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phytoremediation

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https://www.readbyqxmd.com/read/28742846/endophytic-fungal-communities-of-polygonum-acuminatum-and-aeschynomene-fluminensis-are-influenced-by-soil-mercury-contamination
#1
William Pietro-Souza, Ivani Souza Mello, Suzana Junges Vendruscullo, Gilvan Ferreira da Silva, Cátia Nunes da Cunha, James Francis White, Marcos Antônio Soares
The endophytic fungal communities of Polygonum acuminatum and Aeschynomene fluminensis were examined with respect to soil mercury (Hg) contamination. Plants were collected in places with and without Hg+2 for isolation and identification of their endophytic root fungi. We evaluated frequency of colonization, number of isolates and richness, indices of diversity and similarity, functional traits (hydrolytic enzymes, siderophores, indoleacetic acid, antibiosis and metal tolerance) and growth promotion of Aeschynomene fluminensis inoculated with endophytic fungi on soil with mercury...
2017: PloS One
https://www.readbyqxmd.com/read/28737929/enhanced-degradation-of-tce-on-a-superfund-site-using-endophyte-assisted-poplar-tree-phytoremediation
#2
Sharon Lafferty Doty, John Leonard Freeman, Christopher M Cohu, Joel Gerard Burken, Andrea Firrincieli, Andrew Simon, Zareen Khan, Jud G Isebrands, Joseph Lukas, Michael J Blaylock
Trichloroethylene (TCE) is a widespread environmental pollutant common in groundwater plumes associated with industrial manufacturing areas. We had previously isolated and characterized a natural bacterial endophyte, Enterobacter sp. strain PDN3, of poplar trees, that rapidly metabolizes TCE, releasing chloride ion. We now report findings from a successful three-year field trial of endophyte-assisted phytoremediation on the Middlefield-Ellis-Whisman Superfund Study Area TCE plume in the Silicon Valley of California...
July 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28736087/sphingomonads-in-microbe-assisted-phytoremediation-tackling-soil-pollution
#3
REVIEW
Michael Gatheru Waigi, Kai Sun, Yanzheng Gao
Soil pollution has become a major concern in various terrestrial ecosystems worldwide. One in situ soil bioremediation strategy that has gained popularity recently is microbe-assisted phytoremediation, which is promising for remediating pollutants. Sphingomonads, a versatile bacteria group comprising four well-known genera, are ubiquitous in vegetation grown in contaminated soils. These Gram-negative microbes have been investigated for their ability to induce innate plant growth-promoting (PGP) traits, including the formation of phytohormones, siderophores, and chelators, in addition to their evolutionary adaptations enabling biodegradation and microbe-assisted removal of contaminants...
July 20, 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/28736051/leachate-pollution-index-as-an-effective-tool-in-determining-the-phytotoxicity-of-municipal-solid-waste-leachate
#4
V Arunbabu, K S Indu, E V Ramasamy
Phytoremediation is a promising option for the treatment of municipal solid waste leachate. Combining the leachate pollution index with the phytotoxicity data will be useful in predicting the suitable concentration of leachate for the phytoremediation applications. Understanding the tolerant mechanisms of plants to leachate stress will further help to select the appropriate dose. The aim of the study was to investigate the effect of different concentrations of leachate on germination, growth, chlorophyll content and antioxidant enzyme activities in the plant Vigna unguiculata...
July 20, 2017: Waste Management
https://www.readbyqxmd.com/read/28735243/interactions-between-pteris-vittata-l-genotypes-and-a-polycyclic-aromatic-hydrocarbon-pah-degrading-bacterium-alcaligenes-sp-in-arsenic-uptake-and-pah-dissipation
#5
Lu Sun, Ganghui Zhu, Xiaoyong Liao, Xiulan Yan
The effects of two Pteris vittata L. accessions and a polycyclic aromatic hydrocarbon (PAH)-degrading bacterium (Alcaligenes sp.) on arsenic (As) uptake and phenanthrene dissipation were studied. The Alcaligenes sp. survived in the rhizosphere and improved soil As bioavailability with co-exposure. However, bacterial inoculation altered Pteris vittata L. stress tolerance, and substantially affected the As distribution in the rhizosphere of the two P. vittata accessions. Bacterial inoculation was beneficial to protect the Guangxi accession against the toxic effects, and significantly increased plant As and phenanthrene removal ratios by 27...
July 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28735207/nutrient-balancing-for-phytoremediation-enhancement-of-urea-manufacturing-raw-wastewater
#6
Sara Yavari, Amirhossein Malakahmad, Nasiman B Sapari, Saba Yavari, Eakalak Khan
Application of urea manufacturing wastewater to teak (Tectona grandis) trees, a fast growing tropical timber plants, is an environmentally-friendly and cost-effective alternative for treatment of nitrogen-rich wastewater. However, the plant growth is strongly limited by lack of phosphorus (P) and potassium (K) elements when the plants are irrigated with wastewater containing high concentration of nitrogen (N). A greenhouse experiment was conducted to optimize the efficiency of teak-based remediation systems in terms of nutrient balance...
July 20, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28734213/enhanced-cadmium-phytoremediation-of-glycine-max-l-through-bioaugmentation-of-cadmium-resistant-bacteria-assisted-by-biostimulation
#7
Pongsarun Rojjanateeranaj, Chirawee Sangthong, Benjaphorn Prapagdee
This study examined the potential of three strains of cadmium-resistant bacteria, including Micrococcus sp., Pseudomonas sp. and Arthrobacter sp., to promote root elongation of Glycine max L. seedlings, soil cadmium solubility and cadmium phytoremediation in G. max L. planted in soil highly polluted with cadmium with and without nutrient biostimulation. Micrococcus sp. promoted root length in G. max L. seedlings under toxic cadmium conditions. Soil inoculation with Arthrobacter sp. increased the bioavailable fraction of soil cadmium, particularly in soil amended with a C:N ratio of 20:1...
July 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28720737/core-concept-phytoremediation-advances-in-the-lab-but-lags-in-the-field
#8
Carolyn Beans
No abstract text is available yet for this article.
July 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28717650/removal-of-cu-zn-pb-and-cr-from-yangtze-estuary-using-the-phragmites-australis-artificial-floating-wetlands
#9
Xiaofeng Huang, Feng Zhao, Gao Yu, Chao Song, Zhi Geng, Ping Zhuang
Contamination of heavy metals would threaten the water and soil resources; phytoremediation can be potentially used to remediate metal contaminated sites. We constructed the Phragmites australis artificial floating wetlands outside the Qingcaosha Reservoir in the Yangtze Estuary. Water characteristic variables were measured in situ by using YSI Professional Pro Meter. Four heavy metals (copper, zinc, lead, and chromium) in both water and plant tissues were determined. Four heavy metals in estuary water were as follows: 0...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28711820/integrated-metagenomics-and-molecular-ecological-network-analysis-of-bacterial-community-composition-during-the-phytoremediation-of-cadmium-contaminated-soils-by-bioenergy-crops
#10
Zhaojin Chen, Yuan Zheng, Chuanyu Ding, Xuemin Ren, Jian Yuan, Feng Sun, Yuying Li
Two energy crops (maize and soybean) were used in the remediation of cadmium-contaminated soils. These crops were used because they are fast growing, have a large biomass and are good sources for bioenergy production. The total accumulation of cadmium in maize and soybean plants was 393.01 and 263.24μg pot(-1), respectively. The rhizosphere bacterial community composition was studied by MiSeq sequencing. Phylogenetic analysis was performed using 16S rRNA gene sequences. The rhizosphere bacteria were divided into 33 major phylogenetic groups according to phyla...
July 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28709043/improvement-effects-of-cytokinin-on-edta-assisted-phytoremediation-and-the-associated-environmental-risks
#11
Jie Luo, Limei Cai, Shihua Qi, Jian Wu, X W Sophie Gu
Soil samples containing excess Cd (0.82 mg kg(-1)), Pb (92.7 mg kg(-1)) and Cu (72.7 mg kg(-1)) relative to their corresponding safe thresholds (0.3, 80 and 50 mg kg(-1), respectively) from a notorious e-waste disposing and recycling place in southern China were phytoremediated with EDTA addition to evaluate the promotion effects of cytokinin on the remediation efficiency of Eucalyptus globulus. Biomass production of the plant, evapotranspiration amount of the soil, metals accumulation in plant organs and the volume of leachate under various treatments were compared...
July 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28708985/ultrastructural-protein-and-photosynthetic-alterations-induced-by-pb-and-cd-in-cynara-cardunculus-l-and-its-potential-for-phytoremediation
#12
C Arena, F Figlioli, M C Sorrentino, L G Izzo, F Capozzi, S Giordano, V Spagnuolo
The effects of cadmium and lead were investigated in Cynara cardunculus L. Plant uptake by root and shoot, changes in cell ultrastructure and photosynthetic efficiency, photosynthetic key protein levels, as well as regulation of stress-induced Hsp70 were examined. Cynara cardunculus accumulated Cd and Pb in their tissue, with a different trend for the two metals. The prompt translocation of Cd to the shoot may justify the ultrastructural injuries, especially observed in chloroplasts. However, Cd- treated plants did not show any decline in photochemistry; it is likely that Cd in shoot tissue triggers defense mechanisms, increasing the level of proteins involved in photosynthesis (i...
July 11, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28704702/plant-architecture-auxin-homeostasis-and-phenol-content-in-arabidopsis-thaliana-grown-in-cadmium-and-zinc-enriched-media
#13
Adriano Sofo, Rocco Bochicchio, Mariana Amato, Nunzia Rendina, Antonella Vitti, Maria Nuzzaci, Maria Maddalena Altamura, Giuseppina Falasca, Federica Della Rovere, Antonio Scopa
A screening strategy using micropropagation glass tubes with a gradient of distances between germinating seeds and a metal-contaminated medium was used for studying alterations in root architecture and morphology of Arabidopsis thaliana treated with cadmium (Cd) and zinc (Zn) at the concentration of 10-20μM and 100-200μM, respectively. Metal concentrations in plant shoots and roots were measured by quadrupole inductively coupled plasma mass spectrometry. After 21days from germination, all plants in the tubes were scanned at high resolution and the root systems analyzed...
July 3, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28704693/investigation-of-arsenic-accumulation-and-biochemical-response-of-in-vitro-developed-vetiveria-zizanoides-plants
#14
Shraddha Singh, Suvarna Sounderajan, Kiran Kumar, D P Fulzele
Vetiver grass (Vetiveria zizanoides L. Nash) is found to be a suitable candidate for the phytoremediation of heavy metals. An investigation of arsenic (As) accumulation, translocation and tolerance was conducted in V. zizanoides plantlets upon exposure to different concentrations of arsenic (10, 50, 100 and 200µM) for 7 and 14 d. V. zizanoides plants were found effective in remediation of As, maximum being at 200µM after 14 d of exposure. The results of TBARS and photosynthetic pigments demonstrated that plants did not experience significant toxicity at all the concentrations of As after 7 days, however an increase in their level was found after 14 d...
July 10, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28702492/advanced-treatment-of-saline-municipal-wastewater-by-ruppia-maritima-a-data-set
#15
Mehdi Ahmadi, Hamed Saki, Afshin Takdastan, Mehri Dinarvand, Sahand Jorfi, Bahman Ramavandi
Saline municipal wastewater treatment is a challenging environmental issue in coastal cities, due to the discharge of saline water into the sewers. The present research article focuses on the phytoremediation of high saline municipal wastewater by Ruppia maritime, a widespread plant which can be found in saline medium such as traditional fish ponds, estuaries, tidal flats, salt pans, coastal paddy fields, coastal lagoons, marsh pools, and mangrove salt marshes in Khuzestan province, Iran. The experimental data was obtained using a pilot plant constructed in Chobeineh wastewater treatment plant in Ahvaz city, fed by activated sludge effluent in 3 levels of electrical conductivity (EC) (10, 15, 20 ms cm(-1)), during 45 days of the experiment...
August 2017: Data in Brief
https://www.readbyqxmd.com/read/28702037/transcriptomic-response-of-purple-willow-salix-purpurea-to-arsenic-stress
#16
Aymeric Yanitch, Nicholas J B Brereton, Emmanuel Gonzalez, Michel Labrecque, Simon Joly, Frederic E Pitre
Arsenic (As) is a toxic element for plants and one of the most common anthropogenic pollutants found at contaminated sites. Despite its severe effects on plant metabolism, several species can accumulate substantial amounts of arsenic and endure the associated stress. However, the genetic mechanisms involved in arsenic tolerance remains obscure in many model plant species used for land decontamination (phytoremediation), including willows. The present study assesses the potential of Salix purpurea cv. 'Fish Creek' for arsenic phytoextraction and reveals the genetic responses behind arsenic tolerance, phytoextraction and metabolism...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28699967/accumulation-of-copper-by-the-aquatic-macrophyte-salvinia-biloba-raddi-salviniaceae
#17
F Freitas, S Lunardi, L B Souza, J S C von der Osten, R Arruda, R L T Andrade, L D Battirola
Aquatic macrophytes have properties and mechanisms which are useful for the removal of substances in solution, commonly used in phytoremediation processes in aquatic environments. This study evaluated the performance of copper (Cu) accumulation by Salvinia biloba Raddi (Salviniaceae) in different metal concentrations (1, 3 and 5 µg mL-1), as well as the control treatment, measured at intervals of 0, 7 and 14 days under laboratory conditions, with control as to pH and luminosity. After the experiment, the S...
July 10, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28699783/phytoremediation-of-organochlorine-pesticides-concept-method-and-recent-developments
#18
Tanvi Singh, Dileep K Singh
Rapid increase in industrialization of world economy in the past century has resulted in significantly high emission of anthropogenic chemicals in the ecosystem. The organochlorine pesticides (OCPs) are a great risk to the global environment and endanger the human health due to their affinity for dispersion, transportation over long distances, and bioaccumulation in the food chain. Phytoremediation is a promising technology that aims to make use of plants and associated bacteria for the treatment of groundwater and soil polluted by these contaminants...
September 2, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28699782/bacterial-siderophores-promote-plant-growth-screening-of-catechol-and-hydroxamate-siderophores
#19
Anna Grobelak, Joanna Hiller
The aim of the study was to determine the quality and quantity of siderophores produced by bacteria isolated from plants' roots. The second aim was to determine the effect of siderophores on plants growth (Festuca rubra L. and Brassica napus L.). The study was carried out using bacteria isolated from roots of: Arabidopsis thaliana L., F. rubra, and Agrostis capillaris L., growing on the heavy metals contaminated area. The chrome azurol sulfonate (CAS) test, Arnow's test for catechol siderophores, and Csaksy's test for hydroxamate siderophores were performed...
September 2, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28692304/a-combination-method-based-on-chitosan-adsorption-and-duckweed-lemna-gibba-l-phytoremediation-for-boron-b-removal-from-drinking-water
#20
Onur Can TÜrker, Talat Baran
The met boron (B) and its compounds widely exist in environments, and boron can poses hazardous effects on plants, animals, and human beings when it is found in high concentrations in water environments. It is difficult and costly to remove B with conventional treatment methods from drinking water. Therefore, alternative and cost effective treatment techniques are imperative. In this study, a novel and environmental friendly method based on chitosan and duckweed (Lemna gibba L.) combination was evaluated for boron removal from drinking water...
July 10, 2017: International Journal of Phytoremediation
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