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Arsenic plant

Bui Thi Kim Anh, Nguyen Ngoc Minh, Nguyen Thi Hoang Ha, Dang Dinh Kim, Nguyen Trung Kien, Nguyen Quang Trung, Tran Thien Cuong, Luu Thai Danh
In field survey, Pteris vittata and Pityrogramma calomelanos were only found in arsenic (As) contaminated areas with soil pH 7.2-8.8 and 2.3-4.2, respectively. In the first pot experiment, two fern species were grown on the soil amended with 300 mg kg-1 As at soil pH of 5.1, 7.2 and 9. P. calomelanos survived all pH treatments, and had the highest frond As concentration and soil As removal efficiency at soil pH 5.1. All P. vittata plants were dead at soil pH 5.1. P. vittata had higher frond As concentration, biomass and the amount of As removed from the soil than those of P...
March 20, 2018: Bulletin of Environmental Contamination and Toxicology
Nneka Alozie, Natalie Heaney, Chuxia Lin
A batch experiment was conducted to examine the effects of biochar on the behaviour of soil-borne arsenic and metals that were mobilized by three low-molecular-weight organic acids. In the presence of citric acid, oxalic acid and malic acid at a molar concentration of 0.01M, the surface of biochar was protonated, which disfavours adsorption of the cationic metals released from the soil by organic acid-driven mobilization. In contrast, the oxyanionic As species were re-immobilized by the protonated biochar effectively...
March 2, 2018: Science of the Total Environment
Soumik Mitra, Krishnendu Pramanik, Anumita Sarkar, Pallab Kumar Ghosh, Tithi Soren, Tushar Kanti Maiti
Bacteria-mediated plant growth promotion and bioremediation of heavy metal containing soil is a widely accepted eco-friendly method. The present study is aimed to screen out cadmium resistant bacterial strain from metal contaminated rice rhizosphere and evaluate its effects on the growth of rice seedlings under cadmium stress. Among four different isolates (designated as S1, S2, S3 and S5), the S2 isolate was screened on the basis of different PGP traits and multi heavy metal resistance (minimum inhibitory concentration for cadmium, lead and arsenic were 3500, 2500 and 1050 µg/ml respectively)...
March 15, 2018: Ecotoxicology and Environmental Safety
Yue Cao, Dan Sun, Jun-Xiu Chen, Hanyi Mei, Hao Ai, Guohua Xu, Yanshan Chen, Lena Q Ma
Phosphorus is an important nutrient for plant growth and is acquired by plants mainly as phosphate (P). Phosphate transporters (Phts) are responsible for P and arsenate (AsV) uptake in plants including arsenic (As) hyperaccumulator Pteris vittata. It is efficient in AsV uptake and P utilization, but P uptake in P. vittata is largely unknown. In this study, a P. vittata Pht, PvPht1;2, was identified and cloned. After transforming it into tobacco (N. tabacum), three independent transgenic lines (Ox1, Ox10, and Ox21) were studied...
March 14, 2018: Environmental Science & Technology
Suchi Srivastava, Sonal Srivastava, Vidisha Bist, Surabhi Awasthi, Reshu Chauhan, Vasvi Chaudhry, Poonam C Singh, Sanjay Dwivedi, Abhishek Niranjan, Lalit Agrawal, Puneet Singh Chauhan, Rudra Deo Tripathi, Chandra Shekhar Nautiyal
Rice grown in arsenic (As) contaminated areas contributes to high dietary exposure of As inducing multiple adverse effects on human health. The As contamination and application of phosphate fertilizers during seedling stage creates a high P and As stress condition. The flooded paddy fields are also conducive for algal growth and microbial activity. The present study proposes potential role of microalgae, Chlorella vulgaris (CHL) and bacteria, Pseudomonas putida (RAR) on rice plant grown under excess As and phosphate (P) conditions...
February 23, 2018: Journal of Hazardous Materials
Yanan Wan, Aboubacar Younoussa Camara, Qingqing Huang, Yao Yu, Qi Wang, Huafen Li
The accumulation of arsenic (As) in rice grain is a potential threat to human health. Our study investigated the possible mediatory role of selenite fertilization on As uptake and accumulation by rice (Oryza sativa L.) under different water management regimes (aerobic or flooded) in a pot experiment. Soil solutions were also extracted during the growing season to monitor As dynamics. Results showed that As contents in the soil solutions, seedlings, and mature rice were higher under flooded than under aerobic water management...
March 9, 2018: Ecotoxicology and Environmental Safety
Muhammad A Farooq, Kangni Zhang, Faisal Islam, Jian Wang, Habib U R Athar, Aamir Nawaz, Zafar Ullah Zafar, Jianxiang Xu, Weijun Zhou
Brassica napus plants exposed to 200 μM arsenic (As) exhibited high-level of stress condition, which led to inhibit growth, enhanced lipid peroxidation, and disrupted cellular ultra-structures. Exogenous application of methyl jasmonate (MeJA) alleviated the As-induced oxidative stress and improves the plant growth and photosynthesis. In this study, we investigated changes in the B. napus leaf proteome in order to identify molecular mechanisms involved in MeJA -induced As tolerance. Our study identified 177 proteins were differentially expressed in cultivar ZS 758; while 200 differentially expressed proteins were accumulated in zheda 622, when exposed to As alone and MeJA+As treatments, respectively...
March 12, 2018: Proteomics
Javed Nawab, Junaid Ghani, Sardar Khan, Wang Xiaoping
Mining activity releases toxic metals (TMs) into the soil ecosystem and creates serious problems for the environment and human beings due to their adverse eco-toxilogical impacts. Currently, several remediation techniques can be used to immobilize TMs within contaminated soil. The present study focuses on the application of different organic amendments biochar (B), farmyard manure (FYM) and peat moss (PTM) - at different application rates (1%, 2% and 5%) in mining-impacted agricultural soil to immobilize TMs (Ni, Cr, As, Zn, Cd and Pb) and minimize their bioaccumulation in pea (Pisum sativum) and chili (Capsicum annuum) and the associated human health risk...
March 8, 2018: Journal of Environmental Management
Md Shahedur Rahman, Polsh Kumar Biswas, Syed Mahfuz Al Hasan, Mohammad Mahfuzur Rahman, S H Lee, Ki-Hyun Kim, Shaikh Mizanur Rahman, Md Rezuanul Islam
In this research, heavy metal accumulation pattern was investigated using the data measured from the soil, paddy plants, and irrigation water samples in Jessore district in Bangladesh with the aid of principal component analysis. A total of 28 samples representing farmland soil and irrigation water along with paddy plant were collected from 28 locations in the Jessore district in November 2016. In agricultural soil, arsenic (As) and nickel (Ni) were found 2.78 and 1.11 times more concentrated than their background values...
March 8, 2018: Environmental Monitoring and Assessment
Wen Zheng, Zheng-Yan Zhong, Hong-Bin Wang, Hai-Juan Wang, Dong-Mo Wu
A hydroponic experiment was conducted to investigate the effects of oxalic acid (OA) on arsenic (As) uptake and the physiological responses of Hydrilla verticillata exposed to 3 mg L-1 of As in different forms. Plant As(III) uptake was significantly increased by 200-2000 µg L-1 OA. However, an increase of As(V) uptake was only shown with 1000 µg L-1 OA, and no significant difference was observed with dimethylarsinate treatment. Peroxidase and catalase activities, and the contents of photosynthetic pigments, soluble sugar and proline, were significantly increased by 1000 µg L-1 OA during As(III) treatment...
March 6, 2018: Bulletin of Environmental Contamination and Toxicology
Tapsi Shukla, Ria Khare, Smita Kumar, Deepika Lakhwani, Deepika Sharma, Mehar Hasan Asif, Prabodh Kumar Trivedi
Arsenic (As) is a ubiquitous metalloid and a health hazard to millions of people worldwide. The presence of As in groundwater poses a threat as it not only affects crop productivity but also contaminates food chain. Therefore, it is essential to understand molecular mechanisms underlying uptake, transport and accumulation of As in plants. In recent past, natural variation in Arabidopsis thaliana has been utilized to understand molecular and genetic adaptation under different stresses. In this study, responses of Arabidopsis accessions were analyzed at biochemical and molecular levels towards arsenate [As(V)] stress...
February 16, 2018: Journal of Hazardous Materials
Bruce G Marshall, Marcello M Veiga, Robert J Kaplan, Rebecca Adler Miserendino, Gary Schudel, Bridget A Bergquist, Jean R D Guimarães, Luis G S Sobral, Carolina Gonzalez-Mueller
In Portovelo in southern Ecuador, 87 gold processing centers along the Puyango-Tumbes River produce an estimated 6 tonnes of gold per annum using a combination of mercury amalgamation and/or cyanidation and processing poly-metallic ores. We analysed total Hg, Hg isotopes, total arsenic, cadmium, copper, lead and zinc in water and sediment along the Puyango in 2012-2014. The highest total mercury (THg) concentrations in sediments were found within a 40 km stretch downriver from the processing plants, with levels varying between 0...
March 1, 2018: Environmental Science. Processes & Impacts
Ying Ji, Adrien Mestrot, Rainer Schulin, Susan Tandy
Used as a hardening agent in lead bullets, antimony (Sb) has become a major contaminant in shooting range soils of some countries including Switzerland. Soil contamination by Sb is also an environmental problem in countries with Sb-mining activities such as China and Bolivia. Because of its toxicity and relatively high mobility, there is concern over the risk of Sb transfer from contaminated soils into plants, and thus into the food chain. In particular there is very little information on the environmental behavior of methylated antimony, which can be produced by microbial biomethylation of inorganic Sb in contaminated soils...
2018: Frontiers in Plant Science
Rasika M Potdukhe, Priyanka Bedi, Bijaya K Sarangi, Ram A Pandey, Sanjog T Thul
Hyperaccumulation of arsenic (As) by brake fern Pteris vittata has been described as an important genetic trait that provides an option for development of a sustainable phytoremediation process for As mitigation. Accumulation of very high concentration of arsenic in above-ground tissues may be the result of arsenic vacuole compartmentalization, but the mechanism(s) of arsenic uptake and transport by underground tissues are largely unknown. In this study, we made an attempt towards understanding the molecular mechanism of As hyperaccumulation in this plant...
March 2018: Journal of Biosciences
Lei Wang, Guangjie Chen, Wengang Kang, Jiaoyuan Wang, Yuanyuan Liu, Li Chen
It has been well established that regional patterns of atmosphere-borne polycyclic aromatic hydrocarbons (PAHs) and trace metals were predominantly associated with the trajectory of socio-economic development; however, they could be potentially modulated by anthropogenic fingerprint of local sources such as industrial spill. Here, we established historical pollution data of both PAHs and trace metals from a well-dated sediment core from Yangzong Lake of Southwest China, which experienced a severe tailing leakage accident derived from a zinc concentrate smelting plant in 2007, aiming to evaluate the heterogeneity in their temporal trajectories and their sources of contamination in the context of regional deposition patterns...
February 26, 2018: Environmental Science and Pollution Research International
Fenglin Deng, Naoki Yamaji, Jian Feng Ma, Sang-Kyu Lee, Jong-Seong Jeon, Enrico Martinoia, Youngsook Lee, Won-Yong Song
Arsenic (As) is a poisonous element that causes severe skin lesions and cancer in humans. Rice (Oryza sativa L.) is a major dietary source of As in humans who consume this cereal as a staple food. We hypothesized that increasing As vacuolar sequestration would inhibit its translocation into the grain and reduce the amount of As entering the food chain. We developed transgenic rice plants expressing two different vacuolar As sequestration genes, ScYCF1 and OsABCC1, under the control of the RCc3 promoter in the root cortical and internode phloem cells, along with a bacterial γ-glutamylcysteine synthetase driven by the maize UBI promoter...
February 26, 2018: Plant Biotechnology Journal
Jian-Hong Liang, Pan-Pan Liu, Zheng Chen, Guo-Xin Sun, Hong Li
Arsenic (As) in paddy fields is deteriorating food security and human health through rice ingestion. Rice is the dominant food source of arsenic exposure to half of the world's population. Therefore, an in situ effective method for As risk evaluation in paddy soil is strongly needed to avoid As exposure through rice ingestion. Herein, we developed a rapid analytical methodology for determination of As in plant tissues using field portable X-ray fluorescence spectrometry (FP-XRF). This method was applied to rice roots in order to evaluate the As contamination in paddy soils...
February 2018: Journal of Environmental Sciences (China)
Jinjin Wang, Xibai Zeng, Hao Zhang, Yongtao Li, Shizhen Zhao, Lingyu Bai, Shiming Su, Yanan Wang
The mobility of arsenic (As) in soil depends on its sorption/desorption processes on soil particles. Plant uptake locally lowers As concentration in soil pore water, which would trigger resupplies of As from soil solid phase. To better understand the fate of As in soil system after its inputs into soil and its subsequent dynamic processes, diffusive gradients in thin films (DGT) technique along with DGT-induced fluxes in soils (DIFS) model were introduced to study the kinetic information of As in soils, including its response time (TC ) and resupply rate constant (k-1 )...
February 24, 2018: Environmental Science and Pollution Research International
Channratha Prum, Rujira Dolphen, Paitip Thiravetyan
In this study, Echinodorus cordifolius was the best plant for arsenic removal compared to Cyperus alternifolius, Acrostichum aureum and Colocasia esculenta. Under arsenic stress, the combination of E. cordifolius with microbes (Bacillus subtilis and Arthrobacter creatinolyticus) was investigated. It was found that A. creatinolyticus, a native microbe, can endure arsenic toxicity, produce higher indole-3 acetic acid (IAA) and ammonium production better than B. subtilis. Interestingly, E. cordifolius-endophytic A...
February 22, 2018: Journal of Environmental Management
Brenda Román-Ponce, Juan Ramos-Garza, Ivan Arroyo-Herrera, Jessica Maldonado-Hernández, Yanelly Bahena-Osorio, María Soledad Vásquez-Murrieta, En Tao Wang
Arsenic contamination is an important environmental problem around the world since its high toxicity, and bacteria resist to this element serve as valuable resource for its bioremediation. Aiming at searching the arsenic-resistant bacteria and determining their resistant mechanism, a total of 27 strains isolated from roots of Prosopis laevigata and Spharealcea angustifolia grown in a heavy metal-contaminated region in Mexico were investigated. The minimum inhibitory concentration (MIC) and transformation abilities of arsenate (As5+ ) and arsenite (As3+ ), arsenophore synthesis, arsenate uptake, and cytoplasmatic arsenate reductase (arsC), and arsenite transporter (arsB) genes were studied for these strains...
February 23, 2018: Archives of Microbiology
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