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https://www.readbyqxmd.com/read/29045801/plant-growth-promoting-rhizobacteria-bacillus-subtilis-rr4-isolated-from-rice-rhizosphere-induces-malic-acid-biosynthesis-in-rice-roots
#1
Kandaswamy Rekha, Baburaj Baskar, Santhanam Srinath, Balasundaram Usha
Malic acid, one of the major organic acid exudates from roots, plays a significant role in the chemotaxis of beneficial bacteria to the plant's rhizosphere. In this study, the effect of a plant growth promoting rhizobacterium, Bacillus subtilis RR4, on the synthesis and exudation of malic acid (MA) from roots is demonstrated in rice. To test the chemotactic ability of RR4 towards MA, capillary chemotaxis assay was performed which revealed a positive response (relative chemotactic ratio of 6.15 with 10 µM MA) and with increasing concentrations of MA, an elevated chemotactic response was observed...
October 18, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/29038478/herbivores-increase-the-global-availability-of-nutrients-over-millions-of-years
#2
Christopher E Doughty
Can the presence of herbivores increase global nutrient availability? Animals disperse vital nutrients through ecosystems, increasing the spatial availability of these nutrients. Large herbivores are especially important for the dispersal of vital nutrients due to their long food passage times and day ranges, and large herbivores from past periods (the Pleistocene) may have increased nutrient concentrations on the continental scale. However, such results have been demonstrated theoretically but not yet empirically...
October 16, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28994596/16s-rrna-gene-amplicon-sequencing-reveals-significant-changes-in-microbial-compositions-during-cyanobacteria-laden-drinking-water-sludge-storage
#3
Haiyan Pei, Hangzhou Xu, Jingjing Wang, Yan Jin, Hongdi Xiao, Chunxia Ma, Jiongming Sun, Hongmin Li
This is the first study to systematically investigate the microbial community structure in cyanobacteria-laden drinking water sludge generated by different types of coagulants (including AlCl3, FeCl3, and polymeric aluminum ferric chloride (PAFC)) using Illumina 16S rRNA gene MiSeq sequencing. Results show that Cyanobacteria, Proteobacteria, Firmicutes, Bacteroidetes, Verrucomicrobia, and Planctomycetes were the most dominant phyla in sludge, and because of the toxicity of high Al and Fe level in AlCl3 and FeCl3 sludges, respectively, the PAFC sludge exhibited greater microbial richness than that in AlCl3 and FeCl3 sludges...
October 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28968214/effect-of-microbial-inoculation-in-combating-the-aluminium-toxicity-effect-on-growth-of-zea-mays
#4
P Arora, G Singh, A Tiwari
The present study is aimed at improving the aluminium tolerance in maize crop employing the potential of microbial inoculants in conferring resistance to these toxicities via production of certain chelating compounds like siderophores, exopolysachharides and organic acids. Acid soils have now-a-days become one of the key factors for limiting growth of many agriculturally important crops. Aluminium  is one of the major elements present in acid soils and is mainly responsible for toxicity in the soil. This aluminium is rapidly soluble in soil water and hence absorbed by plant roots under conditions where soil pH is below 5...
July 31, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28957760/comprehensive-evaluation-of-three-sets-of-advanced-wastewater-treatment-trains-for-treating-secondary-effluent-organic-micro-pollutants-and-bio-toxicity
#5
Zhiqiang Chen, Mo Li, Qinxue Wen
The environmental presence of organic micro-pollutants (OMPs) has posed increasing risks on aquatic organism and human health. The performance of three commonly used advanced wastewater treatment trains, coagulation-sand filter, coagulation-biological aerated filter (BAF) and ozonation-biological activated carbon (BAC), in removing fifteen residual contaminants and bio-toxicity of the effluent from a local municipal wastewater treatment plant (WWTP) were investigated. Relatively high level of OMPs (0.69-14...
September 20, 2017: Chemosphere
https://www.readbyqxmd.com/read/28874508/aba-induced-stomatal-closure-involves-almt4-a-phosphorylation-dependent-vacuolar-anion-channel-of-arabidopsis
#6
Cornelia Eisenach, Ulrike Baetz, Nicola V Huck, Jingbo Zhang, Alexis De Angeli, Gerold Beckers, Enrico Martinoia
Stomatal pores are formed between a pair of guard cells, and allow plant uptake of CO2 and water evaporation. Their aperture depends on changes in osmolyte concentration of guard cell vacuoles, specifically of K+ and Mal2-. Efflux of Mal2- from the vacuole is required for stomatal closure; however, it is not clear how the anion is released. Here we report the identification of ALMT4 (ALUMINIUM ACTIVATED MALATE TRANSPORTER 4) as an Arabidopsis thaliana ion channel that can mediate Mal2- release from the vacuole and is required for stomatal closure in response to abscisic acid (ABA)...
September 5, 2017: Plant Cell
https://www.readbyqxmd.com/read/28828287/concurrent-production-and-relative-quantification-of-vasicinone-from-in-vivo-and-in-vitro-plant-parts-of-malabar-nut-adhatoda-vasica-nees
#7
Jitendriya Panigrahi, Saikat Gantait, Illa C Patel
The present study documents a simultaneous production and comparative assessment of extracted vasicinone from in vivo (leaves and stems) and in vitro (leaves, stems and calli) plant parts of Adhatoda vasica Nees, a well-known medicinal plant. High-performance thin layer chromatography (HPTLC) analysis of the above-mentioned plant parts, collected at their 60-day-old growth stage, was performed via methanolic extraction and with the aid of toluene:butanol:butyl acetate (9:0.5:0.5; v/v/v) solvent system. The method was validated with the help of aluminium sheet precoated with silica gel 60 F254 TLC plates, following the ICH guidelines in order to maintain accuracy, precision and repeatability...
October 2017: 3 Biotech
https://www.readbyqxmd.com/read/28818756/interactions-between-aluminium-iron-and-silicon-in-cucumber-sativus-l-grown-under-acidic-conditions
#8
Nikolai P Bityutskii, Kirill L Yakkonen, Anastasiya I Petrova, Alexey L Shavarda
Aluminium (Al) is one of the major stressors for plants in acidic soils, negatively affecting plant growth and nutrient balances. Significant efforts have been undertaken to understand mechanisms of Al tolerance in plants. However, little is known of the relevance of iron (Fe) and silicon (Si) nutrition under Al stress conditions. The objectives of this study were to determine whether effects induced by Fe and Si are of importance for limitation of Al moving via xylem in plants (Cucumis sativus L.). Cucumber plants (cv...
August 4, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28772864/ecotoxicity-of-concretes-with-granulated-slag-from-gray-iron-pilot-production-as-filler
#9
Helena Hybská, Emília Hroncová, Juraj Ladomerský, Karol Balco, Jozef Mitterpach
This paper focuses on research concerning the ecotoxicological properties of granulated slag from the pilot production of gray iron with red mud addition and concrete composites with the application of this slag. Red mud is a hazardous waste generated in the production of aluminium oxide. Negative ecotoxicological tests are, therefore, one of the basic prerequisites for the ability to use granulated slag from gray iron pilot production. Granulated slag and concrete composite samples with various ratios of granulated slag have been subject to ecotoxicity tests: determining root growth inhibition in the highly-cultivated plant Sinapisalba, and determining acute toxicity in Daphniamagna...
May 6, 2017: Materials
https://www.readbyqxmd.com/read/28745369/chlorogenic-acid-protects-against-aluminium-induced-cytotoxicity-through-chelation-and-antioxidant-actions-in-primary-hippocampal-neuronal-cells
#10
Xiaomei Wang, Xinguang Fan, Shuzhi Yuan, Wenxiao Jiao, Bangdi Liu, Jiankang Cao, Weibo Jiang
Chlorogenic acid (CGA), a major polyphenolic component of many plants, displays antioxidant and neuroprotective properties in neurodegenerative diseases. To investigate whether CGA may influence aluminium (Al) induced cytotoxicity, aluminium chloride (50 μM Al) was administered in primary hippocampal neuronal cells presupplemented with CGA (10, 50 and 100 μM). Our study shows that the exposure to Al caused cell death, Al(3+) accumulation, reactive oxygen species generation and mitochondrial damage in cells...
August 1, 2017: Food & Function
https://www.readbyqxmd.com/read/28699117/determination-of-total-mercury-in-aluminium-industrial-zones-and-soil-contaminated-with-red-mud
#11
Oqil Rasulov, Andrea Zacharová, Marián Schwarz
This study investigated total mercury contents in areas impacted by aluminium plants in Tajikistan and Slovakia and in one area flooded with red mud in Hungary. We present the first determination of total mercury contents in the near-top soil (0-10 and 10-20 cm) in Tajikistan and the first comparative investigation of Tajikistan-Slovakia-Hungary. The Tajik Aluminium Company (TALCO) is one of the leading producers of primary aluminium in Central Asia. In the past 30 years, the plant has been producing large volumes of industrial waste, resulting in negative impacts on soil, groundwater and air quality of the surrounding region...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28668601/application-of-high-temperature-phase-change-materials-for-improved-efficiency-in-waste-to-energy-plants
#12
Fabio Dal Magro, Haoxin Xu, Gioacchino Nardin, Alessandro Romagnoli
This study reports the thermal analysis of a novel thermal energy storage based on high temperature phase change material (PCM) used to improve efficiency in waste-to-energy plants. Current waste-to-energy plants efficiency is limited by the steam generation cycle which is carried out with boilers composed by water-walls (i.e. radiant evaporators), evaporators, economizers and superheaters. Although being well established, this technology is subjected to limitations related with high temperature corrosion and fluctuation in steam production due to the non-homogenous composition of solid waste; this leads to increased maintenance costs and limited plants availability and electrical efficiency...
June 28, 2017: Waste Management
https://www.readbyqxmd.com/read/28611497/stress-tolerant-viridibacillus-arenosi-strain-ihb-b-7171-from-tea-rhizosphere-as-a-potential-broad-spectrum-microbial-inoculant
#13
Rishu Thakur, K C Sharma, Ashu Gulati, R K Sud, Arvind Gulati
Viridibacillus arenosi strain IHB B 7171 identified based on 16S rRNA gene sequence produced colony forming units (cfu/ml) ranging from 3.3 × 10(4) to 1.2 × 10(10) under pH 5-11, 2.2 × 10(2) to 1.4 × 10(10) for temperature 5-40 °C, 2.4 × 10(2) to 1.1 × 10(10) for PEG 6000 10-30%, 2.2 × 10(2) to 1.4 × 10(10) for 2.5-10% NaCl, 3.1 × 10(3) to 1.7 × 10(9) for 2.5-7.5 mM CaCl2, 2.2 × 10(2) to 1.4 × 10(7) for 2.5-7.5 mM AlCl3, and 3.2 × 10(2) to 1.2 × 10(7) for 2.5-7...
June 2017: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/28602286/studying-radiolytic-ageing-of-nuclear-power-plant-electric-cables-with-ftir-spectroscopy
#14
A Levet, J Colombani, L Duponchel
Due to the willingness to extend the nuclear power plants length of life, it is of prime importance to understand long term ageing effect on all constitutive materials. For this purpose gamma-irradiation effects on insulation of instrumentation and control cables are studied. Mid-infrared spectroscopy and principal components analysis (PCA) were used to highlight molecular modifications induced by gamma-irradiation under oxidizing conditions. In order to be closer to real world conditions, a low dose rate of 11Gyh(-1) was used to irradiate insulations in full cable or alone with a dose up to 58 kGy...
September 1, 2017: Talanta
https://www.readbyqxmd.com/read/28576325/distinct-physiological-and-molecular-responses-in-arabidopsis-thaliana-exposed-to-aluminum-oxide-nanoparticles-and-ionic-aluminum
#15
Yujian Jin, Xiaoji Fan, Xingxing Li, Zhenyan Zhang, Liwei Sun, Zhengwei Fu, Michel Lavoie, Xiangliang Pan, Haifeng Qian
Nano-aluminium oxide (nAl2O3) is one of the most widely used nanomaterials. However, nAl2O3 toxicity mechanisms and potential beneficial effects on terrestrial plant physiology remain poorly understood. Such knowledge is essential for the development of robust nAl2O3 risk assessment. In this study, we studied the influence of a 10-d exposure to a total selected concentration of 98 μM nAl2O3 or to the equivalent molar concentration of ionic Al (AlCl3) (196 μM) on the model plant Arabidopsis thaliana on the physiology (e...
September 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28539100/production-of-thermal-insulation-blocks-from-bottom-ash-of-fluidized-bed-combustion-system
#16
A K Mandal, O P Sinha
The issues of disposal and environmental problems are increased by the generation of bottom ash from the thermal power plants day by day; hence, its recycling is required. The present study aimed to make thermal insulation blocks using as raw material bottom ash and iron ore slime as a binder and to characterize their engineering properties. Two different fineness values of bottom ash were considered with varying amounts of iron ore slime (0-10%) to make the blocks. Blocks were dried followed by firing at 1000, 1100 and 1200°C, respectively...
May 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28527763/aluminium-resistant-plant-growth-promoting-bacteria-induce-overexpression-of-aluminium-stress-related-genes-in-arabidopsis-thaliana-and-increase-the-ginseng-tolerance-against-aluminium-stress
#17
Mohamed El-Agamy Farh, Yeon-Ju Kim, Johan Sukweenadhi, Priyanka Singh, Deok-Chun Yang
Panax ginseng is an important cash crop in the Asian countries due to its pharmaceutical effects, however the plant is exposed to various abiotic stresses, lead to reduction of its quality. One of them is the Aluminum (Al) accumulation. Plant growth promoting bacteria which able to tolerate heavy metals has been considered as a new trend for supporting the growth of many crops in heavy metal occupied areas. In this study, twelve bacteria strains were isolated from rhizosphere of diseased Korean ginseng roots located in Gochang province, Republic of Korea and tested for their ability to grow in Al-embedded broth media...
July 2017: Microbiological Research
https://www.readbyqxmd.com/read/28458216/pcdd-f-and-dioxin-like-pcb-minimization-a-13-year-experimental-study-along-the-flue-gas-cleaning-system-of-a-secondary-aluminium-refining-plant
#18
Elena Collina, Michele Bortolami, Francesco Franzoni, Marina Lasagni, Elsa Piccinelli, Demetrio Pitea
A 13-years study shows that a careful design of the flue gas cleaning system of a full scale secondary aluminium refining plant results in a minimized and very stable emission of Polychlorinated Dibenzo-p-Dioxins (PCDD), Polychlorinated Dibenzo Furans (PCDF) and dioxin-like Polychlorinated Biphenyls (PCB). The value of equivalent toxicity of PCDD/F in the emission was definitely of an order of magnitude less than the regulation limit. In the initial flue gas cleaning system, the PCB mean fingerprint after the slow cooling of the flue gas was typical of de novo synthesis...
August 2017: Chemosphere
https://www.readbyqxmd.com/read/28451437/an-assessment-of-agricultural-pesticide-use-in-iran-2012-2014
#19
Zaim Morteza, Seyed Behzad Mousavi, Mohammad Ali Baghestani, Antero Aitio
BACKGROUND: This is the first published assessment on agricultural pesticide use in Iran with the aim to identify pesticide products with a potential of causing acute or chronic hazard to human health. It also establishes a baseline for future comparisons and for trend assessments. METHODS: The amounts of imported technical materials for formulation by local manufacturers as well as imported final product formulations were extracted from the registration data of the Plant Protection Organization of Iran in 2012-2014...
2017: Journal of Environmental Health Science & Engineering
https://www.readbyqxmd.com/read/28402316/effect-of-anaerobic-digestion-and-liming-on-plant-availability-of-phosphorus-in-iron-and-aluminium-precipitated-sewage-sludge-from-primary-wastewater-treatment-plants
#20
Emilio Alvarenga, Anne Falk Øgaard, Lasse Vråle
More efficient plant utilisation of the phosphorus (P) in sewage sludge is required because rock phosphate is a limited resource. To meet environmental legislation thresholds for P removal from wastewater (WW), primary treatment with iron (Fe) or aluminium (Al) coagulants is effective. There is also a growing trend for WW treatment plants (WWTPs) to be coupled to a biogas process, in order to co-generate energy. The sludge produced, when stabilised, is used as a soil amendment in many countries. This study examined the effects of anaerobic digestion (AD), with or without liming as a post-treatment, on P release from Fe- and Al-precipitated sludges originating from primary WWTPs...
April 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
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