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cadmium tolerance

Waseem Bashir, Sumera Anwar, Qiang Zhao, Iqbal Hussain, Futi Xie
Recent climatic changes and low water availability due to unpredictable precipitation have reduced the productivity of soybean (Glycine max [L.] Merr.) cultivars. Limited information is available on how drought affects the accumulation and translocation of cadmium (Cd) by affecting soybean root. In this study, we investigated the effect of polyethylene glycol (PEG; 5% and 10%)-induced drought and Cd (0.2 and 0.5 mg L-1 ) stresses on soybean root morphology, Cd uptake and gene expression; plants not exposed to these stress (0% PEG and 0 mg L-1 Cd) served as a control...
March 16, 2019: Ecotoxicology and Environmental Safety
Irfan Ullah Khan, Justice Kipkoir Rono, Bai Qing Zhang, Xue Song Liu, Meng Qi Wang, Lei Lei Wang, Xue Chun Wu, Xi Chen, Hong Wei Cao, Zhi Min Yang
HPP (heavy metal associated plant protein) and HIPP (heavy metal associated isoprenylated plant protein) are a group of metal-binding metallochaperones playing crucial roles in metal homeostasis and detoxification. Up to now, only few of them have been functionally identified in plants. Here, we identified 54 HPP and HIPP genes in rice genome. Analysis of the transcriptome datasets of the rice genome exposed to cadmium (Cd) revealed 17 HPP/HIPP genes differentially expressed, with 11 being upregulated (>2 fold change, p < 0...
March 14, 2019: Ecotoxicology and Environmental Safety
Gang Liang, Wenwen Gong, Bingru Li, Jimin Zuo, Ligang Pan, Xinhui Liu
Consumption of foodstuffs is the most likely route for human exposure to heavy metals. This study was designed to investigate the toxic metals (cadmium (Cd), lead (Pb), chromium (Cr), arsenic (As), and mercury (Hg)) concentrations in different foodstuffs (cereals, vegetables, fruits, fish, and meat) and then estimate the potential health risks of toxic metals via consumption to the local residents in Beijing, China. Most of the selected toxic metal levels in the foodstuffs were lower than the maximum allowable concentrations of Pb, Cr, Cd, As, and Hg for Chinese foodstuffs recommended in the China National Food Safety Standard...
March 13, 2019: International Journal of Environmental Research and Public Health
Tiago de Sousa Leite, Francisco Antonio Monteiro
In order to grow and effectively uptake and accumulate cadmium (Cd), plants used for phytoextraction have to cope with toxicity, which may be influenced by the supply of nitrate (NO3 - ) and ammonium (NH4 + ). Thus, we evaluated the effect of these nitrogen forms on the photosynthetic and antioxidant enzyme activities of Panicum maximum cv. Tanzania (tanzania guinea grass) under Cd stress. Plants were grown in nutrient solution under greenhouse conditions and subjected to a 3 × 3 factorial experiment. They were supplied with three NO3 - /NH4 + ratios (100/0, 70/30 and 50/50) and exposed to three Cd rates (0...
March 11, 2019: Ecotoxicology and Environmental Safety
Chenni Lu, Lingxiao Zhang, Zhong Tang, Xin-Yuan Huang, Jian Feng Ma, Fang-Jie Zhao
BACKGROUND: Considerable proportions of rice grains produced in some areas in southern China contain high concentrations of cadmium (Cd), leading to unsafe levels of dietary Cd intake. Cultivars of Indica rice, widely grown in southern China, are particularly prone to high Cd accumulation in the grain. Effective methods are needed to decrease Cd accumulation in Indica rice. METHODS: OsHMA3, encoding a tonoplast Cd transporter, was overexpressed in an elite Indica rice cultivar (Zhongjiazao 17) driven by CaMV 35S promoter...
March 8, 2019: Environment International
Abin Sebastian, Ashwini Nangia, M N V Prasad
Magnetite nanoparticles use for the remediation of toxic metal ions. Therefore, the scope of green synthesis of magnetite nanoparticles from Hevea bark extract, and application of these particles for the environmental remediation of Cd and Na tested. Mixing of 10.0 mL each bark extract (1.0 g in 25.0 mL H2 O) and iron solution (10.0 mM FeCl3 and 5.0 mM FeCl2 ) resulted formation of semicrystalline magnetite nanoparticles having magnetic saturation at 104 G. The particles characterized with the help of scanning electron microscopy, energy dispersive spectroscopy, Uv-vis spectroscopy, vibrating sample magnetometry, powder X-Ray diffraction, Fourier-transform infrared spectroscopy, and differential thermal analysis coupled with thermogravimetry...
March 6, 2019: Journal of Hazardous Materials
Ramin Bahmani, DongGwan Kim, JongDuk Na, Seongbin Hwang
Hemoglobin (Hb) proteins are ubiquitous in plants, and non-symbiotic class 1 hemoglobin (Hb1) is involved in various biotic and abiotic stress responses. Here, the expression of the tobacco ( Nicotiana tabacum ) hemoglobin gene NtHb1 in Arabidopsis ( Arabidopsis thaliana ) showed higher cadmium (Cd) tolerance and lower accumulations of Cd, nitric oxide (NO), and reactive oxygen species (ROS) like hydrogen peroxide (H2 O2 ). NtHb1 -expressing Arabidopsis exhibited a reduced induction of NO levels in response to Cd, suggesting scavenging of NO by Hb1...
2019: Frontiers in Plant Science
Shiliang Liu, Shafaqat Ali, Rongjie Yang, Jianjun Tao, Bo Ren
The identification of hyperaccumulators is a key step for the phytoextraction of contaminated soils. However, few cadmium (Cd) hyperaccumulators have been identified in the plant kingdom. In our previous field investigations, Lantana camara L. plants exhibited some traits of hyperaccumulators. To confirm whether this species is a Cd hyperaccumulator, laboratory dose-gradient experiments and field sample analysis experiments were first designed and implemented in an integrated manner. The results showed that lantana plants did not exhibit any visible damage or marked reduction in shoot biomass when grown in Cd-contaminated soil with less than 100 mg kg-1 Cd...
March 5, 2019: Journal of Hazardous Materials
Sudharsanam Abinandan, Suresh R Subashchandrabose, Kadiyala Venkateswarlu, Isiri Adhiwarie Perera, Mallavarapu Megharaj
Two acid-tolerant microalgae, Desmodesmus sp. MAS1 and Heterochlorella sp. MAS3, originally isolated from non-acidophilic environment, were tested for their ability to withstand higher concentrations of an invasive heavy metal, cadmium (Cd), at an acidic pH of 3.5 and produce biomass rich in biodiesel. The growth analysis, in terms of chlorophyll, revealed that strain MAS1 was tolerant even to 20 mg L-1 of Cd while strain MAS3 could withstand only up to 5 mg L-1 . When grown in the presence of 2 mg L-1 , a concentration which is 400-fold higher than that usually occurs in the environment, the microalgal strains accumulated >58% of Cd from culture medium at pH 3...
March 1, 2019: Bioresource Technology
Ihsan Ullah, Bassam Oudh Al-Johny, Khalid M S Al-Ghamdi, Hind A A Al-Zahrani, Yasir Anwar, Ahmad Firoz, Naser Al-Kenani, Mohammed Ali Ahmed Almatry
Cadmium (Cd) is a toxic heavy metal and an abiotic stressor to plants; however, inoculation of endophytic bacteria can raise resistance in plants against Cd, as well as improve plant growth. In the present study, two endophytic bacterial strains were isolated from Solanum nigrum, identified as Serratia sp. IU01 and Enterobacter sp. IU02 by 16S DNA sequencing. Both IU01 and IU02 were tolerant up to 9.0 mM of Cd in culture broth and successive increase in Cd concentration from 0 mM to 9.0 mM, led to an increase in the SOD enzyme activity of the isolates...
February 28, 2019: Ecotoxicology and Environmental Safety
Jingjing Kong, Jing Jin, Qing Dong, Jianle Qiu, Yangyang Li, Yuehan Yang, Yutian Shi, Weina Si, Longjiang Gu, Feiyang Yang, Beijiu Cheng, Yuancheng Peng
Ubiquitin-Specific Protease16 (UBP16) has been described involved in cadmium stress and salt stress in Arabidopsis, however nothing is known about the functions of its homologs in maize. In this study, we investigate the functions of ZmUBP15, ZmUBP16 and ZmUBP19, three Arabidopsis UBP16 homologs in maize. Our results indicate that ZmUBP15, ZmUBP16 and ZmUBP19 are ubiquitously expressed throughout plant development, and ZmUBP15, ZmUBP16 and ZmUBP19 proteins are mainly localized in plasma membrane. Complementation analyses show that over-expression of ZmUBP15 or ZmUBP16 can rescue the defective phenotype of ubp16-1 in cadmium stress...
March 2019: Plant Science: An International Journal of Experimental Plant Biology
Sheng Xu, Bo Li, Pin Li, Xingyuan He, Wei Chen, Kun Yan, Yan Li, Yijing Wang
Pollution with both heavy metal and ground-level ozone (O3 ) has been steadily increasing, especially in the cities with heavy industry. Little information is known about their combined impacts on urban tree. This study was aimed at characterizing the interactive effects of soil cadmium (Cd) addition and O3 fumigation on visible injury and growth, photosynthesis, oxidative stress, antioxidant enzyme activities, abscisic acid (ABA) content and bioaccumulation of Cd in one-year-old Populus alba 'Berolinensis' saplings by using open top chambers in Shenyang city with developed heavy industry, Northeast China...
February 25, 2019: Ecotoxicology and Environmental Safety
Maria Greco, Claudio A Sáez, Rodrigo A Contreras, Fernanda Rodríguez-Rojas, M Beatrice Bitonti, Murray T Brown
In this investigation, we assessed the effects of Cu and/or Cd excess on physiological and metabolic processes of the widespread seagrass Zostera marina. Adult were exposed to low Cd and Cu (0.89 and 0.8 μM, respectively) and high Cd and Cu (8.9 and 2.4 μM, respectively) for 6 d at: Control conditions; low Cu; high Cu; low Cd; high Cd; low Cd and low Cu; and high Cd and high Cu. Photosynthetic performance decreased under single and combined treatments, although effects were more negative under Cu than Cd...
February 19, 2019: Chemosphere
Reda E Abdelhameed, Rabab A Metwally
Owing to the realization of the harmful effect of cadmium on the environment and plants and as the plants are sessile organisms, they need to increase the protective mechanisms to cope with Cd stress. Inoculation the plant with soil microbes at the place of their growing is an important strategy to support the plants against stresses. In this study, trigonella plants were inoculated with arbuscular mycorrhizal (AM) fungi under different CdCl2 concentrations (0, 2.25, and 6.25 mM). AM inoculation increased growth parameters, chlorophyll, and protein contents...
February 28, 2019: International Journal of Phytoremediation
Yuting Gao, Lianying Fang, Xiangxing Wang, Ruoni Lan, Meiyan Wang, Gang Du, Wenqiang Guan, Jianfu Liu, Margaret Brennan, Hongxing Guo, Charles Brennan, Hui Zhao
Oxidative stress leads to various diseases, including diabetes, cardiovascular diseases, neurodegenerative diseases, and even cancer. The dietary flavonol glycoside, hyperoside (quercetin-3- O -galactoside), exerts health benefits by preventing oxidative damage. To further understand its antioxidative defence mechanisms, we systemically investigated the regulation of hyperoside on oxidative damage induced by hydrogen peroxide, carbon tetrachloride, and cadmium in Saccharomyces cerevisiae . Hyperoside significantly increased cell viability, decreased lipid peroxidation, and lowered intracellular reactive oxygen species (ROS) levels in the wild-type strain (WT) and mutants gtt1∆ and gtt2∆ ...
February 22, 2019: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Soumitra Nath, Bibhas Deb, Indu Sharma
Heavy metals, also regarded as toxic metals, are the important environmental pollutants that affect all forms of life. Accumulation of toxic metals in plants results in various biochemical, physiological and structural disturbances, leading to inhibited growth and sometimes plant death. Toxic metal contamination disturbs the soil ecology as well as the agricultural productivity. Several indigenous microbes can withstand the effect of toxic metal and play a vital role in the revival of tarnished soil. In the present study, soil samples were collected from contaminated crop field of Cachar district of Assam, India...
June 2018: International Microbiology: the Official Journal of the Spanish Society for Microbiology
Birendra Singh Yadav, Ashutosh Mani
bHLH family of transcription factors play important role in regulating many cellular and physiological functions in plants. These proteins are also known to be involved in response to several abiotic stress types. Cicer arietinum is an important source of protein in food across the globe. Considerable differential expression in the bHLH family of proteins during heavy metal exposure in Cicer arietinum was observed by microarray data analysis. The study aimed to construct a Pearson coefficient correlation based network of bHLH coding genes in the plant...
January 2019: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
Rongfei Wei, Qingjun Guo, Liyan Tian, Jing Kong, Yang Bai, Chukwunonso Peter Okoli, Liyuan Wang
Cadmium (Cd) pollution of the soil is an important global environmental issue owing to its great toxicity. The study of metal isotope fractionation is a novel technique that could be used to identify and quantify metal uptake and transport mechanisms in plant. In this study, cadmium tolerant Ricinus communis and hyperaccumulator Solanum nigrum have been cultured in different Cd concentration nutrient solutions. The Cd isotope values, metal elements concentrations in the organs (root, stem and leaf) in the two plant species have been measured during the growth periods (10d, 15d, 20d, 25d, and 30d)...
February 22, 2019: Ecotoxicology and Environmental Safety
Jan Sácký, Vojtěch Beneš, Jan Borovička, Tereza Leonhardt, Pavel Kotrba
Hebeloma mesophaeum is an ectomycorrhizal fungus frequently associated with metal disturbed environments. In this work, we examined Ag, Cd, and Zn tolerance of H. mesophaeum isolates from heavy metal-polluted (isolate Prib) and clean (isolate Rez) sites. Both mycelia showed essentially the same level of Ag and Zn tolerance, but Prib was more Cd tolerant. In short-term exposures, Prib accumulated slightly less Cd than Rez. Size exclusion chromatography of cell-free extracts and fluorescence microscopy of hyphae with a Cd-specific fluorescent tracer revealed that substantial proportion of Cd was contained in the vacuoles in both isolates...
March 2019: Fungal Biology
Min Chen, Yongfei Gao, Xiaoxue Bian, Jianfeng Feng, Weiqi Ma, Lin Zhu
Aquatic organisms are often exposed to time-varied concentrations of contaminants due to pulsed inputs in natural water. Traditional toxicology experiments are usually carried out in a constant exposure pattern, which is inconsistent with the actual environment. In this study, a refined toxicokinetic-toxicodynamic (TK-TD) model was used to study the toxic effects of Pb and Cd on zebrafish larvae under three pulse exposures with 2, 4, and 6 h, respectively. The parameter sensitivity analysis showed that JM, max had the greatest impact on the output of the model...
February 18, 2019: Chemosphere
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