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https://www.readbyqxmd.com/read/29450951/studies-on-lead-and-cadmium-toxicity-in-dianthus-carthusianorum-calamine-ecotype-cultivated-in-vitro
#1
Ewa Muszyńska, Ewa Hanus-Fajerska, Krystyna Ciarkowska
The approach based on metallophytes during reclamation of grounds contaminated with heavy metals is still sparse. Thus, we investigated the response of D. carthusianorum calamine ecotype to Pb and Cd stress. We focused on in vitro selection of tolerant plant material appropriated to direct use on chemically degraded areas. Shoot cultures were treated with various concentration of Pb or Cd ions. Plantlets status was estimated on the basis of micropropagation efficiency, growth tolerance index (GTI) and physiological analysis...
February 16, 2018: Plant Biology
https://www.readbyqxmd.com/read/29448204/experimental-and-computational-assessment-of-mycosynthesized-cdo-nanoparticles-towards-biomedical-applications
#2
Gowri S, Gopinath K, Arumugam A
The present study reports the biogenic synthesis of Cadmium Oxide Nanoparticles (CdO NPs) using plant pathogenic fungus Nigrospora oryzae culture filtrate. Further, the effect of the NPs on the cancer cell line (HeLa) is explored. The sample was characterized using Thermogravimetric/Differential Thermal (TG/DTA), Powder X-ray Diffraction (XRD), X-ray Photoelectron spectroscopy (XPS), UV-Visible Diffuse Reflectance Spectroscopy (UV-DRS), Field Emission Transmission Electron Microscopy (FE-SEM) with Energy Dispersive X-ray Spectroscopy (EDX), High Resolution Transmission Electron Microscopy (HR-TEM) and Selected Area Electron Diffraction (SAED) analysis...
February 7, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29433104/stable-isotope-fractionation-during-uptake-and-translocation-of-cadmium-by-tolerant-ricinus-communis-and-hyperaccumulator-solanum-nigrum-as-influenced-by-edta
#3
Rongfei Wei, Qingjun Guo, Guirui Yu, Jing Kong, Siliang Li, Zhaoliang Song, Jian Hu, Liyan Tian, Xiaokun Han, Chukwunonso Peter Okoli
The isotopic fractionation could contribute to understanding the Cd accumulation mechanisms in plant species. However, there are few of systematical investigations with regards to the Cd isotope fractionation in hyperaccumulator plants. The Cd tolerant Ricinus communis and hyperaccumulator Solanum nigrum were cultivated in nutrient solutions with varying Cd and EDTA concentrations. Cd isotope ratios were determined in the solution, root, stem and leaf. The two investigated plants were systematically enriched in light isotopes relative to their solutions (Δ114/110Cdplant-solution = -0...
February 9, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29426190/sulfide-alleviates-cadmium-toxicity-in-arabidopsis-plants-by-altering-the-chemical-form-and-the-subcellular-distribution-of-cadmium
#4
Mei Yan Guan, Hai Hua Zhang, Wei Pan, Chong Wei Jin, Xian Yong Lin
Several sulfur compounds are thought to play important roles in the plant tolerance to cadmium (Cd), but the role of inorganic sulfide in Cd tolerance remains largely unknown. In this study, we found that Cd exposure increased the accumulation of soluble sulfide in Arabidopsis plants. When exogenous sulfide, in the form of NaHS, was foliarly applied, Cd-induced growth inhibition and oxidative stress were alleviated. In addition, although the foliar application of sulfide did not affect the total Cd levels, it significantly decreased the soluble Cd fractions in plants...
January 31, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29422192/biochars-induced-modification-of-dissolved-organic-matter-dom-in-soil-and-its-impact-on-mobility-and-bioaccumulation-of-arsenic-and-cadmium
#5
Gang Li, Sardar Khan, Muhammad Ibrahim, Tian-Ran Sun, Jian-Feng Tang, James B Cotner, Yao-Yang Xu
Biochar application has attracted great attention due to its diverse uses and benefits in the fields of environmental management and agriculture. Biochar modifies the composition of dissolved organic matter (DOM) in soil, which directly or indirectly controls the mobility of metal contaminants and their bioaccumulation. In this study, ten different hydrothermal biochars pyrolysed from mushroom waste (MSBC), soybean straw (SBBC), sewage sludge (SSBC), peanut shells (PNBC) and rice straw (RSBC) at two pyrolysis temperatures (200 °C and 350 °C) were used to investigate DOM changes in soil solution and their effects on metal availability and bioaccumulation...
April 15, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29421138/exogenous-phosphorus-enhances-cadmium-tolerance-by-affecting-cell-wall-polysaccharides-in-two-mangrove-seedlings-avicennia-marina-forsk-vierh-and-kandelia-obovata-s-l-yong-differing-in-cadmium-accumulation
#6
Minyue Dai, Wenwen Liu, Hualong Hong, Haoliang Lu, Jingchun Liu, Hui Jia, Chongling Yan
Phosphorous (P) is an essential element that mediates various stresses in plants. In this study, the effects of P on polysaccharides in the root cell walls of two hydroponically cultivated mangrove seedlings (A. marina and K. obovata) that differ in Cd accumulation ability were examined in the context of Cd stress. The results showed that A. marina exhibited a higher degree of tolerance to Cd than K. obovata. In both mangrove seedlings, pectin and hemicellulose 1 increased significantly with increasing P levels, the effects of which were greater in A...
January 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29421085/distribution-correlations-of-cadmium-to-calcium-phosphorus-sodium-and-chloridion-in-mangrove-aegiceras-corniculatum-root-tissues
#7
Jian Li, Junyi Yu, Chongling Yan, Daolin Du, Jingchun Liu, Haoliang Lu
Nutriment distributions might influence Cd distribution and Cd tolerance in mangrove plant roots. To demonstrate this, Aegiceras corniculatum was stressed by Cd, and the distributions of Cd, Ca, P, Na and Cl in plant roots were detected with the aid of SEM-EDX. It was found that endodermis, pith and xylem were the predominant tissues for retardation and regional enrichment of Cd. Na and Cl distributions suggest a critical role of salt resistance tissues on Cd tolerance in roots. P participated in Cd retardation and regional enrichment of endodermis and xylem...
January 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29413907/ophthalmic-acid-is-a-marker-of-oxidative-stress-in-plants-as-in-animals
#8
Luigi Servillo, Domenico Castaldo, Alfonso Giovane, Rosario Casale, Nunzia D'Onofrio, Domenico Cautela, Maria Luisa Balestrieri
BACKGROUND: Ophthalmic acid (OPH), γ-glutamyl-L-2-aminobutyryl-glycine, a tripeptide analogue of glutathione (GSH), has recently captured considerable attention as a biomarker of oxidative stress in animals. The OPH and GSH biosynthesis, as well as some biochemical behaviors, are very similar. Here, we sought to investigate the presence of OPH in plants and its possible relationship with GSH, known to possess multiple functions in the plant development, growth and response to environmental changes...
January 31, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29407786/cadmium-uptake-accumulation-and-remobilization-in-iron-plaque-and-rice-tissues-at-different-growth-stages
#9
Hang Zhou, Wei Zhu, Wen-Tao Yang, Jiao-Feng Gu, Zi-Xiang Gao, Li-Wei Chen, Wen-Qi Du, Ping Zhang, Pei-Qin Peng, Bo-Han Liao
Rice consumption is considered the main source of human dietary Cd intake in Southeast Asia. This study aimed to investigate Cd uptake, accumulation, and remobilization in iron plaque and rice (Oryza sativa L. cv. 'Xiangwanxian 12') tissues at different growth stages. A pot experiment was performed in two Cd-contaminated paddy soils. Cd concentrations in iron plaque and rice tissues at five different growth stages (tillering, booting, milky, dough, and maturing) were measured. Cd concentrations in iron plaque and rice tissues (roots, stems, leaves, spikelet, husks, and brown rice) varied with growth stage...
January 26, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29407734/short-term-assessment-of-cadmium-toxicity-and-uptake-from-different-types-of-cd-based-quantum-dots-in-the-model-plant-allium-cepa-l
#10
Pavlína Modlitbová, Pavel Pořízka, Karel Novotný, Jana Drbohlavová, Ivana Chamradová, Zdeněk Farka, Helena Zlámalová-Gargošová, Tea Romih, Jozef Kaiser
We report on the toxicity and bioaccumulation of three different types of Cd-based quantum dots (QDs), dispersed in aqueous medium, for a model plant Allium cepa L. It is believed that encapsulation of nanoparticles should reduce their toxicity and increase their stability in different environments; in this work we studied how QD encapsulation affects their phytotoxicity. Core, core/shell, and core/shell/shell QDs (CdTe, CdTe/ZnS, and CdTe/CdS/ZnS QDs capped by 2-mercaptopropionic acid) were tested and CdCl2 was used as a positive control...
February 1, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29405042/variations-in-cadmium-and-nitrate-co-accumulation-among-water-spinach-genotypes-and-implications-for-screening-safe-genotypes-for-human-consumption
#11
Lin Tang, Wei-Jun Luo, Zhen-Li He, Hanumanth Kumar Gurajala, Yasir Hamid, Kiran Yasmin Khan, Xiao-E Yang
Vegetables are important constituents of the human diet. Heavy metals and nitrate are among the major contaminants of vegetables. Consumption of vegetables and fruits with accumulated heavy metals and nitrate has the potential to damage different body organs leading to unwanted effects. Breeding vegetables with low heavy metal and nitrate contaminants is a cost-effective approach. We investigated 38 water spinach genotypes for low Cd and nitrate co-accumulation. Four genotypes, i.e. JXDY, GZQL, XGDB, and B888, were found to have low co-accumulation of Cd (<0...
2018: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/29405041/role-of-jasmonic-acid-in-improving-tolerance-of-rapeseed-brassica-napus-l-to-cd-toxicity
#12
Essa Ali, Nazim Hussain, Imran Haider Shamsi, Zahra Jabeen, Muzammil Hussain Siddiqui, Li-Xi Jiang
The well-known detrimental effects of cadmium (Cd) on plants are chloroplast destruction, photosynthetic pigment inhibition, imbalance of essential plant nutrients, and membrane damage. Jasmonic acid (JA) is an alleviator against different stresses such as salinity and drought. However, the functional attributes of JA in plants such as the interactive effects of JA application and Cd on rapeseed in response to heavy metal stress remain unclear. JA at 50 µmol/L was observed in literature to have senescence effects in plants...
2018: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/29398842/silicon-deposition-in-roots-minimizes-the-cadmium-accumulation-and-oxidative-stress-in-leaves-of-cowpea-plants
#13
Talitha Soares Pereira, Thaís Soares Pereira, Carla Leticia Figueredo de Carvalho Souza, Emilly Juliane Alvino Lima, Bruno Lemos Batista, Allan Klynger da Silva Lobato
Silicon (Si) frequently accumulates in plants tissues, mainly in roots of dicotyledons, such as cowpea. By contrast, Cadmium (Cd) is a metal that is extremely toxic to plant metabolism. This research aims to investigate if the deposition of Si in root can reduce Cd contents and minimize its negative effects on leaves, measuring gas exchange, chlorophyll fluorescence, antioxidant metabolism, photosynthetic pigments and growth, which may explain the possible role of Si in the attenuation of Cd toxicity in cowpea...
February 2018: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/29398730/differential-tolerance-to-lead-and-cadmium-of-micropropagated-gypsophila-fastigiata-ecotype
#14
Ewa Muszyńska, Ewa Hanus-Fajerska, Aleksandra Koźmińska
In vitro techniques may provide a suitable tool for effective propagation and conservation of plant species representing various ecological niches. The elaboration of such protocols is also prerequisite for selection of heavy-metal-tolerant plant material that could be afterwards used for restoration or remediation of polluted sites. In this study, culture protocol for Gypsophila fastigiata propagation was developed. The highest multiplication coefficient, which reached 6.5, and the best growth parameters were obtained on modified MS medium supplemented with 1...
2018: Water, Air, and Soil Pollution
https://www.readbyqxmd.com/read/29397540/protective-effects-of-quercetin-against-cadmium-chloride-induced-oxidative-injury-in-goat-sperm-and-zygotes
#15
Tingchao Mao, Chengquan Han, Biao Wei, Lu Zhao, Qing Zhang, Ruizhi Deng, Jun Liu, Yan Luo, Yong Zhang
Quercetin, a plant-derived flavonoid, is frequently used as an antioxidant for efficient anti-oxidative capacity. However, whether quercetin has protective effects on goat sperm and preimplantation embryos against Cd2+-induced oxidative injury is still unclear. So, we researched the influence of quercetin on goat sperm and zygotes respectively under the oxidative stress induced by Cd2+. In our study, quercetin decreased the malonaldehyde (MDA) and reactive oxygen species (ROS) levels caused by Cd2+ in goat sperm (p < 0...
February 4, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29394308/root-hair-abundance-impacts-cadmium-accumulation-in-arabidopsis-thaliana-shoots
#16
Jana Kohanová, Michal Martinka, Marek Vaculík, Philip J White, Marie-Theres Hauser, Alexander Lux
Background and Aims: Root hairs increase the contact area of roots with soil and thereby enhance the capacity for solute uptake. The strict hair/non-hair pattern of Arabidopsis thaliana can change with nutrient deficiency or exposure to toxic elements, which modify root hair density. The effects of root hair density on cadmium (Cd) accumulation in shoots of arabidopsis genotypes with altered root hair development and patterning were studied. Methods: Arabidopsis mutants that are unable to develop root hairs (rhd6-1 and cpc/try) or produce hairy roots (wer/myb23) were compared with the ecotype Columbia (Col-0)...
January 31, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29392606/effects-of-cadmium-on-photosynthesis-of-schima-superba-young-plant-detected-by-chlorophyll-fluorescence
#17
Jingjing Chu, Fan Zhu, Xiaoyong Chen, Huizi Liang, Renjie Wang, Xuxu Wang, Xinhao Huang
Contamination by heavy metals has become a serious environmental pollution issue today due to its potential threat to plant, wildlife, and human health. Photosynthesis, a process in which light energy is used to produce sugar and other organic compounds, is sensitive to heavy metals. In the present study, the response of photosynthetic process and carbon assimilation of Schima superba was investigated under cadmium (Cd) stress. Three Cd concentrations (0, 300, and 600 mg kg-1) were used designated as control (CK), low Cd (L1), and high Cd treatment (L2) of plants...
February 1, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29380203/cd-and-cu-accumulation-translocation-and-tolerance-in-populus-alba-clone-villafranca-in-autotrophic-in-vitro-screening
#18
Morena Marzilli, Patrick Di Santo, Giuseppe Palumbo, Lucia Maiuro, Bruno Paura, Roberto Tognetti, Claudia Cocozza
The present study investigated accumulation, translocation and tolerance of autotrophic Populus alba clone "Villafranca" in response to excess concentrations of cadmium (Cd) and copper (Cu) provided to the plants. For this purpose, increasing concentrations of Cd (0, 5, 50 and 250 μM) and Cu (0, 5, 50, 250 and 500 μM) were administered to the growth medium in which micropropagated poplar plantlets were exposed to metal treatments for 15 days. Filter bags, instead of the conventional in vitro screening, were applied to improve the experimental design...
January 30, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29367789/stimulation-of-heavy-metal-adsorption-process-by-using-a-strong-magnetic-field
#19
Krzysztof Rajczykowski, Krzysztof Loska
The adsorption process is one of the most important techniques of water and wastewater treatment technology. Therefore, there are many methods allowing to improve the effectiveness of these processes based mainly on the chemical modification of adsorbents. However, they are always associated with the necessity of introducing an additional wastes or sewage to the environment. That is why a purpose of the presented was to investigate an innovative and noninvasive adsorption supporting method based on the using of a static magnetic field...
2018: Water, Air, and Soil Pollution
https://www.readbyqxmd.com/read/29367113/distribution-and-transfer-of-potentially-toxic-metal-loid-s-in-juncus-effusus-from-the-indigenous-zinc-smelting-area-northwest-region-of-guizhou-province-china
#20
Yishu Peng, Jun Chen, Huairui Wei, Shibin Li, Tao Jin, Ruidong Yang
We collected samples (i.e., the aerial parts and roots of Juncus effusus and their growth media) in the indigenous zinc smelting area in the northwest region of Guizhou Province, China, and we measured and analyzed potentially toxic metal(loid)s (arsenic, As; cadmium, Cd; chromium, Cr; copper, Cu; mercury, Hg; lead, Pb and zinc, Zn) in these samples. The results include the following: First, there is a high concentration of one or more potentially toxic metal(loid)s in the slag and surrounding soil in the research area...
January 19, 2018: Ecotoxicology and Environmental Safety
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