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Arsenic plant

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https://www.readbyqxmd.com/read/28324662/arsenic-tolerance-and-phytoremediation-potential-of-conocarpus-erectus-l-and-populus-deltoides-l
#1
Sajad Hussain, Muhammad Akram, Ghulam Abbas, Behzad Murtaza, Muhammad Shahid, Noor S Shah, Irshad Bibi, Nabeel Khan Niazi
The present study was conducted to explore arsenic (As) tolerance and phytostabilization potential of the two tree species, Buttonwood (Conocarpus erectus) and Eastern cottonwood (Populus deltoides). Both plant species were exposed to various soil As levels (control, 5, 10, 15 and 20 mg kg(-1)) in pots. The plants were harvested after nine months for evaluation of growth parameters as well as root and shoot As concentrations. With increasing soil As levels, plant height stress tolerance index (PHSTI) was significantly decreased in both tree species, whereas root length stress tolerance index (RLSTI) and dry matter stress tolerance index (DMSTI) were not affected...
March 21, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28298917/arsenic-transport-in-rice-and-biological-solutions-to-reduce-arsenic-risk-from-rice
#2
REVIEW
Yanshan Chen, Yong-He Han, Yue Cao, Yong-Guan Zhu, Bala Rathinasabapathi, Lena Q Ma
Rice (Oryza sativa L.) feeds ∼3 billion people. Due to the wide occurrence of arsenic (As) pollution in paddy soils and its efficient plant uptake, As in rice grains presents health risks. Genetic manipulation may offer an effective approach to reduce As accumulation in rice grains. The genetics of As uptake and metabolism have been elucidated and target genes have been identified for genetic engineering to reduce As accumulation in grains. Key processes controlling As in grains include As uptake, arsenite (AsIII) efflux, arsenate (AsV) reduction and AsIII sequestration, and As methylation and volatilization...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28296918/calcium-dependent-protein-kinase-cpk31-interacts-with-arsenic-transporter-atnip1-1-and-regulates-arsenite-uptake-in-arabidopsis-thaliana
#3
Ruijie Ji, Liming Zhou, Jinglong Liu, Yuan Wang, Lei Yang, Qinsong Zheng, Chi Zhang, Bin Zhang, Haiman Ge, Yonghua Yang, Fugeng Zhao, Sheng Luan, Wenzhi Lan
Although arsenite [As(III)] is non-essential and toxic for plants, it is effectively absorbed through various transporters into the roots. Here we identified a calcium-dependent protein kinase (CPK31) response for As(III) tolerance in Arabidopsis. We identified CPK31 as an interacting protein of a nodulin 26-like intrinsic protein (NIP1;1), an aquaporin involved in As(III) uptake. Similarly to the nip1;1 mutants, the loss-of-function mutants of CPK31 improved the tolerance against As(III) but not As(V), and accumulated less As(III) in roots than that of the wild-type plants...
2017: PloS One
https://www.readbyqxmd.com/read/28283922/identification-of-alternatively-spliced-transcripts-of-rice-phytochelatin-synthase-2-gene-ospcs2-involved-in-mitigation-of-cadmium-and-arsenic-stresses
#4
Natasha Das, Surajit Bhattacharya, Somnath Bhattacharyya, Mrinal K Maiti
The OsPCS2 exhibits root- and shoot-specific differential ratios of alternatively spliced transcripts in indica rice under Cd stress, and plays role in Cd and As stress tolerance and accumulation. Enzymatic activity of phytochelatin synthase (PCS) in plant produces phytochelatins, which help in sequestration of heavy metal(loid)s inside the cell vacuole to alleviate toxicity. Here we report that among the two PCS genes-OsPCS1 and OsPCS2 in indica rice (Oryza sativa) cultivar, the OsPCS2 produces an alternatively spliced OsPCS2b transcript that bears the unusual premature termination codon besides the canonically spliced OsPCS2a transcript...
March 11, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28273574/ionomic-and-transcriptomic-analysis-provides-new-insight-into-the-distribution-and-transport-of-cadmium-and-arsenic-in-rice
#5
Xuemin Feng, Lei Han, Daiyin Chao, Yan Liu, Yajing Zhang, Ruigang Wang, Junkang Guo, Renwei Feng, Yingming Xu, Yongzhen Ding, Biyan Huang, Guilong Zhang
To identify the key barrier parts and relevant elements during Cd/As transport into brown rice, 16 elements were measured in 14 different parts of 21 rice genotypes; moreover, transcriptomic of different nodes was analyzed. Cd/As contents in root and nodes were significantly higher than those other parts. Node I had the highest Cd content among nodes, leading an increase in gene expressions involved in glycolytic and Cd detoxification. The Cu/Zn/Co distribution and transport to various parts was similar to that of Cd, and Fe/Sb distribution and transport to various parts was similar to that of As...
February 24, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28273532/arsenic-uptake-by-lettuce-from-as-contaminated-soil-remediated-with-pteris-vittata-and-organic-amendment
#6
Letuzia M de Oliveira, Das Suchismita, Julia Gress, Bala Rathinasabapathi, Yanshan Chen, Lena Q Ma
Leaching of inorganic arsenic (As) from chromated copper arsenate (CCA)-treated wood may elevate soil As levels. Thus, an environmental concern arises regarding As accumulation in vegetables grown in these soils. In this study, a greenhouse experiment was conducted to investigate the ability of As-hyperaccumulator P. vittata and organic amendments in reducing As uptake by lettuce (Lactuca sativa) from a soil contaminated from CCA-treated wood (63.9 mg kg(-1) As). P. vittata was grown for 150 d in a CCA-contaminated soil amended with biochar, activated carbon or coffee grounds at 1%, followed by lettuce for another 55 d...
February 24, 2017: Chemosphere
https://www.readbyqxmd.com/read/28273243/effect-of-phosphorus-on-arsenic-uptake-and-metabolism-in-rice-cultivars-differing-in-phosphorus-use-efficiency-and-response
#7
Júlia G Farias, Katieli Bernardy, Raíssa Schwalbert, Bianca K Del Frari, Andrew Meharg, Manus Carey, Anderson C R Marques, Antonio Signes-Pastor, Darlene Sausen, Márcio R W Schorr, Mirian S Tavares, Fernando T Nicoloso
A hydroponic experiment was carried out to investigate the effect of phosphorus (P) nutrition on arsenic (As) uptake and translocation within the seedlings of rice cultivars. The experiment occurred in three stages: I 5 days of acclimatization (nutritive solution); II 10 days under P (0.0 and 0.09 mM) and As (0.0 and 100 mM) treatments; III 5 days under recovery. The As exposure had significant effect reducing dry weights of shoots or roots, resulted in elevated concentrations of As in shoot tissues. BR-IRGA 409 showed the highest susceptibility to As in biomass production and root system parameters regardless the P level...
March 2, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28250647/methanol-extract-of-adansonia-digitata-leaf-protects-against-sodium-arsenite-induced-toxicities-in-male-wistar-rats
#8
Ayodeji Mathias Adegoke, Michael Adedapo Gbadegesin, Oyeronke Adunni Odunola
BACKGROUND: Human and animal population exposure to arsenic through the consumption of arsenic contaminated water is rampant in many parts of the world. Protective agents of medicinal plants origin could provide maximum protection against toxicities of various kinds. OBJECTIVE: The protective role of orally administered methanol extract of the leaves of Adansonia digitata (MELAD) on sodium arsenite (SA) - induced clastogenicity and hepatotoxicity in male Wistar rats was evaluated...
January 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28249191/inoculating-chlamydospores-of-trichoderma-asperellum-sm-12f1-changes-arsenic-availability-and-enzyme-activity-in-soils-and-improves-water-spinach-growth
#9
Shiming Su, Xibai Zeng, Lingyu Bai, Paul N Williams, Yanan Wang, Lili Zhang, Cuixia Wu
Arsenic (As)-contaminated agricultural soils threaten crop yields and pose a human health risk. Augmentation of exogenous microorganisms exhibiting plant-growth promoting and As speciation changing shows potential to improve crop growth and change soil As availability. Trichoderma asperellum SM-12F1 exhibiting both traits was developed into chlamydospores to improve its persistence in contaminated soils. After inoculation, As availability and enzyme activity in two types of soils and the growth as well as As uptake of water spinach (Ipomoea aquatic Forsk...
May 2017: Chemosphere
https://www.readbyqxmd.com/read/28238459/linking-sources-to-early-effects-by-profiling-urine-metabolome-of-residents-living-near-oil-refineries-and-coal-fired-power-plants
#10
Chi-Hsin Sally Chen, Tzu-Hsuen Yuan, Ruei-Hao Shie, Kuen-Yuh Wu, Chang-Chuan Chan
BACKGROUND: This study aims at identifying metabolic changes linking external exposure to industrial air toxics with oxidative stress biomarkers. METHODS: We classified 252 study subjects as 111 high vs. 141 low exposure subjects by the distance from their homes to the two main emission sources, oil refineries and coal-fired power plants. We estimated individual's external exposure to heavy metals and polycyclic aromatic hydrocarbons (PAHs) by dispersion and kriging models, respectively...
February 23, 2017: Environment International
https://www.readbyqxmd.com/read/28223993/diacylglycerol-kinases-are-widespread-in-higher-plants-and-display-inducible-gene-expression-in-response-to-beneficial-elements-metal-and-metalloid-ions
#11
Hugo F Escobar-Sepúlveda, Libia I Trejo-Téllez, Paulino Pérez-Rodríguez, Juan V Hidalgo-Contreras, Fernando C Gómez-Merino
Diacylglycerol kinases (DGKs) are pivotal signaling enzymes that phosphorylate diacylglycerol (DAG) to yield phosphatidic acid (PA). The biosynthesis of PA from phospholipase D (PLD) and the coupled phospholipase C (PLC)/DGK route is a crucial signaling process in eukaryotic cells. Next to PLD, the PLC/DGK pathway is the second most important generator of PA in response to biotic and abiotic stresses. In eukaryotic cells, DGK, DAG, and PA are implicated in vital processes such as growth, development, and responses to environmental cues...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28214191/potential-of-different-am-fungi-native-from-as-contaminated-and-uncontaminated-soils-for-supporting-leucaena-leucocephala-growth-in-as-contaminated-soil
#12
Jerusa Schneider, Jochen Bundschuh, Wesley de Melo Rangel, Luiz Roberto Guimarães Guilherme
Arbuscular mycorrhizal (AM) fungi inoculation is considered a potential biotechnological tool for an eco-friendly remediation of hazardous contaminants. However, the mechanisms explaining how AM fungi attenuate the phytotoxicity of metal(oid)s, in particular arsenic (As), are still not fully understood. The influence of As on plant growth and the antioxidant system was studied in Leucaena leucocephala plants inoculated with different isolates of AM fungi and exposed to increasing concentrations of As (0, 35, and 75 mg dm(-3)) in a Typic Quartzipsamment soil...
February 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28212511/arsenic-hyperaccumulator-pteris-vittata-efficiently-solubilized-phosphate-rock-to-sustain-plant-growth-and-as-uptake
#13
Jing-Wei Fu, Xue Liu, Yong-He Han, Hanyi Mei, Yue Cao, Letuzia M de Oliveira, Yungen Liu, Bala Rathinasabapathi, Yanshan Chen, Lena Q Ma
Phosphorus (P) is one of the most important nutrients for phytoremediation of arsenic (As)-contaminated soils. In this study, we demonstrated that As-hyperaccumulator Pteris vittata was efficient in acquiring P from insoluble phosphate rock (PR). When supplemented with PR as the sole P source in hydroponic systems, P. vittata accumulated 49% and 28% higher P in the roots and fronds than the -P treatment. In contrast, non-hyperaccumulator Pteris ensiformis was unable to solubilize P from PR. To gain insights into PR solubilization by plants, organic acids in plant root exudates were analyzed by HPLC...
January 31, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28202263/arsenic-mobility-and-bioavailability-in-paddy-soil-under-iron-compound-amendments-at-different-growth-stages-of-rice
#14
Huan-Yun Yu, Xiangqin Wang, Fangbai Li, Bin Li, Chuanping Liu, Qi Wang, Jing Lei
Iron (Fe)-based solids can reduce arsenic (As) mobility and bioavailability in soils, which has been well recognized. However, to our knowledge, there are few studies on As uptake at different growth stages of rice under Fe compound amendments. In addition, the formation of Fe plaques at different growth stages of rice has also been rarely reported. Therefore, the present study was undertaken to investigate As mobility and bioavailability in paddy soil under Fe compound amendments throughout the whole growth stage of rice plants...
February 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28188207/use-of-endophytic-and-rhizosphere-bacteria-to-improve-phytoremediation-of-arsenic-contaminated-industrial-soils-by-autochthonous-betula-celtiberica
#15
Victoria Mesa, Alejandro Navazas, Ricardo González-Gil, Aida González, Nele Weyens, Béatrice Lauga, Jose Luis R Gallego, Jesús Sánchez, Ana Isabel Peláez
The aim of the study was to investigate the potential of indigenous arsenic-tolerant bacteria to enhance arsenic phytoremediation by autochthonous pseudometallophyte Betula celtiberica The first goal was to perform an initial analysis of the entire rhizosphere and endophytic bacterial communities of the above-named accumulator plant, including the cultivable bacterial species. B. celtiberica's microbiome was dominated by taxa related to Flavobacteriales, Burkholderiales, and Pseudomonadales, specially the Pseudomonas and Flavobacterium genera...
February 10, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28187398/phosphorus-deficiency-modifies-as-translocation-in-the-halophyte-plant-species-atriplex-atacamensis
#16
Delphine Vromman, Juan-Pablo Martínez, Stanley Lutts
Most arsenic in surface soil and water exists primarily in its oxidized form, as arsenate (As(V); AsO4(3-)), which is an analog of phosphate (PO4(3-)). Arsenate can be taken up by phosphate transporters. Atriplex atacamensis Phil. is native to northern Chile (Atacama Desert), and this species can cope with high As concentrations and low P availability in its natural environment. To determine the impact of P on As accumulation and tolerance in A. atacamensis, the plants were cultivated in a hydroponic system under four treatments: no As(V) addition with 323µM phosphate (control); 1000µM As(V) addition with 323µM phosphate; no As(V) and no phosphate; 1000µM As(V) addition and no phosphate...
February 7, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28185733/evaluating-the-potential-health-risk-of-toxic-trace-elements-in-vegetables-accounting-for-variations-in-soil-factors
#17
Yang Yang, Weiping Chen, Meie Wang, Yanling Li, Chi Peng
Vegetable crop consumption is one of the main sources of dietary exposure to toxic trace elements (TEs). A paired survey of soil and vegetable samples was conducted in 589 agricultural sites in the Youxian prefecture, southern China, to investigate the effect of soil factors on the accumulation of arsenic, cadmium, mercury, and lead in different vegetables. A site-specific model was developed to estimate the health risk from vegetable consumption. The TE concentration varied in different plant species, and rape can be cultivated in contaminated areas for its potential use in restricting the transfer of TE from soil to edible plant parts...
April 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28167352/evaluation-of-amendments-to-reduce-arsenic-and-antimony-leaching-from-co-contaminated-soils
#18
Steven J Doherty, Matthew K Tighe, Susan C Wilson
Co-contamination of soils with arsenic (As) and antimony (Sb) presents unique challenges for risk management. In this study a sequence of leaching experiments evaluated zero valent iron powder, ferrihydrite, ferric chloride, aluminium and manganese oxides, and kaolinite for As and Sb immobilisation in co-contaminated soils. Iron based amendments were most effective for the reduction of As and Sb in leachate in a column leaching study. Over 48 h zero valent iron powder and ferrihydrite applied at 3% (w/w dry weight) were most efficient, decreasing total As and Sb leachate concentrations by more than 80%...
May 2017: Chemosphere
https://www.readbyqxmd.com/read/28165031/sediment-biomarker-bacterial-community-characterization-of-high-arsenic-aquifers-in-jianghan-plain-china
#19
Hengpeng Ye, Zeyu Yang, Xiang Wu, Jingwen Wang, Dongyun Du, Jian Cai, Kangle Lv, Huiyun Chen, Jingkun Mei, Mengqi Chen, Hong Du
Representative biomarkers (e.g., n-alkanes), diversity and microbial community in the aquifers contaminated by high concentration of arsenic (As) in different sediment depth (0-30 m) in Jianghan Plain, Hubei, China, were analyzed to investigate the potential mechanism of As enrichment in groundwater. The concentration of As was abundant in top soil and sand, but not in clay. The analysis of the distribution of n-alkanes, CPI values, and wax to total n-alkane ratio (Wax(n)%) indicated that the organic matter (OM) from fresh terrestrial plants were abundant in the shallow sediment...
February 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28160172/arsenic-uptake-accumulation-and-toxicity-in-rice-plants-possible-remedies-for-its-detoxification-a-review
#20
Hafiz Faiq Bakhat, Zahida Zia, Shah Fahad, Sunaina Abbas, Hafiz Mohkum Hammad, Ahmad Naeem Shahzad, Farhat Abbas, Hesham Alharby, Muhammad Shahid
Arsenic (As) is a toxic metalloid. Serious concerns have been raised in literature owing to its potential toxicity towards living beings. The metalloid causes various water- and food-borne diseases. Among food crops, rice contains the highest concentrations of As. Consuming As-contaminated rice results in serious health issues. Arsenic concentration in rice is governed by various factors in the rhizosphere such as availability and concentration of various mineral nutrients (iron, phosphate, sulfur and silicon) in soil solution, soil oxidation/reduction status, inter-conversion between organic and inorganic As compounds...
February 3, 2017: Environmental Science and Pollution Research International
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