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https://www.readbyqxmd.com/read/27912180/radicals-formed-from-proton-loss-of-carotenoid-radical-cations-a-special-form-of-carotenoid-neutral-radical-occurring-in-photoprotection
#1
A Ligia Focsan, Lowell D Kispert
In an organized assembly in Arabidopsis thaliana plant, proton loss from the radical cation of zeaxanthin (Zea(+)) was found to occur under intense illumination, a possible component in photoprotection. A stable neutral radical is formed because of the favorable proton loss at C4(4') position(s) of the terminal ends of Zea(+) that extends the unpaired spin density distribution (notation Zea(4) or Zea(4') by symmetry). Proton loss from the radical cation of β-carotene (β-car(+)) to available proton acceptors was also detected in a PSII sample upon irradiation...
November 19, 2016: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/27889087/characterisation-of-the-phenanthrene-degradation-related-genes-and-degrading-ability-of-a-newly-isolated-copper-tolerant-bacterium
#2
Mengke Song, Ying Yang, Longfei Jiang, Qing Hong, Dayi Zhang, Zhenguo Shen, Hua Yin, Chunling Luo
A copper-tolerant phenanthrene (PHE)-degrading bacterium, strain Sphingobium sp. PHE-1, was newly isolated from the activated sludge in a wastewater treatment plant. Two key genes, ahdA1b-1 encoding polycyclic aromatic hydrocarbon ring-hydroxylating dioxygenase (PAH-RHDɑ) and xyLE encoding catechol-2,3-dioxygenase (C23O), involved in the PHE metabolism by strain PHE-1 were identified. The PAH-RHD gene cluster showed 96% identity with the same cluster of Sphingomonas sp. P2. Our results indicated the induced transcription of xylE and ahdA1b-1 genes by PHE, simultaneously promoted by Cu(II)...
November 23, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27882491/influence-of-phosphorous-fertilization-on-copper-phytoextraction-and-antioxidant-defenses-in-castor-bean-ricinus-communis-l
#3
Guoyong Huang, Muhammad Shahid Rizwan, Chao Ren, Guangguang Guo, Qingling Fu, Jun Zhu, Hongqing Hu
Application of fertilizers to supply appropriate nutrients has become an essential agricultural strategy for enhancing the efficiency of phytoremediation in heavy metal contaminated soils. The present study was conducted to investigate the beneficial effects of three types of phosphate fertilizers (i.e., oxalic acid-activated phosphate rock (APR), Ca(H2PO4)2, and NaH2PO4) in the range of 0-600 mg P kg(-1) soil, on castor bean growth, antioxidants [antioxidative enzymes and glutathione (GSH)], and Cu uptake...
November 23, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27877177/comparative-transcriptomic-analyses-of-differentially-expressed-genes-in-transgenic-melatonin-biosynthesis-ovine-hiomt-gene-in-switchgrass
#4
Shan Yuan, Cong Guan, Sijia Liu, Yanhua Huang, Danyang Tian, Xin Cui, Yunwei Zhang, Fuyu Yang
Melatonin serves pleiotropic functions in prompting plant growth and resistance to various stresses. The accurate biosynthetic pathway of melatonin remains elusive in plant species, while the N-acetyltransferase and O-methyltransferase were considered to be the last two key enzymes during its biosynthesis. To investigate the biosynthesis and metabolic pathway of melatonin in plants, the RNA-seq profile of overexpression of the ovine HIOMT was analyzed and compared with the previous transcriptome of transgenic oAANAT gene in switchgrass, a model plant for cellulosic ethanol production...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27873109/bioavailability-and-health-risk-assessment-of-potentially-toxic-elements-in-thriasio-plain-near-athens-greece
#5
Vasileios Antoniadis, Evangelia E Golia, Sabry M Shaheen, Jörg Rinklebe
Elevated concentrations of potentially toxic elements (PTEs) are usually found in areas of intense industrial activity. Thriasio Plain is a plain near Athens, Greece, where most of the heavy industry of the country has been situated for decades, but it also is a residential and horticultural area. We aimed at measuring the levels of PTEs in soils and indigenous plant species and assessing the health risk associated with direct soil ingestion. Samples of soils at roadsides and growing plants were collected from 31 sites of that area...
November 21, 2016: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/27869502/influence-of-endophytic-bacillus-pumilus-and-edta-on-the-phytoextraction-of-cu-from-soil-by-using-cicer-arietinum
#6
Barkat Ali, Amna, Muhammad Tariq Javed, Hazrat Ali, Muhammad Farooq Hussain Munis, Hassan Javed Chaudhary
In developing countries, soil contamination with metals is ubiquitous, which poses a serious threat to the ecosystem. The current study was designed to screen out the nested belongings of Cicer arietinum plants and Bacillus pumilus (KF 875447) in extracting copper (Cu) from contaminated soils. A pot experiment was executed by growing C. arietinum seedlings either inoculated with B. pumilus or uninoculated along with the application of 5 mM ethylenediaminetetraacetic acid (EDTA). Plants were subjected to three different concentrations of Cu (250, 350, and 500 ppm) for 48 days...
January 2, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/27862834/transcriptional-response-of-erwinia-amylovora-upon-copper-shock-in-vivo-role-of-the-copa-gene
#7
Begoña Águila-Clares, Luisa F Castiblanco, José Manuel Quesada, Ramón Penyalver, Juan Carbonell, María M López, Ester Marco-Noales, George W Sundin
Fire blight is a devastating plant disease caused by the bacterium Erwinia amylovora and its control frequently is based on the use of copper-based compounds, for which the mechanisms of action are not well known. Consequently, here we investigate the response of E. amylovora to copper shock by a whole genome microarray approach. Transcriptional analyses showed that, in the presence of copper, 23 genes were increased in expression; these genes were classified mainly into the transport and stress functional categories...
November 14, 2016: Molecular Plant Pathology
https://www.readbyqxmd.com/read/27854061/metal-resistant-rhizobacteria-isolates-improve-mucuna-deeringiana-phytoextraction-capacity-in-multi-metal-contaminated-soils-from-a-gold-mining-area
#8
Cácio Luiz Boechat, Patricia Giovanella, Magno Batista Amorim, Enilson Luiz Saccol de Sá, Flávio Anastácio de Oliveira Camargo
Phytoremediation consists of biological techniques for heavy metal remediation, which include exploring the genetic package of vegetable species to remove heavy metals from the environment. The goals of this study were to investigate heavy metal and bioaugmentation effects on growth and nutrient uptake by Mucuna deeringiana; to determine the metal translocation factor and bioconcentration factor and provide insight for using native bacteria to enhance heavy metal accumulation. The experiment was conducted under greenhouse conditions using a 2 × 4 factorial scheme with highly and slightly contaminated soil samples and inoculating M...
November 16, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27853967/the-bioconcentration-ability-of-heavy-metal-research-for-50-kinds-of-rice-under-the-same-test-conditions
#9
Wen-Juan Xie, Lei Che, Guang-Yu Zhou, Li-Na Yang, Min-Yu Hu
The aims of this experiment are to explore the accumulation of metal contamination of different varieties of rice planted in paddy fields and to provide a basis for the further research. The rice specimens were grown in and collected from a total area of 8.24 acres of rice planting fields where local farmers cultivated 50 different kinds of rice. The crops were grown using the methods of seedling, transplanting, fertilizing, and irrigation, under the guidance of professional and technical personnel. The 50 kinds of paddy rice contain 20 kinds of conventional rice, 15 kinds of two-line hybrid rice, 15 kinds of three-line hybrid rice, and the whole experiment lasted 100 days...
December 2016: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27853966/remediation-of-cu-metal-induced-accelerated-fenton-reaction-by-potato-peels-bio-sorbent
#10
Rafia Azmat, Sumeira Moin, Ailyan Saleem
This article has allied exposure to Ecological Particulate Matter (EPM) and its remediation using potato peel surface (PPC) bio-sorbent on two important edible crops Spinacia oleracea and Luffa acutangula. Fenton reaction acceleration was one of the major stress oxidation reactions as a consequence of iron and copper toxicity, which involve in the formation of hydroxyl radical (OH) through EPM. Results showed that the oxidative stress encouraged by Cu in both species that recruits the degradation of photosynthetic pigments, initiating decline in growth, reduced leaf area and degrade proteins...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27848090/environmental-geochemistry-of-the-abandoned-mamut-copper-mine-sabah-malaysia
#11
Antony van der Ent, Mansour Edraki
The Mamut Copper Mine (MCM) located in Sabah (Malaysia) on Borneo Island was the only Cu-Au mine that operated in the country. During its operation (1975-1999), the mine produced 2.47 Mt of concentrate containing approximately 600,000 t of Cu, 45 t of Au and 294 t of Ag, and generated about 250 Mt of overburden and waste rocks and over 150 Mt of tailings, which were deposited at the 397 ha Lohan tailings storage facility, 15.8 km from the mine and 980 m lower in altitude. The MCM site presents challenges for environmental rehabilitation due to the presence of large volumes of sulphidic minerals wastes, the very high rainfall and the large volume of polluted mine pit water...
November 15, 2016: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/27837364/translocation-of-metal-ions-from-soil-to-tobacco-roots-and-their-concentration-in-the-plant-parts
#12
Cleber Pinto da Silva, Thiago E de Almeida, Rosimara Zittel, Tatiana R de Oliveira Stremel, Cinthia E Domingues, Januário Kordiak, Sandro Xavier de Campos
This paper presents a study on the translocation factors (TFs) and bioconcentration factors (BCFs) of copper (Cu), manganese (Mn), zinc (Zn), cobalt (Co), chromium (Cr), cadmium (Cd), lead (Pb), iron (Fe), nickel (Ni), and arsenic (As) ions in roots, stems, and leaves of tobacco. The results revealed that during the tobacco growth, the roots are able to increase the sensitiveness of the physiological control, reducing the translocation of the metals Ni (0.38) and Pb (0.48) to the leaves. Cd and Zn presented factors TF and BCF >1 in the three tissues under analysis, which indicates the high potential for transportation and accumulation of these metals in all plant tissues...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27833841/plant-growth-promotion-and-biofortification-of-chickpea-and-pigeonpea-through-inoculation-of-biocontrol-potential-bacteria-isolated-from-organic-soils
#13
Subramaniam Gopalakrishnan, Srinivas Vadlamudi, Srinivasan Samineni, C V Sameer Kumar
Seven strains of bacteria [Pseudomonas plecoglossicida SRI-156, Brevibacterium antiquum SRI-158, Bacillus altitudinis SRI-178, Enterobacter ludwigii SRI-211, E. ludwigii SRI-229, Acinetobacter tandoii SRI-305 and Pseudomonas monteilii SRI-360; demonstrated previously for control of charcoal rot disease in sorghum and plant growth-promotion (PGP) in rice] were evaluated for their PGP and biofortification traits in chickpea and pigeonpea under field conditions. When treated on seed, the seven selected bacteria significantly enhanced the shoot height and root length of both chickpea and pigeonpea over the un-inoculated control...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27833654/bioinformatic-characterization-of-type-specific-sequence-and-structural-features-in-auxiliary-activity-family-9-proteins
#14
Vuyani Moses, Rowan Hatherley, Özlem Tastan Bishop
BACKGROUND: Due to the impending depletion of fossil fuels, it has become important to identify alternative energy sources. The biofuel industry has proven to be a promising alternative. However, owing to the complex nature of plant biomass, hence the degradation, biofuel production remains a challenge. The copper-dependent Auxiliary Activity family 9 (AA9) proteins have been found to act synergistically with other cellulose-degrading enzymes resulting in an increased rate of cellulose breakdown...
2016: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/27823905/bioassessment-of-heavy-metals-in-the-surface-soil-layer-of-an-opencast-mine-aimed-for-its-rehabilitation
#15
Vlado Ličina, Milica Fotirić Akšić, Zorica Tomić, Ivana Trajković, Svetlana Antić Mladenović, Milena Marjanović, Jörg Rinklebe
The contemporary reclamation method in an opencast coal mine closure comprises the use of the preserved surface soil layer (SSL) before mining, and can be directly returned to the areas being rehabilitated. The present study emphasizes a risk in the use of such a SSL in mine rehabilitation due to the possible excessive amount of heavy metals which usually derives from a metal-rich sediment or fluvial character of overburden material. This indication was approved by the bioassessment of cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), lead (Pb), nickel (Ni), and zinc (Zn) in root and aerial parts of maize (Zea mays), alfalfa (Medicago sativa), sweet clover (Melilotus officinalis), wheat (Triticum aestivum), barley (Hordeum sativum), white clover (Trifolium repens), pasture (Poales sp...
November 4, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27822692/genetic-and-biochemical-characterization-of-rhizobacterial-strains-and-their-potential-use-in-combination-with-chelants-for-assisted-phytoremediation
#16
Cicatelli Angela, Guarino Francesco, Baldan Enrico, Castiglione Stefano
Copper and zinc are essential micronutrients in plants but, at high concentrations, they are toxic. Assisted phytoremediation is an emerging "green" technology that aims to improve the efficiency of tolerant species to remove metals from soils through the use of chelants or microorganisms. Rhizobacteria can promote plant growth and tolerance and also affect the mobility, bioavailability, and complexation of metals. A pot experiment was conducted to evaluate the phytoremediation effectiveness of sunflowers cultivated in a Cu- and Zn-spiked soil, in the presence or absence of bacterial consortium and/or chelants...
November 7, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27813568/gynophore-mirna-analysis-at-different-developmental-stages-in-arachis-duranensis
#17
Y Shen, Y H Liu, X J Zhang, Q Sha, Z D Chen
Peanut is one of the most important oilseed crops in the world that provides a significant amount of lipids and protein for many people. The gynophore plays an important role in gynophore development after fertilization of the peanut ovule. MicroRNAs (miRNAs) play an important role in numerous developmental and physiological plant processes. Therefore, it is essential to analyze the miRNA sequences at different gynophore stages to explore and validate gene function. Multiple small RNAs were sequenced and collected from gynophore stages A1, A2, and A3 (5, 10, and 20 days of development, respectively) for further prediction...
October 24, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27802305/structural-insights-into-the-nucleotide-binding-domains-of-the-p1b-type-atpases-hma6-and-hma8-from-arabidopsis-thaliana
#18
Hubert Mayerhofer, Emeline Sautron, Norbert Rolland, Patrice Catty, Daphné Seigneurin-Berny, Eva Pebay-Peyroula, Stéphanie Ravaud
Copper is a crucial ion in cells, but needs to be closely controlled due to its toxic potential and ability to catalyse the formation of radicals. In chloroplasts, an important step for the proper functioning of the photosynthetic electron transfer chain is the delivery of copper to plastocyanin in the thylakoid lumen. The main route for copper transport to the thylakoid lumen is driven by two PIB-type ATPases, Heavy Metal ATPase 6 (HMA6) and HMA8, located in the inner membrane of the chloroplast envelope and in the thylakoid membrane, respectively...
2016: PloS One
https://www.readbyqxmd.com/read/27799013/ecotoxicological-assessment-of-dewatered-drinking-water-treatment-residue-for-environmental-recycling
#19
Nannan Yuan, Changhui Wang, Laura A Wendling, Yuansheng Pei
Drinking water treatment residue (DWTR) is commonly regarded as a waste product of drinking water treatment plant, which is disposed to sewer or to landfill, with associated financial and environmental costs. Fortunately, the beneficial recycle of DWTR in environmental remediation has been demonstrated in many reports. However, the lack of information concerning the potential toxicity of dewatered DWTR hinders its widespread use in environmental applications. The present study examined the ecotoxicity of dewatered aluminum (Al) and iron (Fe) DWTR leachates to a green alga, Chlorella vulgaris, systematically...
October 31, 2016: Environmental Technology
https://www.readbyqxmd.com/read/27798802/geostatistical-interpolation-of-available-copper-in-orchard-soil-as-influenced-by-planting-duration
#20
Chuancheng Fu, Haibo Zhang, Chen Tu, Lianzhen Li, Yongming Luo
Mapping the spatial distribution of available copper (A-Cu) in orchard soils is important in agriculture and environmental management. However, data on the distribution of A-Cu in orchard soils is usually highly variable and severely skewed due to the continuous input of fungicides. In this study, ordinary kriging combined with planting duration (OK_PD) is proposed as a method for improving the interpolation of soil A-Cu. Four normal distribution transformation methods, namely, the Box-Cox, Johnson, rank order, and normal score methods, were utilized prior to interpolation...
October 31, 2016: Environmental Science and Pollution Research International
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