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Phytoremediation of heavy metal

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https://www.readbyqxmd.com/read/27888434/a-novel-heavy-metal-atpase-peptide-from-prosopis-juliflora-is-involved-in-metal-uptake-in-yeast-and-tobacco
#1
Nisha S Keeran, G Ganesan, Ajay K Parida
Heavy metal pollution of agricultural soils is one of the most severe ecological problems in the world. Prosopis juliflora, a phreatophytic tree species, grows well in heavy metal laden industrial sites and is known to accumulate heavy metals. Heavy Metal ATPases (HMAs) are ATP driven heavy metal pumps that translocate heavy metals across biological membranes thus helping the plant in heavy metal tolerance and phytoremediation. In the present study we have isolated and characterized a novel 28.9 kDa heavy metal ATPase peptide (PjHMT) from P...
November 25, 2016: Transgenic Research
https://www.readbyqxmd.com/read/27882491/influence-of-phosphorous-fertilization-on-copper-phytoextraction-and-antioxidant-defenses-in-castor-bean-ricinus-communis-l
#2
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/27866363/comparative-of-quercus-spp-and-salix-spp-for-phytoremediation-of-pb-zn-mine-tailings
#3
Xiang Shi, Shufeng Wang, Haijing Sun, Yitai Chen, Dongxue Wang, Hongwei Pan, Yazhu Zou, Jianfeng Liu, Linyu Zheng, Xiulian Zhao, Zeping Jiang
A pot experiment was conducted to evaluate the feasibility of using tree seedlings for the phytoremediation of lead/zinc (Pb/Zn) mine tailings. Seedlings of three Quercus spp. (Q. shumardii, Q. phellos, and Q. virginiana) and rooted cuttings of two Salix spp. (S. matsudana and S. integra) were transplanted into pots containing 50 and 100 % Pb/Zn mine tailings to evaluate their tolerance of heavy metals. The five species showed different tolerance levels to the Pb/Zn tailings treatments. Q. virginiana was highly tolerant to heavy metals and grew normally in the Pb/Zn tailings...
November 19, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27864737/significance-of-diazotrophic-plant-growth-promoting-herbaspirillum-sp-gw103-on-phytoextraction-of-pband-zn-by-zea-mays-l
#4
Loganathan Praburaman, Sung-Hee Park, Min Cho, Kui-Jae Lee, Jeong-Ae Ko, Sang-Sub Han, Sang-Hyun Lee, Seralathan Kamala-Kannan, Byung-Taek Oh
Microbe-assisted phytoremediation has been considered a promising measure for the remediation of heavy metal-polluted soil. The aim of this study was to assess the effect of diazotrophic plant growth-promoting Herbaspirillum sp. GW103 on growth and lead (Pb) and zinc (Zn) accumulation in Zea mays L. The strain GW103 exhibited plant growth-promoting traits such as indole-3-acetic acid, siderophores, and 1-aminocyclopropane-1-carboxylic deaminase. Treatment of Z. mays L. plants with GW103 significantly increased 19, 31, and 52% of plant biomass and 10, 50, and 126% of chlorophyll a contents in Pb, Zn, and Pb + Zn-amended soils, respectively...
November 18, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27858338/value-added-phytoremediation-of-metal-stressed-soils-using-phosphate-solubilizing-microbial-consortium
#5
REVIEW
Pratishtha Gupta, Vipin Kumar
The presence of heavy metals in the soil is a matter of growing concern due to their toxic and non-biodegradable nature. Lack of effectiveness of various conventional methods due to economic and technical constraints resulted in the search for an eco-friendly and cost-effective biological techniques for heavy metal removal from the environment. Until now, phytoremediation has emerged as an innovative technique to address the problem. However, the efficiency of phytoremediation process is hindered under the high metal concentration conditions...
January 2017: World Journal of Microbiology & Biotechnology
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
#6
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/27826829/phytoextraction-of-heavy-metals-by-potential-native-plants-and-their-microscopic-observation-of-root-growing-on-stabilised-distillery-sludge-as-a-prospective-tool-for-in-situ-phytoremediation-of-industrial-waste
#7
Ram Chandra, Vineet Kumar
The safe disposal of post-methanated distillery sludge (PMDS) in the environment is challenging due to high concentrations of heavy metals along with other complex organic pollutants. The study has revealed that PMDS contained high amounts of Fe (2403), Zn (210), Mn (126), Cu (73.62), Cr (21.825), Pb (16.33) and Ni (13.425 mg kg(-1)) along with melanoidins and other co-pollutants. The phytoextraction pattern in 15 potential native plants growing on sludge showed that the Blumea lacera, Parthenium hysterophorous, Setaria viridis, Chenopodium album, Cannabis sativa, Basella alba, Tricosanthes dioica, Amaranthus spinosus L...
November 8, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27823781/native-herbaceous-plant-species-with-potential-use-in-phytoremediation-of-heavy-metals-spotlight-on-wetlands-a-review
#8
REVIEW
Mayerly Alexandra Oyuela Leguizamo, Wilmar Darío Fernández Gómez, Martha Cecilia Gutiérrez Sarmiento
Soil, air and water pollution caused by the mobility and solubility of heavy metals significantly damages the environment, human health, plants and animals. One common in situ method used for the decontamination of heavy metals is phytoremediation. This usually involves the use of exotic species. However, these species may exhibit invasive behavior, thereby, affect the environmental and ecological dynamics of the ecosystem into which they are introduced. This paper focuses on some native herbaceous plant species reported on the wetlands of Bogota, Colombia, with potential use in phytoremediation of heavy metals...
November 4, 2016: Chemosphere
https://www.readbyqxmd.com/read/27819494/impact-of-chelators-induced-phytoextraction-of-cadmium-on-yield-and-ionic-uptake-of-maize
#9
Sumera Anwar, Shahbaz Khan, M Yasin Ashraf, Sana Ullah Baloch, Sara Zafar, Ali Noman
Enhanced phytoextraction uses soil chelators to increase the bioavailability of heavy metals. This study tested the effectiveness of ethylenediaminetetraaceticacid (EDTA) and citric acid in enhancing cadmium (Cd) phytoextraction, and their effects on the growth, yield, and ionic uptake of maize (Zea mays). Maize seeds of two cultivars were sown in pots treated with 15 (Cd15) or 30 mg Cd kg(-1) soil (Cd30). EDTA and citric acid at 0.5 g kg(-1) each were applied 2 weeks after germination. Results demonstrated that the growth, yield per plant, and total grain weight was reduced by exposure to Cd...
November 7, 2016: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/27819493/effect-of-pseudomonas-fluorescens-rb4-and-bacillus-subtilis-189-on-the-phytoremediation-potential-of-catharanthus-roseus-l-in-cu-and-pb-contaminated-soils
#10
Waheed Ullah Khan, Sajid Rashid Ahmad, Nasim Ahmad Yasin, Aamir Ali, Aqeel Ahmad
The remediation of heavy metal contaminated soils has become a critical issue due to toxic effects of these metals on living organisms. The current research was conducted to study the effect of Pseudomonas fluorescens RB4 and Bacillus subtilis 189 on the growth and phytoremediation potential of Catharanthus roseus in Cu and Pb contaminated soils. The bacterial strains exhibited significantly higher level of water extractable Pb and Cu in Pb, Cu and both elements contaminated soils. The P. fluorescens RB4 inoculated plants, produced 102%, 48% and 45% higher fresh weight (FW) in soils contaminated with Cu, Pb and both elements respectively, as compared to un-inoculated control plants...
November 7, 2016: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/27799283/the-heavy-metal-paradox-in-arbuscular-mycorrhizas-from-mechanisms-to-biotechnological-applications
#11
REVIEW
Nuria Ferrol, Elisabeth Tamayo, Paola Vargas
Arbuscular mycorrhizal symbioses that involve most plants and Glomeromycota fungi are integral and functional parts of plant roots. In these associations, the fungi not only colonize the root cortex but also maintain an extensive network of hyphae that extend out of the root into the surrounding environment. These external hyphae contribute to plant uptake of low mobility nutrients, such as P, Zn, and Cu. Besides improving plant mineral nutrition, arbuscular mycorrhizal fungi (AMF) can alleviate heavy metal (HM) toxicity to their host plants...
October 31, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27795247/draft-genome-sequence-of-enterobacter-ludwigii-ncr3-a-heavy-metal-resistant-rhizobacterium
#12
Eleonora Egidi, Jennifer L Wood, Sanja Aracic, Ruban Kannan, Lachlan McDonald, Carolyn A Bell, Edward M Fox, Wuxing Liu, Ashley E Franks
We report here the draft genome of Enterobacter ludwigii NCR3, a Gram-negative bacterium isolated from the Carpobrotus rossii (Haw.) Schwantes rhizosphere. The analysis of the ~4.8-Mb draft genome shows that this strain harbors several genes associated with heavy metal resistance and plant growth-promoting activity, suggesting its potential application in microbe-assisted phytoremediation.
October 6, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27765495/long-term-performance-of-anaerobic-digestion-for-crop-residues-containing-heavy-metals-and-response-of-microbial-communities
#13
Jongkeun Lee, Joonrae Roger Kim, Seulki Jeong, Jinwoo Cho, Jae Young Kim
In order to investigate the long-term stability on the performance of the anaerobic digestion process, a laboratory-scale continuous stirred-tank reactor (CSTR) was operated for 1100 days with sunflower harvested in a heavy metal contaminated site. Changes of microbial communities during digestion were identified using pyrosequencing. According to the results, soluble heavy metal concentrations were lower than the reported inhibitory level and the reactor performance remained stable up to OLR of 2.0g-VS/L/day at HRT of 20days...
October 17, 2016: Waste Management
https://www.readbyqxmd.com/read/27749263/phytoremediation-potential-of-wild-plants-growing-on-soil-contaminated-with-heavy-metals
#14
Vladica Čudić, Dragoslava Stojiljković, Aleksandar Jovović
Phytoremediation is an emerging technology that employs higher plants to cleanup contaminated environments, including metal-polluted soils. Because it produces a biomass rich in extracted toxic metals, further treatment of this biomass is necessary. The aim of our study was to assess the five-year potential of the following native wild plants to produce biomass and remove heavy metals from a polluted site: poplar (Populus ssp.), ailanthus (Ailanthus glandulosa L.), false acacia (Robinia pseudoacacia L.), ragweed (Artemisia artemisiifolia L...
September 1, 2016: Arhiv za Higijenu Rada i Toksikologiju
https://www.readbyqxmd.com/read/27739883/effects-of-pisolithus-tinctorius-and-cenococcum-geophilum-inoculation-on-pine-in-copper-contaminated-soil-to-enhance-phytoremediation
#15
Zhugui Wen, Liang Shi, Yangze Tang, Zhenguo Shen, Yan Xia, Yahua Chen
We used Pisolithus tinctorius and Cenococcum geophilum to determine the copper (Cu) resistance of ectomycorrhizal (ECM) fungi and their potential for improving phytoremediation of Cu-contaminated soil by Chinese red pine (Pinus tabulaeformis). The results showed that nutrient accumulation in C. geophilum mycelium was significantly lower under higher Cu concentrations in the soil, which was not observed in P. tinctorius. Meanwhile, P. tinctorius exhibited greater Cu tolerance than C. geophilum. Inoculation with ECM fungi significantly improved the growth of pine shoots planted in polluted soil in pot experiments (p < 0...
October 14, 2016: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/27721129/removal-of-mercury-from-gold-mine-effluents-using-limnocharis-flava-in-constructed-wetlands
#16
José Marrugo-Negrete, Germán Enamorado-Montes, José Durango-Hernández, José Pinedo-Hernández, Sergi Díez
Phytoremediation has received increased attention over the recent decades, as an emerging and eco-friendly approach that utilizes the natural properties of plants to remediate contaminated water, soils or sediments. The current study provides information about a pilot-scale experiment designed to evaluate the potential of the anchored aquatic plant Limnocharis flava for phytoremediation of water contaminated with mercury (Hg), in a constructed wetland (CW) with horizontal subsurface flow (HSSF). Mine effluent used in this experiment was collected from a gold mining area located at the Alacran mine in Colombia (Hg: 0...
October 5, 2016: Chemosphere
https://www.readbyqxmd.com/read/27712089/tolerance-and-hyperaccumulation-of-a-mixture-heavy-metals-cu-pb-hg-and-zn-by-four-aquatic-macrophytes
#17
Jorge Alberto Romero-Hernández, Araceli Amaya-Chávez, Patricia Balderas-Hernández, Gabriela Roa-Morales, Nelly González-Rivas, Miguel Ángel Balderas-Plata
In the present investigation, four macrophytes, namely, Typha latifolia (L.), Lemna minor (L.), Eichhornia crassipes (Mart.) Solms-Laubach and Miriophyllum aquaticum (Vell.) Verdc, were evaluated for their heavy metal (Cu, Pb, Hg and Zn) hyperaccumulation potential under laboratory conditions. Tolerance analyses were performed for 7 days of exposure at five different treatments of the metals mixture (Cu(+2), Hg(+2), Pb(+2) and Zn(+2)). The production of chlorophyll and carotenoids was determined at the end of each treatment...
August 11, 2016: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/27704817/oxytetracycline-toxicity-and-its-effect-on-phytoremediation-by-sedum-plumbizincicola-and-medicago-sativa-in-metal-contaminated-soil
#18
Tingting Ma, Liqiang Zhou, Li 'ke Chen, Zhu Li, Longhua Wu, Peter Christie, Yongming Luo
Excessive use of antibiotics potentially threatens human health, agricultural production and soil phytoremediation. This arouses concern over the potential adverse effects of a commonly used antibiotic, oxytetracycline (OTC), on plants used for soil remediation and possible stimulation of antibiotic resistance genes in soils. A greenhouse experiment was conducted to investigate different rates (0, 1, 5, and 25 mg kg-1) and frequencies (one single high and daily low application) of OTC addition to soil on phytoremediation of a heavy metal contaminated soil by Sedum plumbizincicola and/or Medicago sativa (alfalfa)...
October 5, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27665448/endophytic-fungi-and-soil-microbial-community-characteristics-over-different-years-of-phytoremediation-in-a-copper-tailings-dam-of-shanxi-china
#19
Jia Tong, Cao Miaowen, Jing Juhui, Liu Jinxian, Chai Baofeng
We conducted a survey of native grass species infected by endophytic fungi in a copper tailings dam over progressive years of phytoremediation. We investigated how endophytic fungi, soil microbial community structure and soil physiochemical properties and enzymatic activity varied in responses to heavy metal pollution over different stages of phytoremediation. endophyte infection frequency increased with years of phytoremediation. Rates of endophyte infection varied among different natural grass species in each sub-dam...
September 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27620529/rhizobacteria-and-plant-symbiosis-in-heavy-metal-uptake-and-its-implications-for-soil-bioremediation
#20
Dana Luminița Sobariu, Daniela Ionela Tudorache Fertu, Mariana Diaconu, Lucian Vasile Pavel, Raluca-Maria Hlihor, Elena Niculina Drăgoi, Silvia Curteanu, Markus Lenz, Philippe François-Xavier Corvini, Maria Gavrilescu
Certain species of plants can benefit from synergistic effects with plant growth-promoting rhizobacteria (PGPR) that improve plant growth and metal accumulation, mitigating toxic effects on plants and increasing their tolerance to heavy metals. The application of PGPR as biofertilizers and atmospheric nitrogen fixators contributes considerably to the intensification of the phytoremediation process. In this paper, we have built a system consisting of rhizospheric Azotobacter microbial populations and Lepidium sativum plants, growing in solutions containing heavy metals in various concentrations...
September 9, 2016: New Biotechnology
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