grows well in arid regions and is tolerant to Fe deficiency. Here we report that the transcription of type I H(+) -pyrophosphatase (H(+) -PPase) gene IbVP1 in sweet potato plants was strongly induced by Fe deficiency and auxin in hydroponics, improving Fe acquisition via increased rhizosphere acidification and auxin regulation...
November 18, 2016: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/27858136/pongamia-pinnata-inoculated-with-bradyrhizobium-liaoningense-pzhk1-shows-potential-for-phytoremediation-of-mine-tailings
#20
Xiumei Yu, Yangxin Li, Yanmei Li, Chaohua Xu, Yongliang Cui, Quanju Xiang, Yunfu Gu, Ke Zhao, Xiaoping Zhang, Petri Penttinen, Qiang Chen
Mine tailings contain high concentrations of metal contaminants and only little nutrients, making the tailings barren for decades after the mining has been terminated. Effective phytoremediation of mine tailings calls for deep-rooted, metal accumulating, and soil fertility increasing plants with tolerance against harsh environmental conditions. We assessed the potential of the biofuel leguminous tree Pongamia pinnata inoculated with plant growth promoting rhizobia to remediate iron-vanadium-titanium oxide (V-Ti magnetite) mine tailing soil by pot experiment and in situ remediation test...
November 17, 2016: Applied Microbiology and Biotechnology
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