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pigmentation by heavy metals

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https://www.readbyqxmd.com/read/29778831/black-plastics-linear-and-circular-economies-hazardous-additives-and-marine-pollution
#1
REVIEW
Andrew Turner
Black products constitute about 15% of the domestic plastic waste stream, of which the majority is single-use packaging and trays for food. This material is not, however, readily recycled owing to the low sensitivity of black pigments to near infrared radiation used in conventional plastic sorting facilities. Accordingly, there is mounting evidence that the demand for black plastics in consumer products is partly met by sourcing material from the plastic housings of end-of-life waste electronic and electrical equipment (WEEE)...
May 17, 2018: Environment International
https://www.readbyqxmd.com/read/29737961/toxicity-assessment-of-cobalt-ferrite-nanoparticles-on-wheat-plants
#2
J López-Luna, M M Camacho-Martínez, F A Solís-Domínguez, M C González-Chávez, R Carrillo-González, S Martinez-Vargas, O F Mijangos-Ricardez, M C Cuevas-Díaz
Cobalt ferrite nanoparticles (NPs) have received increasing attention due to their widespread therapeutic and agricultural applicability. In the environmental field, dry powder- and ferrofluid-suspended cobalt ferrite NPs were found to be useful for removing heavy metals and metalloids from water, while diluted suspensions of cobalt ferrite NP have been promisingly applied in medicine. However, the potential toxicological implications of widespread exposure are still unknown. Since cobalt ferrite NPs are considered residual wastes of environmental or medical applications, plants may serve as a point-of-entry for engineered nanomaterials as a result of consumption of these plants...
May 8, 2018: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/29696542/comparative-analysis-of-cadmium-induced-stress-responses-by-the-aromatic-and-non-aromatic-rice-genotypes-of-west-bengal
#3
Snehalata Majumdar, Bratati Chakraborty, Rita Kundu
Constant exposure of the living ecosystems to heavy metals, like cadmium (Cd), induces a detectable change at the biochemical and genetic level. Repeated application of phosphate fertilizers in paddy fields, leads to increase in Cd content of soil. Cd being highly mobile is transported to shoot and grain, thereby entering into the food chain of animal system. In the present study, treatment of 7-day old rice seedlings with 10 μM cadmium chloride resulted in Cd toxicity across the seven non-aromatic and six aromatic rice cultivars and landraces used for the study...
April 25, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29674805/ectomycorrhizal-and-endophytic-fungi-associated-with-alnus-glutinosa-growing-in-a-saline-area-of-central-poland
#4
Dominika Thiem, Agnieszka Piernik, Katarzyna Hrynkiewicz
Alnus glutinosa (black alder) is a mycorrhizal pioneer tree species with tolerance to high concentrations of salt in the soil and can therefore be considered to be an important tree for the regeneration of forests areas devastated by excessive salt. However, there is still a lack of information about the ectomycorrhizal fungi (EMF) associated with mature individuals of A. glutinosa growing in natural saline conditions. The main objective of this study was to test the effect of soil salinity and other physicochemical parameters on root tips colonized by EMF, as well as on the species richness and diversity of an EMF community associated with A...
2018: Symbiosis
https://www.readbyqxmd.com/read/29673973/using-agro-industrial-wastes-for-the-cultivation-of-microalgae-and-duckweeds-contamination-risks-and-biomass-safety-concerns
#5
REVIEW
Giorgos Markou, Liang Wang, Jianfeng Ye, Adrian Unc
Aquatic organisms, such as microalgae (Chlorella, Arthrospira (Spirulina), Tetrasselmis, Dunalliela etc.) and duckweed (Lemna spp., Wolffia spp. etc.) are a potential source for the production of protein-rich biomass and for numerous other high-value compounds (fatty acids, pigments, vitamins etc.). Their cultivation using agro-industrial wastes and wastewater (WaW) is of particular interest in the context of a circular economy, not only for recycling valuable nutrients but also for reducing the requirements for fresh water for the production of biomass...
April 16, 2018: Biotechnology Advances
https://www.readbyqxmd.com/read/29655849/effect-of-cadmium-on-morphometric-traits-antioxidant-enzyme-activity-and-phytochelatin-synthase-gene-expression-sopcs-of-saccharum-officinarum-var-cp48-103-in-vitro
#6
Z Yousefi, M Kolahi, A Majd, P Jonoubi
Cadmium is an important environmental pollutant which genetically, physiologically and biochemically affects the cell. Phytochelatins (PC) are involved in one of the phytoremediation mechanisms, in which they are able to bind heavy metals, such as cadmium. The objective of this study was to evaluate morphometric, antioxidant enzyme activity, and SoPCS gene expression in sugarcane growing under cadmium stress. After propagation, samples were cultured in triplicate for 14 days in modified MS medium containing CdCl2 (100, 250, 500 µmol)...
April 12, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29560590/interaction-of-24-epibrassinolide-and-salicylic-acid-regulates-pigment-contents-antioxidative-defense-responses-and-gene-expression-in-brassica-juncea-l-seedlings-under-pb-stress
#7
Sukhmeen Kaur Kohli, Neha Handa, Anket Sharma, Vandana Gautam, Saroj Arora, Renu Bhardwaj, Leonard Wijaya, Mohammed Nasser Alyemeni, Parvaiz Ahmad
Lead (Pb) is considered one the most hazardous pollutant, and its accumulation in soil and plants is of prime concern. To understand the role of plant hormones in combating heavy metal stress, the present study was planned to assess the interactive effects of 24-epibrassinolide (EBL) (10-7  M) and salicylic acid (SA) (1 mM) in regulating growth, pigment contents, antioxidative defense response, and gene expression in Brassica juncea L. seedlings exposed to different concentrations of Pb metal (0.25, 0.50, and 0...
March 20, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29532376/comparative-study-on-the-toxic-effects-of-some-heavy-metals-on-the-nile-tilapia-oreochromis-niloticus-in-the-middle-delta-egypt
#8
Abeer A Alm-Eldeen, Thoria Donia, Salma Alzahaby
Heavy metals are the most dangerous hazards affecting aquatic biota in Egypt specially the Nile Tilapia, Oreochromis niloticus, which is an important species in commercial fisheries. Some areas were not fully studied to screen the hazards that may affect this economic fish. Therefore, the present study aimed to evaluate the potential hazards of heavy metals on O. niloticus in Al-Gharbiya Governorate in the Middle delta of Egypt. Water and fish samples were collected from Al-Qased canal, Kafr El-Zayaat Nile, El-Maash canal in Al-Gharbiya Governorate plus a reference site which is a fish farm at the Faculty of Agriculture, Damietta University, Damitta Governorate, Egypt...
March 12, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29529561/performance-of-three-cardoon-cultivars-in-an-industrial-heavy-metal-contaminated-soil-effects-on-morphology-cytology-and-photosynthesis
#9
M C Sorrentino, F Capozzi, C Amitrano, S Giordano, C Arena, V Spagnuolo
In the present work the cytomorphological and physiological effects on three cardoon cultivars - Sardo, Siciliano, Spagnolo - grown in a metal-polluted soil, were investigated, to assess the traits concurring to the high tolerance to metal stress observed in cv. Spagnolo compared to the other two cultivars. The plants were grown for one month on a real polluted soil collected at a dismantling battery plant, highly enriched by heavy metals, especially Cd and Pb, and their leaves were analyzed by a multidisciplinary approach...
June 5, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29450951/studies-on-lead-and-cadmium-toxicity-in-dianthus-carthusianorum-calamine-ecotype-cultivated-in-vitro
#10
E Muszyńska, E Hanus-Fajerska, K Ciarkowska
Information on metallophytes during reclamation of land contaminated with heavy metals is sparse. We investigated the response of D. carthusianorum calamine ecotype to Pb and Cd stress. We focused on in vitro selection of tolerant plant material for direct use in chemically degraded areas. Shoot cultures were treated with various concentrations of Pb or Cd ions. Plantlet status was estimated as micropropagation efficiency, growth tolerance index (GTI) and through physiological analysis. Moreover, determination of plant Pb, Cd and other elements was performed...
May 2018: Plant Biology
https://www.readbyqxmd.com/read/29407738/effects-of-treated-industrial-wastewaters-and-temperatures-on-growth-and-enzymatic-activities-of-duckweed-lemna-minor-l
#11
E Basiglini, M Pintore, C Forni
The efficacy of the removal of contaminants from wastewater depends on physico-chemical properties of pollutants and the efficiency of treatment plant. Sometimes, low amounts of toxic compounds can be still present in the treated sewage. In this work we considered the effects of contaminant residues in treated wastewaters and of temperatures on Lemna minor L. Treated effluent waters were collected, analyzed and used as duckweed growth medium. In order to better understand the effects of micropollutants and seasonal variation, the plants were grown under ambient conditions for seven days in summer and winter...
May 30, 2018: Ecotoxicology and Environmental Safety
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/29398730/differential-tolerance-to-lead-and-cadmium-of-micropropagated-gypsophila-fastigiata-ecotype
#13
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/29329098/effect-of-organic-amendments-on-cadmium-stress-to-pea-a-multivariate-comparison-of-germinating-vs-young-seedlings-and-younger-vs-older-leaves
#14
Saliha Shamshad, Muhammad Shahid, Marina Rafiq, Sana Khalid, Camille Dumat, Muhammad Sabir, Behzad Murtaza, Abu Bakr Umer Farooq, Noor S Shah
Despite significant recent advancement in research, biogeochemical behavior of heavy metals with respect to their applied form is still topical. Moreover, metal toxicity to plants may vary with their stage of development/maturity. Therefore, this study for the first time evaluated the influence of ethylenediaminetetraacetic acid (EDTA) and citric acid (CA) on cadmium (Cd) accumulation and toxicity to germinating and young pea seedlings as well as in younger and older leaves. The experimental setup of current study consisted of two separate studies...
April 30, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29318746/pigmented-macrophages-and-related-aggregates-in-the-spleen-of-european-sea-bass-dosed-with-heavy-metals-ultrastructure-and-explorative-morphometric-analysis
#15
Maurizio Manera, Bahram Sayyaf Dezfuli, Joseph A DePasquale, Luisa Giari
The ultrastructure and morphometrics of pigmented macrophages (PMs) were assessed in the spleen of European sea bass experimentally dosed with Cd and Hg. PMs occurred either as solitary cells or as variably structured aggregations, defined as macrophage aggregates (MAs). Light microscopy revealed a high degree of morphological heterogeneity amongst MAs of all experimental groups. At the ultrastructural level, MAs showed a heterogeneous pigment content that was not influenced by the treatment. Cytoplasm rarefaction/vacuolation and euchromatic nuclei, were observed in PMs of dosed fish...
April 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29277314/molecular-dynamics-of-palmitic-acid-and-lead-palmitate-in-cross-linked-linseed-oil-films-implications-from-deuterium-magnetic-resonance-for-lead-soap-formation-in-traditional-oil-paintings
#16
Jaclyn Catalano, Anna Murphy, Yao Yao, Nicholas Zumbulyadis, Silvia A Centeno, Cecil Dybowski
Many oil paintings, dating from the 15th century to the present, are affected by the formation of heavy-metal carboxylates (soaps) that alter the structural integrity and appearance of the works. Through transport phenomena not yet understood, free fatty acids formed from oils used as binders migrate through the paint film and react with heavy-metal ions that are constituents of pigments and/or driers, forming metal carboxylates. The local molecular dynamics of fatty acids and metal carboxylates are factors influencing material transport in these systems...
February 2018: Solid State Nuclear Magnetic Resonance
https://www.readbyqxmd.com/read/29177781/bioaccumulation-of-selected-heavy-metals-and-histopathological-and-hematobiochemical-alterations-in-backyard-chickens-reared-in-an-industrial-area-india
#17
Indrajit Kar, Sunit Kumar Mukhopadhayay, Amlan Kumar Patra, Saktipada Pradhan
This study was carried out to determine the concentrations of four heavy metals, cadmium (Cd), lead (Pb), copper (Cu), and cobalt (Co), and histopathological lesions in tissues of chickens reared in an industrial area of West Bengal, India. In particular, Mejhia Block was selected as a heavy metal-exposed area and Vatar Block (120 km away from industrially polluted areas) as a reference site. Samples were collected from the backyard chickens in these areas. Concentrations of heavy metals in soil, water, feedstuffs, tissues (liver, kidney, spleen, lung, and muscle), and droppings were greater (p < 0...
February 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29124423/effects-of-mutual-intercropping-on-the-cadmium-accumulation-in-accumulator-plants-stellaria-media-malachium-aquaticum-and-galium-aparine
#18
Qiyu Lu, Jianhua Li, Fabo Chen, Ming'an Liao, Lijin Lin, Yi Tang, Dong Liang, Hui Xia, Yunsong Lai, Xun Wang, Cheng Chen, Wei Ren
Intercropping affects heavy-metal uptake in plants. In this study, three cadmium (Cd)-accumulator species (Stellaria media, Malachium aquaticum, and Galium aparine) were intercropped together in Cd-contaminated soil to study the effects of intercropping on co-remediation. Mutual intercropping significantly increased the biomasses of S. media, M. aquaticum, and G. aparine compared with their respective monocultures. The photosynthetic pigment contents of three species were not significantly affected by mutual intercropping...
November 9, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29053350/melatonin-affects-the-growth-and-cadmium-accumulation-of-malachium-aquaticum-and-galinsoga-parviflora
#19
Yi Tang, Lijin Lin, Yongdong Xie, Ji Liu, Guochao Sun, Huanxiu Li, Ming'an Liao, Zhihui Wang, Dong Liang, Hui Xia, Xun Wang, Jing Zhang, Zejing Liu, Zhi Huang, Zhongqun He, Lihua Tu
Phytoremediation technology has become one of the main techniques for remediating soils polluted by heavy metals because it does not damage the environment, but heavy metal-tolerant plants have the disadvantages of low biomass and slow growth. A pot experiment was conducted to study the effects of melatonin (Mel) on growth and cadmium (Cd) accumulation in the Cd accumulator Malachium aquaticum and hyperaccumulator Galinsoga parviflora by spraying different concentrations of Mel on them. The results showed that shoot biomass, photosynthetic pigment content and antioxidant enzyme activity were increased in both species after Mel was sprayed on their leaves...
October 20, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29018594/comparative-study-of-cd-uptake-and-tolerance-of-two-italian-ryegrass-lolium-multiflorum-cultivars
#20
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
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