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pigmentation by heavy metals

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https://www.readbyqxmd.com/read/28643849/prevalence-of-exposure-of-heavy-metals-and-their-impact-on-health-consequences
#1
Kanwal Rehman, Fiza Fatima, Iqra Waheed, Muhammad Sajid Hamid Akash
Even in the current era of growing technology, the concentration of heavy metals present in drinking water is still not within the recommended limits as set by the regulatory authorities in different countries of the world. Drinking water contaminated with heavy metals namely; arsenic, cadmium, nickel, chromium, mercury, chromium, zinc and lead is becoming a major health concern for public and health care professionals. Occupational exposure to heavy metals is known to occur by the utilization of these metals in various industrial processes and/or contents including color pigments and alloys...
June 23, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28600794/citric-acid-enhanced-the-antioxidant-defense-system-and-chromium-uptake-by-lemna-minor-l-grown-in-hydroponics-under-cr-stress
#2
Rasham Sallah-Ud-Din, Mujahid Farid, Rashid Saeed, Shafaqat Ali, Muhammad Rizwan, Hafiz Muhammad Tauqeer, Syed Asad Hussain Bukhari
Phytoextraction is a cost-effective and eco-friendly technique for the removal of pollutants, mainly heavy metal(loids) especially from polluted water and metal-contaminated soils. The phytoextraction of heavy metals is, in general, limited due to the low availability of heavy metals in the growth medium. Organic chelators can help to improve the phytoextraction by increasing metal mobility and solubility in the growth medium. The present research was carried out to examine the possibility of citric acid (CA) in improving chromium (Cr) phytoextraction by Lemna minor (duckweed)...
June 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28474750/heavy-metal-induced-toxicity-in-the-indian-green-frog-biochemical-and-histopathological-alterations
#3
Uthpala Apekshani Jayawardena, Preethika Angunawela, Deepthi Devika Wickramasinghe, Wanigasekara Daya Ratnasooriya, Preethi Vidya Udagama
Heavy metal contamination may have adverse effects on wetland biota, particularly on amphibians. Severe immunotoxic effects elicited in Euphlyctis hexadactylus (Indian green frog) because of metal exposure (Cd, Cr, Cu, Pb, and Zn) in the Bellanwila-Attidiya Sanctuary, a polluted urban wetland in Sri Lanka, provided the rationale for the present study. We evaluated the biochemical and histopathological effects of this metal contamination with a reference E. hexadactylus population and a laboratory exposure group that was subjected to 28 d of exposure to a mixture of Cd, Cr, Cu, Pb, and Zn (5 ppm in each mixture)...
May 5, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28458244/cadmium-lead-and-bromine-in-beached-microplastics
#4
Angelo Massos, Andrew Turner
Samples of microplastic (n = 924) from two beaches in south west England have been analysed by field-portable-x-ray fluorescence (FP-XRF) spectrometry, configured in a low-density mode and with a small-spot facility, for the heavy metals, Cd and Pb, and the halogen, Br. Primary plastics in the form of pre-production pellets were the principal type of microplastic (>70%) on both beaches, with secondary, irregularly-shaped fragments representing the remainder of samples. Cadmium and Pb were detected in 6...
August 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28455875/effects-of-heavy-metal-pollution-on-pigmented-macrophages-in-kidney-of-vardar-chub-squalius-vardarensis-karaman
#5
Maja Jordanova, Katerina Rebok, Zrinka Dragun, Sheriban Ramani, Lozenka Ivanova, Vasil Kostov, Damir Valić, Nesrete Krasnići, Vlatka Filipović Marijić, Damir Kapetanović
Pollution with heavy metals may influence the immune system of fish, leading to impairment of their health or even increase their mortality. The fish kidney is one of the first fish organs to be affected by water contamination. Amounts of kidney macrophages (MACs), which are involved in fish immune response, as well as the qualitative and quantitative changes in the pigmented MACs in fish kidney, are used as biomarkers of pollution. Therefore, in this study, we have evaluated relative and total volumes of trunk kidney pigmented MACs, and analyzed the pigments accumulated within them...
April 28, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28411512/evaluating-biochemical-response-of-filamentous-algae-integrated-with-different-water-bodies
#6
Abuzer Çelekli, Emine Kapı, Çiğdem Soysal, Hamdullah Arslanargun, Hüseyin Bozkurt
The present study prompted the second attempts to evaluate biochemical responses of filamentous algae under different physico-chemical variables in various water bodies in Turkey. These variables were investigated by use of multivariate approach in the years of 2013 (May and November) and 2014 (May and October). Studied ecoregions had the different geographic position, climate, land-use, and anthropogenic activities, could strongly affect physico-chemical variables of water bodies, which caused to change or regulate in algal biomass composition due to the different response of filamentous species...
August 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28343753/limnothrix-sp-ko05-a-newly-characterized-cyanobacterial-biosorbent-for-cadmium-removal-the-enzymatic-and-non-enzymatic-antioxidant-reactions-to-cadmium-toxicity
#7
Omid Haghighi, Shahab Shahryari, Mojgan Ebadi, Sima Modiri, Hossein Shahbani Zahiri, Hadi Maleki, Kambiz Akbari Noghabi
In this study, we isolated five indigenous cyanobacterial strains from different aqueous environments, with heavy metals contamination, in East Azerbaijan Province (northwest portion of Iran). A strain was identified by morphological and 16S rRNA sequence analysis as Limnothrix sp. KO05 and selected for further studies as having the greatest potential for cadmium uptake. Scanning electron microscopy (SEM) demonstrated cyanobacterium Limnothrix sp. KO05 forms filamentous structures and is straight or curved to some extent...
March 18, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28260133/stoichiometry-and-kinetics-of-mercury-uptake-by-photosynthetic-bacteria
#8
Mariann Kis, Gábor Sipka, Péter Maróti
Mercury adsorption on the cell surface and intracellular uptake by bacteria represent the key first step in the production and accumulation of highly toxic mercury in living organisms. In this work, the biophysical characteristics of mercury bioaccumulation are studied in intact cells of photosynthetic bacteria by use of analytical (dithizone) assay and physiological photosynthetic markers (pigment content, fluorescence induction, and membrane potential) to determine the amount of mercury ions bound to the cell surface and taken up by the cell...
March 4, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28246038/the-wheat-mutant-della-encoding-gene-rht-b1c-affects-plant-photosynthetic-responses-to-cadmium-stress
#9
Anelia G Dobrikova, Ekaterina K Yotsova, Andreas Börner, Svetlana P Landjeva, Emilia L Apostolova
Тhe sensitivity to cadmium (Cd) stress of two near-isogenic wheat lines with differences at the Rht-B1 locus, Rht-B1a (tall wild type, encoding DELLA proteins) and Rht-B1c (dwarf mutant, encoding modified DELLA proteins), was investigated. The effects of 100 μM CdCl2 on plant growth, pigment content and functional activity of the photosynthetic apparatus of wheat seedlings grown on a nutrient solution were evaluated through a combination of PAM chlorophyll fluorescence, oxygen evolution, oxidation-reduction kinetics of P700 and 77 K fluorescence...
May 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28231504/effect-of-biochar-on-cadmium-bioavailability-and-uptake-in-wheat-triticum-aestivum-l-grown-in-a-soil-with-aged-contamination
#10
Tahir Abbas, Muhammad Rizwan, Shafaqat Ali, Muhammad Zia-Ur-Rehman, Muhammad Farooq Qayyum, Farhat Abbas, Fakhir Hannan, Jörg Rinklebe, Yong Sik Ok
Cadmium (Cd) is a well-known and widespread toxic heavy metal while the effects of biochar (BC) on Cd bioavailability and toxicity in wheat, especially in soils with aged contamination are largely unknown. In the present study, the effect of rice straw BC on Cd immobilization in soil and uptake by wheat in an agricultural contaminated-soil was investigated. Different levels of rice straw BC (0%, 1.5%, 3.0% and 5% w/w) were incorporated into the soil and incubated for two weeks. After this, wheat plants were grown in the amended soil until maturity...
June 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28185730/microorganisms-and-heavy-metals-associated-with-atmospheric-deposition-in-a-congested-urban-environment-of-a-developing-country-sri-lanka
#11
Lakshika Weerasundara, R W K Amarasekara, D N Magana-Arachchi, Abdul M Ziyath, D G G P Karunaratne, Ashantha Goonetilleke, Meththika Vithanage
The presence of bacteria and heavy metals in atmospheric deposition were investigated in Kandy, Sri Lanka, which is a typical city in the developing world with significant traffic congestion. Atmospheric deposition samples were analyzed for Al, Cr, Mn, Fe, Ni, Cu, Zn, Cd and Pb which are heavy metals common to urban environments. Al and Fe were found in high concentrations due to the presence of natural sources, but may also be re-suspended by vehicular traffic. Relatively high concentrations of toxic metals such as Cr and Pb in dissolved form were also found...
April 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27965704/magnesium-alleviates-adverse-effects-of-lead-on-growth-photosynthesis-and-ultrastructural-alterations-of-torreya-grandis-seedlings
#12
Jie Shen, Lili Song, Karin Müller, Yuanyuan Hu, Yang Song, Weiwu Yu, Hailong Wang, Jiasheng Wu
Magnesium (Mg(2+)) has been shown to reduce the physiological and biochemical stress in plants caused by heavy metals. To date our understanding of how Mg(2+) ameliorates the adverse effects of heavy metals in plants is scarce. The potential effect of Mg(2+) on lead (Pb(2+)) toxicity in plants has not yet been studied. This study was designed to clarify the mechanism of Mg(2+)-induced alleviation of lead (Pb(2+)) toxicity. Torreya grandis (T. grandis) seedlings were grown in substrate contaminated with 0, 700 and 1400 mg Pb(2+) per kg(-1) and with or without the addition of 1040 mg kg(-1) Mg(2+)...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27936402/influence-of-triethyl-phosphate-on-phosphatase-activity-in-shooting-range-soil-isolation-of-a-zinc-resistant-bacterium-with-an-acid-phosphatase
#13
Sandra Story, Robin L Brigmon
Phosphatase-mediated hydrolysis of organic phosphate may be a viable means of stabilizing heavy metals via precipitation as a metal phosphate in bioremediation applications. We investigated the effect of triethyl phosphate (TEP) on soil microbial-phosphatase activity in a heavy-metal contaminated soil. Gaseous TEP has been used at subsurface sites for bioremediation of organic contaminants but not applied in heavy-metal contaminated areas. Little is known about how TEP affects microbial activity in soils and it is postulated that TEP can serve as a phosphate source in nutrient-poor groundwater and soil/sediments...
March 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27888389/analysis-of-carcinogenic-heavy-metals-in-gallstones-and-its-role-in-gallbladder-carcinogenesis
#14
Bikash Mondal, Dhrubajyoti Maulik, Mousumi Mandal, Gautam Narayan Sarkar, Sanjay Sengupta, Debidas Ghosh
PURPOSE: Gallstone is a high-risk factor for gallbladder pre-malignancy or malignancy (GB PM-M) but which substances of gallstones definitely assist to turn out in to GB PM-M, remains unclear. This study aimed to find out the presence of carcinogenic heavy metals in gallstones and to explore the aetiopathogenesis of gallbladder pre-malignancy and malignancy. METHODS: Presence of elements in gallstones was detected by energy dispersive X-ray spectroscopy (EDS) with scanning electron microscopy (SEM) and then level of carcinogenic heavy metals was estimated in gallstones using atomic absorption spectroscopy (AAS)...
November 26, 2016: Journal of Gastrointestinal Cancer
https://www.readbyqxmd.com/read/27668092/cellulosimicrobium-funkei-like-enhances-the-growth-of-phaseolus-vulgaris-by-modulating-oxidative-damage-under-chromium-vi-toxicity
#15
Chinnannan Karthik, Mohammad Oves, R Thangabalu, Ranandkumar Sharma, S B Santhosh, P Indra Arulselvi
Contamination of agriculture land by heavy metals is a worldwide risk that has sped up noticeably since the beginning of the industrial revolution. Hence, there arise the demands of heavy metal tolerant plant growth promoting bacterial strains for specific metal contaminated agricultural sites restoration. In this study, 36 bacterial isolates were screened out from the rhizospheric soil of Phaseolus vulgaris. Among these, two bacterial strains AR6 and AR8 were selected based on their higher Cr(VI) tolerance (1200 and 1100 μg/mL, respectively) and the maximum production of plant growth promoting substances...
November 2016: Journal of Advanced Research
https://www.readbyqxmd.com/read/27622846/zinc-oxide-nanoparticles-znonps-alleviate-heavy-metal-induced-toxicity-in-leucaena-leucocephala-seedlings-a-physiochemical-analysis
#16
P Venkatachalam, M Jayaraj, R Manikandan, N Geetha, Eldon R Rene, N C Sharma, S V Sahi
The present study describes the role of zinc oxide nanoparticles (ZnONPs) in reversing oxidative stress symptoms induced by heavy metal (Cd and Pb) exposure in Leucaena leucocephala (Lam.) de Wit. Seedling growth was significantly enhanced with the augmentation of ZnONPs following Cd and Pb exposure. Heavy metal accumulations were recorded as 1253.1 mg Cd per kg DW and 1026.8 mg Pb per kg DW for the respective treatments. Results demonstrated that ZnONPs augmentation caused an increase in photosynthetic pigment and total soluble protein contents while a significant decrease in malondialdehyde (MDA-lipid peroxidation) content in leaves...
January 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27590049/overlapping-toxic-effect-of-long-term-thallium-exposure-on-white-mustard-sinapis-alba-l-photosynthetic-activity
#17
Radosław Mazur, Monika Sadowska, Łucja Kowalewska, Agnieszka Abratowska, Hazem M Kalaji, Agnieszka Mostowska, Maciej Garstka, Beata Krasnodębska-Ostręga
BACKGROUND: Heavy metal exposure affect plant productivity by interfering, directly and indirectly, with photosynthetic reactions. The toxic effect of heavy metals on photosynthetic reactions has been reported in wide-ranging studies, however there is paucity of data in the literature concerning thallium (Tl) toxicity. Thallium is ubiquitous natural trace element and is considered the most toxic of heavy metals; however, some plant species, such as white mustard (Sinapis alba L.) are able to accumulate thallium at very high concentrations...
2016: BMC Plant Biology
https://www.readbyqxmd.com/read/27575042/combined-ability-of-chromium-cr-tolerant-plant-growth-promoting-bacteria-pgpb-and-salicylic-acid-sa-in-attenuation-of-chromium-stress-in-maize-plants
#18
Faisal Islam, Tahira Yasmeen, Muhammad Saleem Arif, Muhammad Riaz, Sher Muhammad Shahzad, Qaiser Imran, Irfan Ali
Heavy metal contamination of agricultural soil has become a serious global problem. This study was aimed to evaluate the effects of two chromium (Cr) tolerant plant growth promoting bacteria (PGPB) in combination with salicylic acid (SA) on plant growth, physiological, biochemical responses and heavy metal uptake under Cr contamination. A pot experiment (autoclaved sand as growing medium) was performed using maize (Zea mays L.) as a test crop under controlled conditions. Cr toxicity significantly reduced plant growth, photosynthetic pigment, carbohydrates metabolism and increased H2O2, MDA, relative membrane permeability, proline and Cr contents in maize leaves...
November 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27508982/biochemical-responses-of-filamentous-algae-in-different-aquatic-ecosystems-in-south-east-turkey-and-associated-water-quality-parameters
#19
Abuzer Çelekli, Hamdullah Arslanargun, Çiğdem Soysal, Emine Gültekin, Hüseyin Bozkurt
To the best of our knowledge, any study about biochemical response of filamentous algae in the complex freshwater ecosystems has not been found in the literature. This study was designed to explore biochemical response of filamentous algae in different water bodies from May 2013 to October 2014, using multivariate approach in the South East of Turkey. Environmental variables were measured in situ: water temperature, oxygen concentration, saturation, conductivity, salinity, pH, redox potential, and total dissolved solid...
November 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27508309/inoculation-of-brassica-oxyrrhina-with-plant-growth-promoting-bacteria-for-the-improvement-of-heavy-metal-phytoremediation-under-drought-conditions
#20
Ying Ma, Mani Rajkumar, Chang Zhang, Helena Freitas
The aim of this study was to investigate the effects of drought resistant serpentine rhizobacteria on plant growth and metal uptake by Brassica oxyrrhina under drought stress (DS) condition. Two drought resistant serpentine rhizobacterial strains namely Pseudomonas libanensis TR1 and Pseudomonas reactans Ph3R3 were selected based on their ability to stimulate seedling growth in roll towel assay. Further assessment on plant growth promoting (PGP) parameters revealed their ability to produce indole-3-acetic acid, siderophore and 1-aminocyclopropane-1-carboxylate deaminase...
December 15, 2016: Journal of Hazardous Materials
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