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https://www.readbyqxmd.com/read/28923732/ammonium-based-fertilizers-enhance-cd-accumulation-in-carpobrotus-rossii-grown-in-two-soils-differing-in-ph
#1
Miaomiao Cheng, Anan Wang, Caixian Tang
Nitrogen fertilization has been shown to improve Cd uptake by plants but there is little information on the effect of N form. This study examined the effects of N form on Cd bioavailability and phytoextraction in two soils differing in pH. Plants of halophytic species Carpobrotus rossii were grown in an acidic Sodosol [pH (CaCl2) 4.9] and a neutral Vertosol (pH 7.2) spiked with 20 mg kg(-1) Cd as CdCl2. Three N forms, KNO3, (NH4)2SO4 and (NH2)2CO at a rate of 24 mg N kg(-1) were applied at weekly intervals, together with nitrification inhibitor dicyanodiamide...
September 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28914778/screening-for-autochthonous-phytoextractors-in-a-heavy-metal-contaminated-coal-mining-area
#2
Kuangjia Li, Zijian Lun, Lin Zhao, Qilong Zhu, Yansheng Gu, Manzhou Li
In order to protect public health and crops from soil heavy metal (HM) contamination at a coal mining area in Henan, central China, HM pollution investigation and screening of autochthonous HM phytoextractors were conducted. The concentrations of cadmium (Cd), lead (Pb), copper (Cu) and zinc (Zn) in surface soils exceeded the corresponding local background values and the China National Standard (CNS). The maximum potential ecological risk (RI) was 627.30, indicating very high ecological risk. The monomial risk of Cd contributed the most to the RI, varying from 85...
September 15, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28895025/leaching-variations-of-heavy-metals-in-chelator-assisted-phytoextraction-by-zea-mays-l-exposed-to-acid-rainfall
#3
Yayin Lu, Dinggui Luo, Lirong Liu, Zicong Tan, An Lai, Guowei Liu, Junhui Li, Jianyou Long, Xuexia Huang, Yongheng Chen
Chelant-enhanced phytoextraction method has been put forward as an effective soil remediation method, whereas the heavy metal leaching could not be ignored. In this study, a cropping-leaching experiment, using soil columns, was applied to study the metal leaching variations during assisted phytoextraction of Cd- and Pb-polluted soils, using seedlings of Zea mays, applying three different chelators (EDTA, EDDS, and rhamnolipid), and artificial rainfall (acid rainfall or normal rainfall). It showed that artificial rainfall, especially artificial acid rain, after chelator application led to the increase of heavy metals in the leaching solution...
September 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28892018/antioxidant-artemisia-princeps-extract-enhances-the-expression-of-filaggrin-and-loricrin-via-the-ahr-ovol1-pathway
#4
Akiko Hirano, Masashi Goto, Tsukasa Mitsui, Akiko Hashimoto-Hachiya, Gaku Tsuji, Masutaka Furue
The Japanese mugwort, Artemisia princeps (yomogi in Japanese), has anti-inflammatory and antioxidant effects. Skin care products containing Artemisia princeps extract (APE) are known to improve dry skin symptoms in atopic dermatitis. Atopic dry skin is associated with a marked reduction of skin barrier proteins, such as filaggrin (FLG) and loricrin (LOR). Recently, aryl hydrocarbon receptor (AHR), and its downstream transcription factor OVO-like 1 (OVOL1), have been shown to regulate the gene expression of FLG and LOR...
September 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28887416/identifying-the-active-microbiome-associated-with-roots-and-rhizosphere-soil-of-oilseed-rape
#5
Konstantia Gkarmiri, Shahid Mahmood, Alf Ekblad, Sadhna Alström, Nils Högberg, Roger Finlay
RNA stable isotope probing and high throughput sequencing were used to characterize the active microbiomes of bacteria and fungi colonizing roots and rhizosphere soil of oilseed rape, to identify taxa assimilating plant-derived carbon following (13)CO2 labeling. Root- and rhizosphere soil-associated communities of both bacteria and fungi differed from each other and there were highly significant differences between their DNA- and RNA-based community profiles. Verrucomicrobia, Proteobacteria, Planctomycetes, Acidobacteria, Gemmatimonadetes, Actinobacteria and Chloroflexi were the most active bacterial phyla in the rhizosphere soil...
September 8, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28881242/comparison-of-three-types-of-oil-crop-rotation-systems-for-effective-use-and-remediation-of-heavy-metal-contaminated-agricultural-soil
#6
Yang Yang, Xihong Zhou, Boqing Tie, Liang Peng, Hongliang Li, Kelin Wang, Qingru Zeng
Selecting suitable plants tolerant to heavy metals and producing products of economic value may be a key factor in promoting the practical application of phytoremediation polluted soils. The aim of this study is to further understand the utilization and remediation of seriously contaminated agricultural soil. In a one-year field experiment, we grew oilseed rape over the winter and then subsequently sunflowers, peanuts and sesame after the first harvest. This three rotation system produced high yields of dry biomass; the oilseed rape-sunflower, oilseed rape-peanut and oilseed rape-sesame rotation allowed us to extract 458...
August 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28872855/degrading-and-phytoextracting-atrazine-residues-in-rice-oryza-sativa-and-growth-media-intensified-by-a-phase-ii-mechanism-modulator
#7
Jing Jing Zhang, Shuai Gao, Jiang-Yan Xu, Yi Chen Lu, Feng Fan Lu, Li Ya Ma, Xiang Ning Su, Hong Yang
Atrazine (ATZ) residue in farmland is one of the environmental contaminants seriously affecting crop production and food safety. Various strategies have been suggested for degradation of ATZ in soils, but no report is available for its degradation in plants. This report describes engineered rice overexpressing a novel Phase II metabolism enzyme ARGT1 responsible for degradation of ATZ residues in rice plants. Our results showed that transformed lines, when exposed to environmentally realistic ATZ (0.2-0.8 mg/L), displayed significantly high tolerance, with 8-27% biomass and 36-56% chlorophyll content higher, but 37-69% plasma membrane injury lower than untransformed lines...
September 5, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28862490/phytoextraction-potential-of-water-fern-azolla-pinnata-in-the-removal-of-a-hazardous-dye-methyl-violet-2b-artificial-neural-network-modelling
#8
Muhammad Raziq Rahimi Kooh, Linda B L Lim, Lee Hoon Lim, Owais Ahmed Malik
This study investigated the potential of Azolla pinnata (AP) in the removal of toxic methyl violet 2B (MV) dye wastewater using the phytoextraction approach with the inclusion of an Artificial Neural Network (ANN) modelling. Parameters examined included the effects of dye concentration, pH and plant dosage. The highest removal efficiency was 93% which was achieved at a plant dosage of 0.8 g (dye volume = 200 mL, initial pH = 6.0, initial dye concentration = 10 mg L(-1)). A significant decrease in relative frond number (RFN), a growth rate estimator, observed at a dye concentration of 20 mg L(-1) MV indicated some toxicity, which coincided with the plant pigments studies where the chlorophyll a content was lower than the control...
September 1, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28862489/subcellular-distribution-chemical-forms-and-thiol-synthesis-involved-in-cadmium-tolerance-and-detoxification-in-siegesbeckia-orientalis-l
#9
Xiaoxun Xu, Shirong Zhang, Junren Xian, Zhanbiao Yang, Zhang Cheng, Ting Li, Yongxia Jia, Yulin Pu, Yun Li
Siegesbeckia orientalis L. is a promising species for cadmium (Cd) phytoextraction with large biomass and fast growth rate, while little information about their intracellular mechanisms involved in Cd tolerance and detoxification has been explored. A soil pot experiment with total target Cd concentrations of 0, 10, 50, 100 and 150 mg kg(-1) were designed to investigate the subcellular distribution, chemical forms and thiol synthesis characteristics of Cd in S. orientalis. More than 90% of Cd was bound to the soluble fractions (48...
September 1, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28862473/from-phytoremediation-of-soil-contaminants-to-phytomanagement-of-ecosystem-services-in-metal-contaminated-sites
#10
Aritz Burges, Itziar Alkorta, Lur Epelde, Carlos Garbisu
Since the emergence of phytoremediation, much research has focused on its development for (i) the removal of metals from soil and/or (ii) the reduction of metal bioavailability, mobility and ecotoxicity in soil. Here, we review the lights and shades of the two main strategies (i.e., phytoextraction and phytostabilization) currently used for the phytoremediation of metal contaminated soils, irrespective of the level of such contamination. Both strategies face limitations to become successful at commercial scale and, then, often generate skepticism regarding their usefulness...
September 1, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28843188/a-comparative-study-to-evaluate-natural-attenuation-mycoaugmentation-phytoremediation-and-microbial-assisted-phytoremediation-strategies-for-the-bioremediation-of-an-aged-pah-polluted-soil
#11
Mercedes García-Sánchez, Zdeněk Košnář, Filip Mercl, Elisabet Aranda, Pavel Tlustoš
Biological treatments are considered an environmentally option to clean-up polluted soil with polycyclic aromatic hydrocarbons (PAHs). A pot experiment was conducted to comparatively evaluate four different strategies, including natural attenuation (NA), mycoaugmentation (M) by using Crucibulum leave, phytoremediation (P) using maize plants, and microbial-assisted phytoremediation (MAP) for the bioremediation of an aged PAH-polluted soil at 180 days. The P treatment had higher affinity degrading 2-3 and 4 ring compounds than NA and M treatments, respectively...
August 23, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28819831/biodiversity-variability-and-metal-accumulation-strategies-in-plants-spontaneously-inhibiting-fly-ash-lagoon-india
#12
Suchita Mukhopadhyay, Vivek Rana, Adarsh Kumar, Subodh Kumar Maiti
Out of 29 plant species taken into consideration for biodiversity investigations, the present study screened out Cyperus rotundus L., Calotropis procera (Aiton) W.T. Aiton, Croton bonplandianus Baill., Eclipta prostrata (L.) L., and Vernonia cinerea (L.) Less. as the most suitable metal-tolerant plant species (high relative density and frequency) which can grow on metal-laden fly ash (FA) lagoon. Total (aqua-regia), residual (HNO3) and plant available (CaCl2) metal concentrations were assessed for the clean-up of metal-contaminated FA disposal site using naturally colonized plants...
August 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28802993/microbial-community-structure-and-activity-in-trace-element-contaminated-soils-phytomanaged-by-gentle-remediation-options-gro
#13
M Touceda-González, Á Prieto-Fernández, G Renella, L Giagnoni, A Sessitsch, G Brader, J Kumpiene, I Dimitriou, J Eriksson, W Friesl-Hanl, R Galazka, J Janssen, M Mench, I Müller, S Neu, M Puschenreiter, G Siebielec, J Vangronsveld, P S Kidd
Gentle remediation options (GRO) are based on the combined use of plants, associated microorganisms and soil amendments, which can potentially restore soil functions and quality. We studied the effects of three GRO (aided-phytostabilisation, in situ stabilisation and phytoexclusion, and aided-phytoextraction) on the soil microbial biomass and respiration, the activities of hydrolase enzymes involved in the biogeochemical cycles of C, N, P, and S, and bacterial community structure of trace element contaminated soils (TECS) from six field trials across Europe...
August 10, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28798499/comparative-assessment-of-response-to-cadmium-in-heavy-metal-tolerant-shrubs-cultured-in-vitro
#14
A Wiszniewska, E Hanus-Fajerska, E Muszyńska, S Smoleń
Two species of Pb-adapted shrubs, Alyssum montanum and Daphne jasminea, were evaluated in vitro for their tolerance to elevated concentrations of cadmium. Shoot cultures were treated with 0.5, 2.5, and 5.0 μM CdCl2 for 16 weeks and analyzed for their organogenic response, biomass accretion, pigment content, and macronutrient status. Cadmium accumulation and its root-to-shoot translocation were also determined. In both species, rooted microplantlets, suitable for acclimatization, were obtained in the presence of Cd applied as selection agent...
2017: Water, Air, and Soil Pollution
https://www.readbyqxmd.com/read/28791581/phytoextraction-of-potentially-toxic-elements-by-six-tree-species-growing-on-hazardous-mining-sludge
#15
Mirosław Mleczek, Piotr Goliński, Magdalena Krzesłowska, Monika Gąsecka, Zuzanna Magdziak, Paweł Rutkowski, Sylwia Budzyńska, Bogusława Waliszewska, Tomisław Kozubik, Zbigniew Karolewski, Przemysław Niedzielski
The aim of the study was to compare the phytoextraction abilities of six tree species (Acer platanoides L., Acer pseudoplatanus L., Betula pendula Roth, Quercus robur L., Tilia cordata Miller, Ulmus laevis Pall.), cultivated on mining sludge contaminated with arsenic (As), cadmium (Cd), copper (Cu), lead (Pb), thallium (Tl), and zinc (Zn). All six tree species were able to survive on such an unpromising substrate. However, A. platanoides and T. cordata seedlings grown on the polluted substrate showed significantly lower biomass than control plants (55...
August 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28775260/phytoextraction-of-cadmium-contaminated-soil-and-potential-of-regenerated-tobacco-biomass-for-recovery-of-cadmium
#16
Yang Yang, Yichen Ge, Hongyuan Zeng, Xihong Zhou, Liang Peng, Qingru Zeng
The aim of this study was to estimate the influence of regenerated tobacco on the extraction of Cd from two acidic soils as well as to address the problem of how to deal with contaminated leaves following phytoextraction. Results showed that a coppicing tobacco led to a decline in Cd concentration in regenerated leaves and stalks when plants were grown in pots, but increased concentrations in regenerated lower and middle leaves when plants were grown under field conditions. The highest recorded bioconcentration factors in Chaling and Guanxi soil were 37...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28759788/isolation-of-vanadium-resistance-endophytic-bacterium-pre01-from-pteris-vittata-in-stone-coal-smelting-district-and-characterization-for-potential-use-in-phytoremediation
#17
Liang Wang, Hai Lin, Yingbo Dong, Yinhai He, Chenjing Liu
This study investigates the V-resistant endophytic bacteria isolated from V-accumulator Pteris vittata grown on stone coal smelting district. Among all the ten isolates, the strain PRE01 identified as Serratia marcescens ss marcescens by Biolog GEN III MicroPlate™ was screened out by ranking first in terms of heavy metal resistance and plant growth promoting traits. The S. marcescens PRE01 had strong V, Cr and Cd resistance especially for V up to 1500mg/L. In addition, it exhibited ACC deaminase activity, siderophore production and high indoleacetic acid production (60...
July 24, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28759767/heavy-metals-in-contaminated-environment-destiny-of-secondary-metabolite-biosynthesis-oxidative-status-and-phytoextraction-in-medicinal-plants
#18
REVIEW
Behnam Asgari Lajayer, Mansour Ghorbanpour, Shahab Nikabadi
Contamination of soils, water and air with toxic heavy metals by various human activities is a crucial environmental problem in both developing and developed countries. Heavy metals could be introduced into medicinal plant products through contaminated environment (soil, water and air resources) and/or poor production practices. Growing of medicinal plants in heavy metal polluted environments may eventually affect the biosynthesis of secondary metabolites, causing significant changes in the quantity and quality of these compounds...
July 28, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28752309/cadmium-phytoremediation-potential-of-turnip-compared-with-three-common-high-cd-accumulating-plants
#19
Xiong Li, Xiaoming Zhang, Boqun Li, Yuansheng Wu, Hang Sun, Yongping Yang
Phytoextraction is a phytoremediation technique used for remediating polluted soils and it greatly relies on the plants' capacities to accumulate contaminants. Turnip is a high cadmium (Cd)-accumulating plant. We compared the Cd tolerance, growth, and Cd accumulation characteristics of two turnip landraces with three additional commonly known high Cd-accumulating species to systematically estimate its Cd phytoremediation potential. Results showed that the turnips could tolerate relatively lower Cd concentrations than other plants...
July 27, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28726228/microwave-irradiation-and-citric-acid-assisted-seed-germination-and-phytoextraction-of-nickel-ni-by-brassica-napus-l-morpho-physiological-and-biochemical-alterations-under-ni-stress
#20
Mujahid Farid, Shafaqat Ali, Muhammad Rizwan, Rashid Saeed, Hafiz Muhammad Tauqeer, Rasham Sallah-Ud-Din, Ahmed Azam, Nighat Raza
The complex bio-geochemistry of soil allows pollutant to persist for a longer period of time which further decreased the fertility and natural composition of land. Nickel, an inorganic pollutant, coming from a wide range of industrial and manufacturing units possesses serious threat to soil degradation and crop productivity around the world. The present study was carried to evaluate the combined role of microwave irradiation (MR) and citric acid (CA) on the phytoextraction potential of Brassica napus L. under Ni stress...
July 20, 2017: Environmental Science and Pollution Research International
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