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cadmium tolerance

Quratulan Ahmed, Semra Benzer, Qadeer Mohammad Ali
In this study, muscle samples gathered from Largehead hairtail (Trichiurus lepturus Linneaus, 1758) and Savali hairtail [Lepturacanthus savala (Cuvier, 1829)] from the Karachi Fish Harbour, Pakistan were analyzed to determine heavy metal concentrations (iron [Fe], zinc [Zn], copper [Cu], manganese [Mn], lead [Pb] and cadmium [Cd]) between January and December 2016. All samples were analyzed using the AAnalyst 700 Flame Atomic Absorption Spectrophotometer. It was observed that the average measured level of Fe, Zn, Cu, Mn, Pb and Cd in muscle were 77...
August 16, 2018: Bulletin of Environmental Contamination and Toxicology
Wenling Ye, Guifeng Guo, Fan Wu, Ting Fan, Hongjuan Lu, Haiyan Chen, Xuede Li, Youhua Ma
Cadmium (Cd) is considered to be the most phytotoxic heavy metal pollutant. The selection of castor bean cultivars with Cd tolerance and the exploration of the physiological mechanisms involved in Cd tolerance are critical steps for improving phytoremediation performance. In this study, a hydroponic experiment was used to investigate variations in Cd transportation, chelation, and subcellular distribution in two different castor bean cultivars, namely JX-22 and ZB-9. Both cultivars had high tolerance index scores, indicating that both cultivars were tolerant to Cd...
August 13, 2018: Environmental Science and Pollution Research International
József Lehel, András Bartha, Dávid Dankó, Katalin Lányi, Péter Laczay
Heavy-metal content (arsenic, cadmium, lead and mercury) was investigated and evaluated in shellfish, oysters and squids. The samples were collected weekly for 20 weeks from a fishery product market in Hungary. The concentration of heavy metals was measured by Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES) analysis after sample preparation. The results were analysed statistically by one-way ANOVA method. The average concentration of arsenic (3.01 ± 1.46 mg kg-1 ) in shellfish was significantly higher (p < 0...
August 13, 2018: Food Additives & Contaminants. Part B, Surveillance
Danli Song, Zhihua Lin, Yongjun Yuan, Guang Qian, Chenghua Li, Yongbo Bao
The blood clam, Tegillarca granosa , is a benthic filter feeder with a strong capacity to accumulate and tolerate cadmium (Cd). In our previous study, DPEP1 was shown to be significantly up-regulated under Cd stress based on proteomic analysis. To investigate whether DPEP1 is involved in Cd-induced response, the function of DPEP1 in T. granosa was investigated by integrated molecular and protein approaches. Rapid amplification cDNA end (RACE) assay was established to achieve the complete cDNA sequence of DPEP1 from T...
2018: Frontiers in Physiology
Bharti Thakur, Rajiv Yadav, Laurence Fraissinet-Tachet, Roland Mermeisse, M Sudhakara Reddy
Release of heavy metals into the soil pose a significant threat to the environment and public health because of their toxicity accumulation in the food chain and persistence in nature. The potential of soil microbial diversity of cadmium (Cd) contaminated site was exploited through functional metatranscriptomics by construction of cDNA libraries A (0.1-0.5 kb), B (0.5-1.0 kb), and C (1-4 kb) of variable size, from the eukaryotic mRNA. The cDNA library B was further screened for cadmium tolerant transcripts through yeast complementation system...
August 2, 2018: Journal of Microbiological Methods
Shijuan Han, Xiaoning Li, Erick Amombo, Jinmin Fu, Yan Xie
Cadmium (Cd) pollution is becoming increasingly prevalent, posing a global environmental hazard due to its negative effects on plants growth and human health. Phytoremediation is a green technology that involves uptake of Cd from the soil by a combination of plants and associated microbes. The objective of this study was to investigate the role of Aspergillus aculeatus in perennial ryegrass Cd tolerance. This fungus produced indole-3-acetic acid, siderophores, and 1-aminocyclopropane-1-carboxylate deaminase...
2018: Frontiers in Microbiology
Chunxiao Xu, Tao Sun, Shubin Li, Lei Chen, Weiwen Zhang
Background: Cadmium has been a significant threat to environment and human health due to its high toxicity and wide application in fossil-fuel burning and battery industry. Cyanobacteria are one of the most dominant prokaryotes, and the previous studies suggested that they could be valuable in removing Cd2+ from waste water. However, currently, the tolerance to cadmium is very low in cyanobacteria. To further engineer cyanobacteria for the environmental application, it is thus necessary to determine the mechanism that they respond to high concentration of cadmium...
2018: Biotechnology for Biofuels
Ying-Li Ma, Hui-Fang Wang, Ping Wang, Chao-Guang Yu, Si-Qian Luo, Yu-Feng Zhang, Yin-Feng Xie
The T.118 and T.406 seedlings showed strong adaptability under Cd concentrations ≤ 50 µM. The mechanisms of photoprotection in T.118 and T.406 differed in high-Cd concentrations. To explore the physiological response characteristics of Taxodium hybrids to cadmium (Cd) stress and provide basis for screening of Cd-tolerant species, the hydroponic cultivation of T.118 and T.406 seedlings was conducted to demonstrate the effects of Cd stress on seedling growth, antioxidant system, and chlorophyll fluorescence parameters...
July 28, 2018: Plant Cell Reports
Rafaella Regina Alves Peixoto, Andrea Oliveira, Solange Cadore
An evaluation of the exposition of cadmium and chromium via chocolate drink powder consumption was conducted. The element levels were determined in 34 samples of chocolate drink powder samples of several types (traditional, light, diet, and organic) available in the Brazilian market. The samples were previously treated using acid mineralisation assisted by microwave radiation and analysed by graphite furnace atomic absorption spectrometry. Concentrations of Cd were in the range 14-124 and 81-4790 µg kg-1 for Cr...
August 9, 2018: Food Additives & Contaminants. Part B, Surveillance
Fernando Angelo Piotto, Marcia Eugenia Amaral Carvalho, Lucas Anjos Souza, Flávio Henrique Silva Rabêlo, Mônica Regina Franco, Katherine Derlene Batagin-Piotto, Ricardo Antunes Azevedo
This work aimed to develop a reliable and fast approach to estimate the plant tolerance degree to heavy metal (HM) phytotoxicity. Two independent experiments were carried out using tomato accessions, with contrasting morphological features, that were grown in a hydroponic solution containing different CdCl2 concentrations for 7 days. Plant dry weight and chlorophyll content (SPAD units) were evaluated, and tolerance degree to Cd toxicity was estimated according to the tolerance index (TI), which is a new mathematical formula based on plant biomass proposed in this study...
July 27, 2018: Environmental Science and Pollution Research International
Juanjuan Yu, Yongxue Zhang, Junming Liu, Lin Wang, Panpan Liu, Zepeng Yin, Siyi Guo, Jun Ma, Zhuang Lu, Tai Wang, Yimin She, Yuchen Miao, Ling Ma, Sixue Chen, Ying Li, Shaojun Dai
Hydrogen peroxide-responsive pathways in roots of alkaligrass analyzed by proteomic studies and PutGLP enhance the plant tolerance to saline-, alkali- and cadmium-induced oxidative stresses. Oxidative stress adaptation is critical for plants in response to various stress environments. The halophyte alkaligrass (Puccinellia tenuiflora) is an outstanding pasture with strong tolerance to salt and alkali stresses. In this study, iTRAQ- and 2DE-based proteomics approaches, as well as qRT-PCR and molecular genetics, were employed to investigate H2 O2 -responsive mechanisms in alkaligrass roots...
July 23, 2018: Planta
Chunsheng Li, Xianqing Yang, Ying Xu, Laihao Li, Yueqi Wang
Heavy metal tolerance of microorganisms is the basis of heavy metal removal by growing cells. In this study, a cross-protection effect generated by salt stress significantly enhanced the cadmium tolerance of multi-stress-tolerant Pichia kudriavzevii. Comparative transcriptome analysis using RNA-Seq linked with physiological and biochemical observation was used to elucidate the underlying mechanisms of the improved cadmium tolerance. The expression of cadmium transport related genes (GSTY2, GLR1, GLO2, YCF1 and YOR1), GSH content and GST activity were elevated by salt stress, suggesting enhanced cadmium conjugation and detoxification in yeast cells...
July 17, 2018: Environmental Pollution
Sarun Thongnok, Wilailak Siripornadulsil, Surasak Siripornadulsil
Arsenic (As) contamination of rice grain is a serious problem worldwide. The objective of this study was to mitigate As toxicity and accumulation in hydroponically grown KDML105 rice seedlings using bacteria isolated from heavy metal-contaminated soils. Seven strains (KKU2500-1, -2, -3, -9, -12, -16 and -22) of 24 cadmium (Cd)-tolerant bacteria produced high levels of inorganic sulfide and thiol-rich compounds in As-supplemented media. The strains were allowed to colonize rice seedlings growing in arsenite [As(III)]- or arsenate [As(V)]-supplemented Hoagland's nutrient solutions...
October 30, 2018: Ecotoxicology and Environmental Safety
Chun-Ming Lam, Hung-Yu Lai
A plant's tolerance to heavy metals (HMs) and its detoxification mechanisms are associated with the subcellular distribution of HMs and their chemical forms. In this study, water spinach (Ipomoea aquatica Forsk.) was grown in two soils contaminated with a single HM (cadmium, Cd) or combined HMs (Cd and nickel, Ni). Inoculation of arbuscular mycorrizal fungi (AMF) was conducted to increase the accumulation of phosphorus (P) in plants. One major exception was to decrease the migration and accumulation of HMs in edible parts by the formation of P-HM complexes...
October 30, 2018: Ecotoxicology and Environmental Safety
Abhijit Manna, Ellairaja Sundaram, Chinnaiah Amutha, Vairathevar Sivasamy Vasantha
Microbes accumulate heavy metals after adsorption or absorption. This study exhibited that Trametes versicolor can tolerate up to 5 mg/g concentration of cadmium. Change in fungus morphology due to cadmium along with its absorption were analyzed using SEM, XRD, and EDAX. Cadmium absorption usually increased with time, and it was determined quantitatively by a fluorimetry technique using a synthesized imine fluorophore as a specific probe and compared with results obtained from atomic absorption spectroscopy (AAS)...
June 30, 2018: ACS Omega
Wei Fan, Changying Liu, Boning Cao, Meiling Qin, Dingpei Long, Zhonghuai Xiang, Aichun Zhao
The zinc-regulated transporters, iron-regulated transporter-like proteins (ZIPs), the natural resistance and macrophage proteins (NRAMP), the heavy metal ATPases (HMAs) and the metal tolerance or transporter proteins (MTPs) families are involved in cadmium (Cd) uptake, translocation and sequestration in plants. Mulberry ( Morus L.), one of the most ecologically and economically important (as a food plant for silkworm production) genera of perennial trees, exhibits excellent potential for remediating Cd-contaminated soils...
2018: Frontiers in Plant Science
Prashant Kumar Singh, Wenjing Wang, Alok Kumar Shrivastava
Cyanobacteria are a natural inhabitant of paddy field and enhance the crop productivity in an eco-friendly manner. Cadmium (Cd) is a perilous trace metal element which not only limits the crop productivity but also inhibits the growth and nitrogen-fixing ability of these diazotrophs as well as the biodiversity of rice field semiaquatic agroecosystems. However, the impact of Cd toxicity in diazotrophic cyanobacteria is yet not adequately addressed. Therefore, in the present study, three diazotrophic cyanobacterial species, i...
September 2018: Aquatic Toxicology
Yuanyuan Zhang, Kai Chen, Fangjie Zhao, Cuiju Sun, Cheng Jin, Yuheng Shi, Yangyang Sun, Yuan Li, Meng Yang, Xinyu Jing, Jie Luo, Xingming Lian
Copper (Cu) is an essential micronutrient for plant growth. However, the molecular mechanisms underlying Cu trafficking and distribution to different organs in rice are poorly understood. Here, we report the function and role of Antioxidant Protein1 (OsATX1), a Cu chaperone in rice (Oryza sativa). Knocking out OsATX1 resulted in increased Cu concentrations in roots, whereas OsATX1 overexpression reduced root Cu concentrations but increased Cu accumulation in the shoots. At the reproductive stage, the concentrations of Cu in developing tissues, including panicles, upper nodes and internodes, younger leaf blades, and leaf sheaths of the main tiller, were significantly increased in OsATX1-overexpressing plants and decreased in osatx1 mutants compared to that in wild type...
July 12, 2018: Plant Physiology
Jun-Kai Li, Dan Zhang, Pei Zhou, Qun-Lu Liu
To identify plants with potential application in phytoremediation, the concentration of cadmium (Cd), chromium (Cr), copper (Cu), manganese (Mn), lead (Pb), and zinc (Zn) in soil and 14 dominant plants sampled from a lead-zinc mining area in Nanjing City was measured. Furthermore, the heavy metal contamination of soil, and bioaccumulation and translocation of the 6 heavy metals by the 14 plants were evaluated. The results showed that the principal contaminants were Cd, Mn, Zn, and Pb, and their single factor pollution index was 45...
August 8, 2018: Huan Jing Ke Xue= Huanjing Kexue
Qixiao Zhai, Yue Xiao, Arjan Narbad, Wei Chen
Our previous work demonstrated the protective effects of Lactobacillus plantarum (L. plantarum) strains against cadmium (Cd) toxicity in vivo, and also indicated that the Cd tolerance of the strains played an important role in this protection. The goal of this study was to investigate the Cd resistance mechanism of L. plantarum by liquid chromatography-mass spectrometry (LC-MS) based metabolomic analysis, with a focus on the global Cd stress response. L. plantarum CCFM8610 (strongly resistant to Cd) and L. plantarum CCFM191 (sensitive to Cd) were selected as target strains, and their metabolomic profiles with and without Cd exposure were compared...
July 12, 2018: Metallomics: Integrated Biometal Science
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