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Cadmium plant

Lorenzo Rossi, Weilan Zhang, Arthur Paul Schwab, Xingmao Ma
Agricultural soils are likely to be polluted by both conventional and emerging contaminants at the same time. Understanding the interactions of co-existing engineered nanoparticles (ENPs) and trace-elements (a common source of abiotic stress) is critical to gain insights into the accumulation of these two groups of chemicals by plants. The objectives of this study were to determine the uptake and accumulation of co-existing ENPs and trace-elements by soybeans and to gain insights into the physiological mechanisms resulting in different plant accumulation of these materials...
October 12, 2017: Environmental Science & Technology
Mohd Hafiz Ibrahim, Yap Chee Kong, Nurul Amalina Mohd Zain
A randomized complete block (RCBD) study was designed to investigate the effects of cadmium (Cd) and copper (Cu) on the growth, bioaccumulation of the two heavy metals, metabolite content and antibacterial activities in Gyanura procumbens (Lour.) Merr. Nine treatments including (1) control (no Cd and Cu); (2) Cd 2 = cadmium 2 mg/L; (3) Cd 4 = cadmium 4 mg/L; (4) Cu 70 = copper 70 mg/L; (5) Cu 140 = copper 140 mg/L); (6) Cd 2 + Cu 70 = cadmium 2 mg/L + copper 70 mg/L); (7) Cd 2 + Cu 140 = cadmium 2 mg/L + copper 70 mg/L); (8) Cd 4 + Cu 70 = cadmium 4 mg/L+ copper 70 mg/L and (9) Cd 4 + Cu 140 = cadmium 4 mg/L + copper 140 mg/L) were evaluated in this experiment...
October 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Asma Suliman Al-Gebaly
BACKGROUND AND OBJECTIVE: Cadmium (Cd) is a non-essential metal whose dispersion in the environment has increased recently, Cd may enhance cell oxidative stress that leads to DNA damage and apoptotic cell death. The study aimed to evaluate the antioxidative capability of Burdock root 'Arctium lappa' on cadmium-induced oxidative stress and histopathology of the kidney of Wistar rats. METHODOLOGY: Cadmium was applied in a form of cadmium chloride to three groups (15 mg Cd kg-1) for five weeks with two groups pre-treated with 'Arctium lappa' administration, 100 and 200 mg kg-1 b...
2017: Pakistan Journal of Biological Sciences: PJBS
Zhigang Fang, Laiqing Lou, Zhenglan Tai, Yufeng Wang, Lei Yang, Zhubing Hu, Qingsheng Cai
Cadmium (Cd) is one of the most toxic heavy metals and is difficult to be removed from contaminated soil and water. Italian ryegrass (Lolium multiflorum), as an energy crop, exhibits a valuable potential to develop Cd polluted sites due to its use as a biofuel rather than as food and forage. Previously, via a screening for Cd-tolerant ryegrass, the two most extreme cultivars (IdyII and Harukaze) with high and low Cd tolerance during seed germination, respectively, were selected. However, the underlying mechanism for Cd tolerance was not well investigated...
2017: PeerJ
Shimpei Uraguchi, Nobuhiro Tanaka, Christian Hofmann, Kaho Abiko, Naoko Ohkama-Ohtsu, Michael Weber, Takehiro Kamiya, Yuka Sone, Ryosuke Nakamura, Yasukazu Takanezawa, Masako Kiyono, Toru Fujiwara, Stephan Clemens
Phytochelatin (PC) synthesis has been well demonstrated as a major metal tolerance mechanism in Arabidopsis thaliana, whereas its contribution to long-distance element transport especially in monocots remains elusive. Using rice as a cereal model, we examined physiological roles of OsPCS1 in the distribution and detoxification of arsenic (As) and cadmium (Cd), two toxic elements associated with major food safety concerns. First, we isolated four different transcript variants of OsPCS1 as well as one from OsPCS2...
August 14, 2017: Plant & Cell Physiology
Ting Wang, Hong Wei, Cui Zhou, Yanwen Gu, Rui Li, Hongchun Chen, Wenchao Ma
Hyperspectral remote sensing can be applied to the rapid and nondestructive monitoring of heavy-metal pollution in crops. To realize the rapid and real-time detection of cadmium in the edible part (fruit) of Capsicum annuum, the leaf spectral reflectance of plants exposed to different levels of cadmium stress was measured using hyperspectral remote sensing during four growth stages. The spectral indices or bands sensitive to cadmium stress were determined by correlation analysis, and hyperspectral estimation models for predicting the cadmium content in the fruit of C...
October 9, 2017: Environmental Monitoring and Assessment
Jin Guo Meng, Xian Duo Zhang, Shang Kun Tan, Kai Xuan Zhao, Zhi Min Yang
In plants, metal transporters are responsible for metal uptake, translocation and homeostasis. These metals include essential nutrients such as zinc (Zn) and manganese (Mn) or non-essential metals like cadmium (Cd) and lead (Pb). Although a few metal transporters have been well characterized in model plants, little is known about their functionality in rapeseed (Brassica napus). In the study, 22 NRAMP transporter genes from B. napus genome were identified and annotated using bioinformatics and high-throughput RNA-sequencing (RNA-seq)...
October 9, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
Shi-Kai Fan, Jun Zhu, Wen-Hao Tian, Mei-Yan Guan, Xian-Zhi Fang, Chong-Wei Jin
Cadmium (Cd) contamination in soil is an increasingly serious problem. Management of plant nutrients has been proposed as a potentially promising strategy for minimizing Cd accumulation in crops grown in contaminated soil. This study investigated the effects of split applications of nitrogen (N) fertilizers on the Cd concentration in Chinese cabbage (Brassica chinensis L.) plants grown in Cd-contaminated soil. Compared with single applications, split applications of ammonium or urea resulted in significantly lower Cd concentrations, and higher biomass production and antioxidant-associated nutritional quality in the edible plant parts...
2017: Journal of Zhejiang University. Science. B
Zi Jun Yong, Mohammed J K Bashir, Choon Aun Ng, Sumathi Sethupathi, Jun-Wei Lim
The increase in landfill leachate generation is due to the increase of municipal solid waste (MSW) as global development continues. Landfill leachate has constantly been the most challenging issue in MSW management as it contains high amount of organic and inorganic compounds that might cause pollution to water resources. Biologically treated landfill leachate often fails to fulfill the regulatory discharge standards. Thus, to prevent environmental pollution, many landfill leachate treatment plants involve multiple stages treatment process...
October 5, 2017: Journal of Environmental Management
Youko Oono, Takayuki Yazawa, Hiroyuki Kanamori, Harumi Sasaki, Satomi Mori, Takashi Matsumoto
BACKGROUND: The elucidation of novel transcripts and their expression in response to various stress conditions is necessary to understand the transcriptional network of plants as an adaptation to biotic and abiotic stresses. We performed strand-specific RNA-Seq (ssRNA-Seq) on rice exposed to cadmium (Cd) for 24 h and investigated the expression of cis-natural antisense transcripts (cis-NATs), a class of endogenous coding or non-protein-coding RNAs with sequence complementarity to the opposite strands of RAP transcripts...
October 6, 2017: BMC Genomics
Bing-Lin Zhang, You-Nan Ouyang, Jun-Ying Xu, Ke Liu
The remobilization of cadmium (Cd) from shoots to grain is the key process to determine the Cd accumulation in grain. The apoplastic pH of plants is an important factor and signal in influencing on plant responding to environmental variation and inorganic elements uptake. It is proposed that pH of rice plants responds and influences on Cd remobilization from shoots to grain when rice is exposed to Cd stress. The results of hydroponic experiment showed that: pH of the rice leaf vascular bundles among 3 cultivars was almost increased, pH value of 1 cultivar was slightly increasing when rice plants were treated with Cd...
October 2, 2017: Ecotoxicology and Environmental Safety
Mads Troldborg, Dominic Duckett, Richard Allan, Emily Hastings, Rupert L Hough
A generalised quantitative risk assessment (QRA) is developed to assess the potential harm to human health resulting from irrigation with reclaimed water. The QRA is conducted as a backward calculation starting from a pre-defined acceptable risk level at the receptor point (defined as an annual infection risk of 10(-4) for pathogens and by reference doses (RfD) for chemical hazards) and results in an estimate of the corresponding acceptable concentration levels of the given hazards in the effluent. In this way the QRA is designed to inform the level of water treatment required to achieve an acceptable risk level and help establish reclaimed water quality standards...
September 25, 2017: Water Research
Zhao Zhao, Huijuan Shi, Xianjiang Kang, Cunqi Liu, Lingci Chen, Xiaofei Liang, Lei Jin
The influences of intra- and inter-species competition on ecosystems are poorly understood. Lemna aequinoctialis and Spirodela polyrhiza were used to assess the effects of exposure to different concentrations of multiple heavy metals (copper-cadmium-zinc), when the plants were grown in mixed- or mono-culture. Parameters assessed included relative growth rate (RGR), content of chlorophyll, glutathione (GSH), malondialdehyde (MDA), as well as the activity of catalase (CAT), superoxide dismutase (SOD) and peroxidase (POD)...
September 27, 2017: Aquatic Toxicology
Chu Chen, Shenglan Xia, Rubo Deng, Caifeng Liu, Gangrong Shi
Fe deficiency may increase Cd accumulation in peanuts. However, the mechanisms are not yet fully understood. In the present study, two contrasting peanut cultivars, Luhua 8 (low seed-Cd cultivar) and Zhenghong 3 (high seed-Cd cultivar) were used to investigate the effect of Fe deficiency on the uptake and accumulation of cadmium (Cd) by hydroponic experiments. Under Fe-sufficient conditions, compared with Luhua 8, Zhenghong 3 had higher specific root length (SRL) and proportion of fine roots with a lower Km for Cd and showed slightly higher expression of AhIRT1 and AhNRAMP1 in the roots...
2017: PloS One
Gareth J Norton, Anthony J Travis, John M C Danku, David E Salt, Mahmud Hossain, Md Rafiqul Islam, Adam H Price
As the global population grows, demand on food production will also rise. For rice, one limiting factor effecting production could be availability of fresh water, hence adoption of techniques that decrease water usage while maintaining or increasing crop yield are needed. Alternative wetting and drying (AWD) is one of these techniques. AWD is a method by which the level of water within a rice field cycles between being flooded and nonflooded during the growth period of the rice crop. The degree to which AWD affects cultivars differently has not been adequately addressed to date...
August 2017: Food and energy security
Molla F Mengist, Dan Milbourne, Denis Griffin, Mike J McLaughlin, Joanne Creedon, Peter W Jones, Sheila Alves
Potatoes grown in soil with high Cd concentrations can accumulate high levels of Cd in the tubers. Although there is significant environmental variation involved in the trait of crop uptake of Cd, there are also distinctive cultivar differences. In order to understand this differential Cd accumulation mechanism, two potato cultivars were chosen that accumulate high and low levels of Cd in tubers. The patterns of Cd concentration, Cd content and dry weight accumulation of the two cultivars were examined at different stages of plant growth...
October 3, 2017: Environmental Science and Pollution Research International
Hongxiao Zhang, Shufang Lv, Huawei Xu, Dianyun Hou, Youjun Li, Fayuan Wang
Cadmium (Cd) and excess copper (Cu) are toxic to plants, causing a wide range of deleterious effects including the formation of reactive oxygen species. Metallothioneins (MTs) may protect plant cells from heavy metal toxicity by chelating heavy metals via cysteine thiol groups. They may also function as antioxidants. The study investigated the relationship of H₂O₂ production and ricMT expression in rice radicles and rice suspension cells under Cu or Cd stress. The results showed that H₂O₂ production in the rice radicles increased before Cu-induced ricMT expression, and after Cd-induced ricMT expression...
October 1, 2017: International Journal of Molecular Sciences
Dagmara Jakubowska, Małgorzata Janicka
The present research aim was to define the role of brassinosteroids (BRs) in plant adaptation to cadmium stress. We observed a stimulating effect of exogenous BR on the activity of two plasma membrane enzymes which play a key role in plants adaptation to cadmium stress, H(+)-ATPase (EC and NADPH oxidase (EC Using anti-phosphothreonine antibody we showed that modification of PM H(+)-ATPase activity under BR action could result from phosphorylation of the enzyme protein. Also the relative expression of genes encoding both PM H(+)-ATPase and NADPH oxidase was affected by BR...
November 2017: Plant Science: An International Journal of Experimental Plant Biology
Shubao Hu, Yao Yu, Qiuhong Chen, Guangmao Mu, Zhenguo Shen, Luqing Zheng
Cadmium (Cd) is one of the most toxic heavy metal elements in nature, and it causes serious damage to plant cells. Here, we report that a transcription factor OsMYB45 is involved in Cd stress response in rice. OsMYB45 is highly expressed in rice leaves, husks, stamens, pistils, and lateral roots, and its expression is induced by Cd stress. OsMYB45 fused to green fluorescent protein localized to the cell nucleus in onion epidermal cells. Mutation of OsMYB45 resulted in hypersensitivity to Cd treatment, and the concentration of H2O2 in the leaves of mutant nearly doubled, while catalase (CAT) activity was halved compared with the wild-type...
November 2017: Plant Science: An International Journal of Experimental Plant Biology
Quan Gu, Ziping Chen, Weiti Cui, Yihua Zhang, Huali Hu, Xiuli Yu, Qingya Wang, Wenbiao Shen
Although methane (CH4) generation triggered by some environmental stimuli, displays the protective response against oxidative stress in plants, whether and how CH4 regulates plant tolerance against cadmium stress is largely unknown. Here, we discovered that cadmium (Cd) stimulated the production of CH4 in alfalfa root tissues. The pretreatment with exogenous CH4 could alleviate seedling growth inhibition. Less amounts of Cd accumulation was also observed. Consistently, in comparison with Cd stress alone, miR159 transcript was down-regulated by CH4, and expression levels of its target gene ABC transporter was increased...
September 27, 2017: Ecotoxicology and Environmental Safety
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