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https://www.readbyqxmd.com/read/29780396/effects-of-antimony-stress-on-photosynthesis-and-growth-of-acorus-calamus
#1
Xiujie Zhou, Chongyu Sun, Pengfei Zhu, Fei Liu
This study was aimed to explore that effects of Sb on physiological parameters of Acorus calamus and the possibility of using A. calamus as a remediation plant. A. calamus potted experiments were conducted using different concentrations (0, 250, 500, 1000, and 2000 mg/kg) of antimony potassium tartrate (Sb3+ ) (marked as CK, T1 , T2 , T3 , and T4 , respectively) and potassium pyroantimonate (Sb5+ ) (marked as CK, T'1 , T'2 , T'3 , and T'4 , respectively). The effects of Sb stress (Sb3+ and Sb5+ ) on leaf photosynthetic pigments, biomass, photosynthetic characteristics and chlorophyll fluorescence parameters of potted A...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29780374/insight-into-the-variation-of-bacterial-structure-in-atrazine-contaminated-soil-regulating-by-potential-phytoremediator-pennisetum-americanum-l-k-schum
#2
Bo Cao, Ying Zhang, Ziyi Wang, Mengyuan Li, Feng Yang, Duo Jiang, Zhao Jiang
Although plants of the genus Pennisetum can accelerate the removal of atrazine from its rhizosphere, the roles played by this plant in adjusting the soil environment and soil microorganism properties that might contribute to pollutant removal are incompletely understood. We selected Pennisetum americanum (L.) K. Schum ( P. americanum ) as the test plant and investigated the interaction between P. americanum and atrazine-contaminated soil, focusing on the adjustment of the soil biochemical properties as well as bacterial functional and community diversity in the rhizosphere using Biolog EcoPlates and high-throughput sequencing of the 16S rRNA gene...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29778077/selection-of-plants-for-phytoremediation-of-barium-polluted-flooded-soils
#3
Paulo Roberto Cleyton de Castro Ribeiro, Douglas Gomes Viana, Fábio Ribeiro Pires, Fernando Barboza Egreja Filho, Robson Bonomo, Alberto Cargnelutti Filho, Luiz Fernando Martins, Leila Beatriz Silva Cruz, Mauro César Pinto Nascimento
The use of barite (BaSO4) in drilling fluids for oil and gas activities makes barium a potential contaminant in case of spills onto flooded soils, where low redox conditions may increase barium sulfate solubility. In order to select plants able to remove barium in such scenarios, the following species were evaluated on barium phytoextraction capacity: Brachiaria arrecta, Cyperus papyrus, Eleocharis acutangula, E. interstincta, Nephrolepsis cf. rivularis, Oryza sativa IRGA 424, O. sativa BRS Tropical, Paspalum conspersum, and Typha domingensis...
May 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29775821/vermiremediation-of-metal-loid-s-via-eichornia-crassipes-phytomass-extraction-a-sustainable-technique-for-plant-amelioration
#4
Arnab Majumdar, Anil Barla, Munish Kumar Upadhyay, Dibyarpita Ghosh, Punarbasu Chaudhuri, Sudhakar Srivastava, Sutapa Bose
Eichhornia crassipes (water hyacinth), imparts deficiency of soluble arsenic and other toxic metal (loid)s through rhizofiltration and phytoaccumulation. Without proper management strategy, this phytoremediation of metal (loid)s might fail and get reverted back to the environment, contaminating the nearby water bodies. This study, focused on bio-conversion of phytoremediating hyacinths, spiked with 100 times and greater arsenic, lead and cadmium concentrations than the average water contamination, ranging in 58...
May 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29775200/cadmium-induced-changes-in-the-production-of-siderophores-by-a-plant-growth-promoting-strain-of-pseudomonas-fulva
#5
Dominika Thiem, Michał Złoch, Renata Gadzała-Kopciuch, Sonia Szymańska, Christel Baum, Katarzyna Hrynkiewicz
The impact of increasing Cd2+ exposure on the quality and quantity of siderophores produced by a plant growth promoting Pseudomonas fulva strain was tested to gain insight into the degree of change. P. fulva was cultured in the increasing concentrations of Cd2+ (0, 0.5, 1.0, 2.0 mM). The secreted siderophores were separated by HPLC and characterized by UHPLC-QTOF/MS. In the presence of 2 mM Cd2+ synthesis of siderophores (hydroxamates, catecholates, phenolates) was mitigated compared to the treatments with lower concentrations of Cd2+ (0...
May 18, 2018: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29775106/comparison-of-boron-uptake-and-translocation-in-two-vetiver-genotypes-and-evaluation-of-boron-removal-efficiency-of-vetiver-floating-islands
#6
Junliang Xin, Baifei Huang
The objectives of this study were to identify genotypic differences in the uptake and translocation of boron (B) in vetiver (Chrysopogon zizanioides L.), a promising species in B phytoremediation, and to determine the efficiency of vetiver floating island system in B phytoremediation. Changes in plant biomass and B uptake and translocation were determined in two vetiver genotypes, Sierra and Sunshine, cultured hydroponically in a nutrient solution and exposed to six different B concentrations for 7 d and 14 d...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29775104/the-ability-of-silybum-marianum-to-phytoremediate-cadmium-and-or-diesel-oil-from-the-soil
#7
Hossein Hammami, Ebrahim Alaie, Seyed Mohammad Mehdi Dastgheib
Phytoremediation is a new ecological and cost-effective technology applied for cleaning heavy metals and total petroleum hydrocarbon contaminated (TPH-contaminated) soils. This study was conducted to evaluate the potential of milk thistle (Silybum marianum) to phytoremediate cadmium (Cd (II)) from contaminated soils. To this end, the investigators applied a completely randomized design with the factorial arrangement and four replications. The results indicated that all the evaluated parameters of S. Marianum, including shoot and root fresh and dry weight, as well as shoot and root Cd, were significantly influenced by Cd (II) concentration and diesel oil (DO)...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29775102/individual-and-combined-effects-of-cadmium-and-polycyclic-aromatic-hydrocarbons-on-the-phytoremediation-potential-of-xanthium-sibiricum-in-co-contaminated-soil
#8
Nasreen Jeelani, Wen Yang, Yajun Qiao, Jingjing Li, Shuqing An, Xin Leng
Soil contamination with heavy metals and organic pollutants continues to cause major ecological damage and human health problems. Phytoremediation offers a highly promising technology for the recovery of sites contaminated with mixed pollutants. In this study, we performed a greenhouse experiment to investigate the individual and combined effects of cadmium (Cd) and polycyclic aromatic hydrocarbon (PAH) contamination on the growth of Xanthium sibiricum, and also the ability of this species to accumulate and remove Cd and to reduce PAHs over a period of 75 days...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29775101/phytoremediation-of-polycyclic-aromatic-hydrocarbons-pah-by-cv-crioula-a-brazilian-alfalfa-cultivar
#9
Wilber S Alves, Evelin A Manoel, Noemi S Santos, Rosane O Nunes, Giselli C Domiciano, Marcia R Soares
This work aimed to evaluate the phytoremediation capacity of the alfalfa cultivar Crioula in soils contaminated with polycyclic aromatic hydrocarbons (PAHs), primary pollutants with mutagenic and carcinogenic potential. Alfalfa was grown from seed for 40 days on soil amended with anthracene, pyrene, and phenanthrene. Soil and plant tissue was collected for biometric assay, dry mass analysis, and PAH analysis by liquid chromatography. Increased total PAH concentration was associated with decreases in plant biomass, height, and internode length...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29775100/phytoremediation-of-btex-and-naphthalene-from-produced-water-spill-sites-using-poaceae
#10
Amanda Rose Shores, Brittany Hethcock, Melinda Laituri
Surface spills of water produced from hydraulic fracturing can expose soil and groundwater to organics such as BTEX and naphthalene (BTEX&N) as well as high concentrations of salt. As an alternative to soil excavation, we evaluated the effectiveness of BTEX&N soil remediation using 2 grasses present in Colorado. Perennial ryegrass and foxtail barley were grown separately in pots in the greenhouse and exposed to salt or a synthesized produced-water slurry containing relevant levels of salt and BTEX&N...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29775097/phosphate-solubilizing-bacteria-improve-the-phytoremediation-efficiency-of-wedelia-trilobata-for-cu-contaminated-soil
#11
Maozi Lin, Meifang Jin, Kang Xu, Lingchao He, Dongliang Cheng
In a controlled experiment, we assessed the effect of phosphate-solubilizing bacterium (PSB) on the soil metal (Cu2+ ) phytoremediation by Wedelia trilobata and examined the effect of the interaction of Cu contamination and PSB on the growth of W. trilobata. We also explored the effect of the interaction of Cu contamination and PSB on the soil microflora. The results showed that the removal efficiency of Cu from soil by W. trilobata increased with an increase in the concentration of PSB, and the translocation factors of Cu (i...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29761304/metal-accumulation-strategies-of-emergent-plants-in-natural-wetland-ecosystems-contaminated-with-coke-oven-effluent
#12
Vivek Rana, Subodh Kumar Maiti
The release of industrial effluents into natural wetlands is a ubiquitous problem worldwide, and phytoremediation could be a viable option for treatment. The present study assessed metal accumulation strategies of three dominant emergent plants [Colocasia esculenta (L.) Schott, Scirpus grossus (L.) f., and Typha latifolia L.] growing in a wetland contaminated with coke-oven effluent. Metals concentration (mg kg-1 ) in wetland sediment followed the order Mn (408) > Cu (97) > Co (14.2) > Cr (14) > Cd (2...
May 14, 2018: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29758530/arbuscular-mycorrhizal-fungi-alleviate-boron-toxicity-in-puccinellia-tenuiflora-under-the-combined-stresses-of-salt-and-drought
#13
Chunguang Liu, Zheng Dai, Mengying Cui, Wenkai Lu, Hongwen Sun
To investigate the effect of arbuscular mycorrhizal fungi (AMF) on boron (B) toxicity in plants under the combined stresses of salt and drought, Puccinellia tenuiflora was grown in the soil with the inoculation of Funneliformis mosseae and Claroideoglomus etunicatum. After three weeks of treatment, the plants were harvested to determine mycorrhizal colonization rates, plant biomass, as well as tissue B, phosphorus, sodium, and potassium concentrations. The results show that the combined stresses reduced mycorrhizal colonization...
May 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29758311/over-expression-of-the-poplar-expansin-gene-ptoexpa12-in-tobacco-plants-enhanced-cadmium-accumulation
#14
Hao Zhang, Yana Ding, Junkai Zhi, Xiaoyu Li, Huabo Liu, Jichen Xu
As important cell wall proteins in plants, expansins are involved in a serious of abiotic stress resistance such as drought, heat, salt, even heavy metals. To understand the role of expansins in cadmium (Cd) stress, we analyzed the expression patterns of 36 expansin genes in Populus tomentosa. A Cd-induced expansin gene, PtoEXPA12, was identified, cloned, and transformed into tobacco plants. After treatment with Cd, the transgenic plants showed stronger symptoms of Cd toxicity as to the wild-type tobacco plants...
May 11, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29754094/active-green-wall-plant-health-tolerance-to-diesel-smoke-exposure
#15
Naomi J Paull, Peter J Irga, Fraser R Torpy
Poor air quality is an emerging world-wide problem, with most urban air pollutants arising from vehicular emissions. As such, localized high pollution environments, such as traffic tunnels pose a significant health risk. Phytoremediation, including the use of active (ventilated) green walls or botanical biofilters, is gaining recognition as a potentially effective method for air pollution control. Research to date has tested the capacity of these systems to remove low levels of pollutants from indoor environments...
May 10, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29752264/enhanced-and-complete-removal-of-phenylurea-herbicides-by-combinational-transgenic-plant-microbial-remediation
#16
Xin Yan, Jun-Wei Huang, Xi-Hui Xu, Dian Chen, Xiang-Ting Xie, Qing Tao, Jian He, Jian-Dong Jiang
The synergistic relationships between plants and their rhizospheric microbes can be used to develop a combinational bioremediation method, overcoming the constraints of individual phytoremediation or bioaugmentation method. Here, we provide a combinational transgenic plant-microbial remediation system for a more efficient removal of phenylurea herbicides (PHs) from contaminated-sites. The transgenic Arabidopsis thaliana synthesizing the bacterial N -demethylase PdmAB in the chloroplast was developed. The constructed transgenic Arabidopsis exhibited significant tolerance to isoproturon (IPU), a typical PH, and it took up the IPU through roots and transported to leaves, where the majority of the IPU was demethylated to 3-(4-isopropylphenyl)-1-methylurea (MDIPU)...
May 11, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29739310/genetic-diversity-and-characterization-of-arsenic-resistant-endophytic-bacteria-isolated-from-pteris-vittata-an-arsenic-hyperaccumulator
#17
Yunfu Gu, Yingyan Wang, Yihao Sun, Ke Zhao, Quanju Xiang, Xiumei Yu, Xiaoping Zhang, Qiang Chen
BACKGROUND: Alleviating arsenic (As) contamination is a high-priority environmental issue. Hyperaccumulator plants may harbor endophytic bacteria able to detoxify As. Therefore, we investigated the distribution, diversity, As (III) resistance levels, and resistance-related functional genes of arsenite-resistant bacterial endophytes in Pteris vittata L. growing in a lead-zinc mining area with different As contamination levels. RESULTS: A total of 116 arsenite-resistant bacteria were isolated from roots of P...
May 8, 2018: BMC Microbiology
https://www.readbyqxmd.com/read/29737549/effect-of-pb-resistant-plant-growth-promoting-rhizobacteria-inoculation-on-growth-and-lead-uptake-by-lathyrus-sativus
#18
Souhir Abdelkrim, Salwa H Jebara, Omar Saadani, Manel Chiboub, Ghassen Abid, Moez Jebara
In search of efficient and resistant plant growth-promoting rhizobacteria (PGPR) strains with multiple activities, a total of twelve bacterial belonging to R. leguminosarum, S. meliloti, Pseudomonas sp., P. fluorescens, Luteibacter sp., Variovorax sp., B. simplex, and B. megaterium were isolated from root nodules of grass pea (Lathyrus sativus L.) grown in contaminated soils. Upon screening, all test strains were able to synthesize indoleacetic acid; more than 90% were siderophore producers and 75% showed varying levels of phosphate solubilizing ability...
May 8, 2018: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29737488/growth-physiological-responses-and-copper-accumulation-in-seven-willow-species-exposed-to-cu-a-hydroponic-experiment
#19
Yini Cao, Ying Zhang, Chuanxin Ma, Haimei Li, Jianfeng Zhang, Guangcai Chen
Selecting plant species, especially woody species, that can tolerate and accumulate high levels of heavy metals is crucial for the purpose of phytoremediation. In the present study, seven willow species/clones were evaluated for their variations in copper (Cu) tolerance, Cu accumulation, and their relative physiological responses, when exposed to different doses of Cu (control, 15, and 120 μM) in a hydroponic system for 40 days. Upon Cu exposure, all tested willow species/clones (Salix, S.) remained relative normal growth, albeit with some visual evidence of Cu toxicity observed...
May 8, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29736625/two-facets-of-world-arsenic-problem-solution-crop-poisoning-restriction-and-enforcement-of-phytoremediation
#20
REVIEW
Monika Kofroňová, Petra Mašková, Helena Lipavská
This review provides insights into As toxicity in plants with focus on photosynthesis and sugar metabolism as important arsenic targets and simultaneously defence tools against accompanying oxidative stress. Heavy metal contamination is a great problem all over the world. Arsenic, a metalloid occurring naturally in the Earth's crust, also massively spreads out in the environment by human activities. Its accumulation in crops poses a severe health risk to humans and animals. Besides the restriction of human-caused contamination, there are two basic ways how to cope with the problem: first, to limit arsenic accumulation in harvestable parts of the crops; second, to make use of some arsenic hyperaccumulating plants for phytoremediation of contaminated soils and waters...
May 7, 2018: Planta
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