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Cadmium plant

Xiani Yao, Yuerong Cai, Diqiu Yu, Gang Liang
Cd is a non-essential heavy metal that is toxic to both plants and animals. Here, we reveal that the transcription factor bHLH104 positively regulates Cd tolerance in Arabidopsis thaliana. We found that Fe deficiency-responsive genes were induced by Cd treatment, and that their upregulation was suppressed in bhlh104 loss-of-function mutants but enhanced upon overexpression of bHLH104. Correspondingly, the bhlh104 mutants displayed sensitivity to Cd stress, whereas plants overexpressing bHLH104 exhibited enhanced Cd tolerance...
April 18, 2018: Journal of Integrative Plant Biology
Felipe K Ricachenevsky, Artur T de Araújo Junior, Janette P Fett, Raul A Sperotto
Plant nutrient uptake is performed mostly by roots, which have to acquire nutrients while avoiding excessive amounts of essential and toxic elements. Apoplastic barriers such as the casparian strip and suberin deposition block free diffusion from the rhizosphere into the xylem, making selective plasma membrane transporters able to control elemental influx into the root symplast, efflux into the xylem and therefore shoot translocation. Additionally, transporters localized to the tonoplast of root cells have been demonstrated to regulate the shoot ionome, and may be important for seed elemental translocation...
2018: Frontiers in Plant Science
Frédérique Pasquali, Federica Palma, Laurent Guillier, Alex Lucchi, Alessandra De Cesare, Gerardo Manfreda
Listeria monocytogenes is a foodborne pathogen adapted to survive and persist in multiple environments. Following two previous studies on prevalence and virulence of L. monocytogenes ST121 and ST14 repeatedly collected in a the same rabbit-meat processing plant, the research questions of the present study were to: (1) assess persistence of L. monocytogenes isolates from the rabbit-plant; (2) select genes associated to physiological adaptation to the food-processing environment; (3) compare presence/absence/truncation of these genes in newly sequenced and publicly available ST121 and ST14 genomes...
2018: Frontiers in Microbiology
Ming-Xi Zhou, Hélène Dailly, Marie-Eve Renard, Rui-Ming Han, Stanley Lutts
Data regarding NaCl impact on halophyte plant species exposed to a polymetallic contamination remain scarce. Seedlings of the salt marsh species Kosteletzkya pentacarpos were simultaneously exposed to cadmium (10 μM) and zinc (100 μM) in the absence or presence of 50 mM NaCl. Heavy metal exposure reduced plant growth and increased Cd and Zn concentrations in all organs. Cd and Zn accumulation reduced net photosynthesis in relation to stomatal closure, decreased in chlorophyll concentration and alteration in chlorophyll fluorescence-related parameters...
April 14, 2018: Environmental Science and Pollution Research International
Yongxiang Han, Zhanglin Ni, Shiliang Li, Minghua Qu, Fubin Tang, Runhong Mo, Caifen Ye, Yihua Liu
Walnut is one of the most popular nuts worldwide and contains various mineral nutrients. Little is known, however, about the relationship between toxic heavy metals in walnuts and growth soil. In this study, we investigated the distribution, relationship, and risk assessment of five toxic heavy metals-lead (Pb), arsenic (As), chromium (Cr), cadmium (Cd), and mercury (Hg)-in walnuts and growth soil in the main production areas of China. The results showed that the main heavy metal pollution in walnut and soil was Pb and Cd...
April 14, 2018: Environmental Science and Pollution Research International
Shiliang Liu, Rongjie Yang, Durgesh Kumar Tripathi, Xi Li, Mingyan Jiang, Bingyang Lv, Mingdong Ma, Qibing Chen
The significant influence of • NO on the stress response is well established; however, the precise metabolic pathways of • NO and RNS under metal stresses remain unclear. Here, the key components of ROS and RNS metabolism under Cd stress were investigated with multi-level approaches using high-quality forage white clover (Trifolium repens L.) plants. For the studied plants, Cd disturbed the redox homeostasis, affected the absorption of minerals, and exacerbated the degree of lipid peroxidation, thus triggering oxidative stress...
April 9, 2018: Environmental Pollution
Jiumei Long, Di Tan, Sihan Deng, Ming Lei
To provide information on reclamation of multi-heavy metal polluted soils with conception of phytostabilization, a field survey on the uptake and accumulation of potentially toxic elements such as antimony (Sb), arsenic (As), lead (Pb), cadmium (Cd), copper (Cu), and zinc (Zn) in colonized plant species around the world's largest antimony mine area, China, was conducted. Samples including leaves and shoots (including roots and stems) of colonized plants as well as rhizospheric soils were collected from eight sampling zones in the studied area...
April 11, 2018: Environmental Geochemistry and Health
Soumik Mitra, Krishnendu Pramanik, Pallab Kumar Ghosh, Tithi Soren, Anumita Sarkar, Ramendra Sundar Dey, Sanjeev Pandey, Tushar Kanti Maiti
Application of heavy metal resistant plant growth promoting rhizobacteria has an important role as they help to evade metal-induced toxicity in plants on one hand and enhance plant growth on the other. The present study is therefore focused on the characterization of a cadmium resistant bacterial strain isolated from heavy metal contaminated rhizospheric soil designated as S8. This S8 strain was selected in terms of cadmium resistance and plant growth promoting traits. Moreover, it also showed resistance to lead and arsenic to a considerable extent...
May 2018: Microbiological Research
Yansha Han, Mengyang Wu, Lihong Hao, Huilan Yi
Sulfur dioxide (SO2 ) was recently proposed as a novel bio-regulator in mammals. However, the possible advantageous effects of SO2 in plant adaptation to heavy metal-contaminated environments are largely unknown. In the present study, using Na2 SO3 /NaHSO3 derivatives as SO2 donors, we investigated the possible roles and regulation mechanisms of SO2 in alleviating Cd2+ toxicity in foxtail millet seedlings. Exogenous SO2 derivatives (0.5 mM) application significantly reduced the seedling growth inhibition caused by Cd2+ stress...
April 3, 2018: Ecotoxicology and Environmental Safety
Garima Singh, Shubhandra Tripathi, Karuna Shanker, Ashok Sharma
Plants play an important role in the removal of excess heavy metals from soil and water. Medicinal plants can also have non-traditional use in phytoremediation technologies. Among the heavy metals, Cadmium (Cd) is the most abundant and readily taken up by the crop plants. Plant metallothioneins (MTs) are small proteins having cysteine rich residues and appear to play key roles in metal homeostasis. Plant metallothionein 2 (MT 2) from Coptis japonica (Gold-thread; CjMT 2) is a typical member of this subfamily and features two cysteine-rich regions containing eight and six cysteine residues, respectively, separated by 42 amino acids long linker region...
April 6, 2018: Journal of Biomolecular Structure & Dynamics
Xian Duo Zhang, Jia Yun Sun, Yuan Yuan You, Jian Bo Song, Zhi Min Yang
RNA helicases play crucial roles in RNA splicing, transport, editing and degradation, protein translation initiation and siRNA-mediated gene silencing. However, knowledge about their functionality in rapeseed (Brassica napus) is rare. In the study, we identified and annotated 271 RNA helicase genes from B. napus using bioinformatics and high-throughput RNA-sequencing (RNA-seq). Three subfamilies DEAD-box, DEAH-box, or DExD/H-box have been identified. One hundred and ninety-five RNA helicases were confirmed by RNA-seq and 49 were identified to differentially respond to cadmium (Cd) stress (> 1...
April 2, 2018: Ecotoxicology and Environmental Safety
Chin-Ching Wu, Fung-Chang Sung, Yi-Chun Chen
There has been growing concern over the impact of environmental exposure to heavy metals and other trace elements on immunologic functions. This study investigated men's arsenic (As), cadmium (Cd) and lead (Pb) contents in hair samples and their associations with immunological indicators, including white blood cell (WBC), lymphocyte and monocyte counts, and the immunoglobulin (Ig) levels including IgA, IgG and IgE. We recruited 133 men from one antimony trioxide manufacturing plant, two glass manufacturing plants and two plastics manufacturing plants...
April 5, 2018: International Journal of Environmental Research and Public Health
Christophe Loix, Michiel Huybrechts, Jaco Vangronsveld, Marijke Gielen, Els Keunen, Ann Cuypers
[This corrects the article on p. 1867 in vol. 8, PMID: 29163592.].
2018: Frontiers in Plant Science
Xu Zhang, Xinxin Li, Huanhuan Yang, Zhaojie Cui
This study focused on the bioremediation mechanisms of lead (0, 100, 500, 1000 mg kg-1 ) and cadmium (0,10,50,100 mg kg-1 ) contaminated soil using two indigenous fungi selected from mine tailings as the phytostimulation of Arabidopsis thaliana. The two fungal strains were characterized as Mucor circinelloides (MC) and Trichoderma asperellum (TA) by internal transcribed spacer sequencing at the genetic levels. Our research revealed that Cadmium was more toxic to plant growth than lead and meanwhile, MC and TA can strengthen A...
March 29, 2018: Ecotoxicology and Environmental Safety
Ladislav Tamás, Loriana Demecsová, Veronika Zelinová
Exposure of barley roots to mM concentrations of L-NAME for 30 min caused a considerable root growth inhibition in a dose-dependent manner. The inhibition of root growth was higher in seedlings co-treated with Cd and L-NAME, compared with roots treated with Cd alone, despite the fact that L-NAME markedly reduced the uptake of Cd by roots. Treatment of roots with L-NAME evoked a decrease in NO level in both control and Cd-treated root tips only after a relatively long lag period, which overlaps with an increase in superoxide and H2 O2 levels and peroxynitrite generation...
March 22, 2018: Journal of Plant Physiology
Jun Ni, Qiaojian Wang, Faheem Afzal Shah, Wenbo Liu, Dongdong Wang, Shengwei Huang, Songling Fu, Lifang Wu
Melatonin has emerged as a research highlight regarding its important role in regulating plant growth and the adaptation to the environmental stresses. In this study, we investigated how melatonin prevented the cadmium toxicity to wheat seedlings. The results demonstrated that cadmium induced the expression of melatonin biosynthesis-related genes and cause a significant increase of endogenous melatonin level. Melatonin treatment drastically alleviated the cadmium toxicity, resulting in increased plant height, biomass accumulation, and root growth...
March 30, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Piotr Bulak, Lesia Lata, Andrzej Plak, Dariusz Wiącek, Wacław Strobel, Anna Walkiewicz, Stanisław Pietruszewski, Andrzej Bieganowski
It was hypothesized that electromagnetic field (EMF) pretreatment of white mustard (Sinapis alba L.) seeds could increase the accumulation of non-essential, pollutant heavy metals such as cadmium (Cd) in shoots. Seeds of white mustard were treated with either 60 or 120 mT of alternating EMF (50 Hz) for 1 minute and then grown in a Petri dish in the presence of Cd, in comparison to the control (seeds grown without EMF pretreatment). Biomass production and content of calcium (Ca) and Cd in seedling shoots were measured...
March 21, 2018: International Journal of Phytoremediation
Jian Zhou, Miao Hao, Yonghong Liu, Guoyong Huang, Qingling Fu, Jun Zhu, Hongqing Hu
Soil pollution with heavy metals has many adverse effects on ecosystem health as well as food security. A pot experiment was performed to investigate the effects of different valence states of exogenous sulfur (S) on the uptake of cadmium (Cd) in Chinese cabbage in Cd-contaminated soil. The results showed that S significantly promoted plant growth in Chinese cabbage, with the following order of magnitude for the different S treatments: sodium sulfite (Na2 SO3 ) > sodium sulfate (Na2 SO4 ) > powdered sulfur (S0 )...
March 26, 2018: Environmental Science and Pollution Research International
Chuan-Yi Peng, Xiao-Hui Zhu, Ru-Yan Hou, Gao-Fei Ge, Ri-Mao Hua, Xiao-Chun Wan, Hui-Mei Cai
Environmental and plant factors (soil condition, variety, season, and maturity) and exposure risks of aluminum (Al), manganese (Mn), lead (Pb), cadmium (Cd), and copper (Cu) in tea leaves were investigated. The concentrations of these metals in tea leaves could not be predicted by their total concentrations in the soil. During any one season, there were differences in Al, Mn, and Cd levels between tea varieties. Seasonally, autumn tea and/or summer tea had far higher levels of Al, Mn, Pb, and Cd than did spring tea...
March 25, 2018: Journal of Food Science
Yuanqing Ren, Yanhui Chen, Jie An, Zhongxian Zhao, Guangqiang Zhang, Yong Wang, Wei Wang
Cadmium (Cd) is a severe and toxic heavy metal pollutant that affects plant growth and development. In this study, we found that the expression of an expansin gene, TaEXPA2, was upregulated in wheat leaves under CdCl2 toxicity. We characterized the involvement of TaEXPA2 in conferring Cd tolerance. Tobacco plants overexpressing TaEXPA2 showed higher germination rate, root elongation, and biomass accumulation compared to the wild-type (WT) plants upon CdCl2 treatment. The improved photosynthetic parameters and lesser cellular damage in transgenic plants exposed to Cd compared to that in the WT plants suggest that TaEXPA2 overexpression improves Cd tolerance in plants...
May 2018: Plant Science: An International Journal of Experimental Plant Biology
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