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pigmentation by heavy metals

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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
#1
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...
February 20, 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
#2
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...
February 6, 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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
https://www.readbyqxmd.com/read/27498497/variation-in-antioxidant-enzyme-activities-growth-and-some-physiological-parameters-of-bitter-melon-momordica-charantia-under-salinity-and-chromium-stress
#12
Mahsa Bahrami, Mostafa Heidari, Hadi Ghorbani
In general, salinity and heavy metals interfere with several physiological processes and reduce plant growth. In order to evaluate of three levels of salinity (0, 4 and 8 ds m(-1)) and three concentration of chromium (0, 10 and 20 mg kg(-1) soil) in bitter melon (Momordica charantia), a plot experiment was conducted in greenhouse at university of Shahrood, Iran. The results revealed that chromium treatment had no significant affect on fresh and dry weight, but salinity caused reduction of fresh and dry weight in growth parameter...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/27400061/oxidative-stress-and-antioxidant-responses-to-increasing-concentrations-of-trivalent-chromium-in-the-andean-crop-species-chenopodium-quinoa-willd
#13
Valeria Scoccianti, Anahi E Bucchini, Marta Iacobucci, Karina B Ruiz, Stefania Biondi
Quinoa (Chenopodium quinoa Willd), an ancient Andean seed crop, exhibits exceptional nutritional properties and resistance to abiotic stress. The species' tolerance to heavy metals has, however, not yet been investigated nor its ability to take up and translocate chromium (Cr). This study aimed to investigate the metabolic adjustments occurring upon exposure of quinoa to several concentrations (0.01-5mM) of CrCl3. Young hydroponically grown plants were used to evaluate Cr uptake, growth, oxidative stress, and other biochemical parameters three and/or seven days after treatment...
November 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27392629/trajectories-of-river-chemical-quality-issues-over-the-longue-dur%C3%A3-e-the-seine-river-1900s-2010
#14
M Meybeck, L Lestel, C Carré, G Bouleau, J Garnier, J M Mouchel
River quality trajectories are presented for (i) organic pollution, (ii) eutrophication, (iii) nitrate pollution, and (iv) metal contamination over the Longue Durée (130 to 70 years). They are defined by a quantified state indicator (S) specific to each issue, compared to drivers (D) or pressures (P) and to social responses (R) that reflect the complex interactions between society and river quality. The Lower Seine River, naturally sensitive to anthropogenic pressures, greatly impacted by Paris urban growth, industrialization, and intensive agriculture, and well documented by the PIREN-Seine 25-year research program, was chosen to illustrate these trajectories...
July 9, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27363169/-effect-of-arbuscular-mycorrhiza-am-on-tolerance-of-cattail-to-cd-stress-in-aquatic-environment
#15
Peng-cheng Luo, Hang Li, Shu-guang Wang
Hygrophytes are planted more and more in landscaping and greening in many cities, but they often encounter threat from environmental pollution. Arbuscular mycorrhiza ( AM ) have been confirmed to enhance the tolerance of terrestrial plants to environmental pollution in many previous studies, but it is unclear how they affect hygrophytes. In the present study, a hydroponic culture experiment was carried out to investigate the effects of AM fungi (Glomus etunicatum) inoculation on the tolerance of cattail (Typha latifolia) to different concentrations Cd2+ (0, 2...
February 15, 2016: Huan Jing Ke Xue= Huanjing Kexue
https://www.readbyqxmd.com/read/27344559/health-hazards-and-heavy-metals-accumulation-by-summer-squash-cucurbita-pepo-l-cultivated-in-contaminated-soils
#16
Tarek M Galal
The present study was carried out to investigate the heavy metal concentration accumulated by summer squash cultivated in contaminated soil and their health hazards for public consumers at south Cairo Province, Egypt. Soil and plants were sampled from contaminated and reference farms, using 1 m(2) quadrats, for biomass estimation and nutrient analysis. The daily intake of metals (DIM) and health risk index (HRI) were estimated. Significant differences in soil variables (except As) between contaminated and reference sites were recognized...
July 2016: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27307203/investigating-the-effect-of-cadmium-and-aluminium-on-growth-and-stress-induced-responses-in-the-micropropagated-medicinal-plant-hypoxis-hemerocallidea
#17
A Okem, M Moyo, W A Stirk, J F Finnie, J Van Staden
Hypoxis hemerocallidea is a highly utilized medicinal plant in South Africa. Its cultivation has received considerable attention in order to meet the high demand. High levels of cadmium (Cd) and aluminum (Al) in H. hemerocallidea plants sold in traditional medicinal markets was previously reported. The present study used an in vitro propagation model to investigate the uptake of Cd and Al by H. hemerocallidea and their effect on plant growth, elemental uptake and some stress-induced responses such as pigment, malondialdehyde (MDA), proline content and ultrastructural changes...
September 2016: Plant Biology
https://www.readbyqxmd.com/read/27295923/growth-response-modulation-by-putrescine-in-indian-mustard-brassica-juncea-l-under-multiple-stress
#18
Nita Lakra, Pushpa C Tomar, S N Mishra
Plants, in general, are put to various kinds of stress, biotic and abiotic, both natural and manmade. Infestation by insect pests and diseases, and extreme conditions such as salinity, temperature, etc., as well as heavy metal contamination affect their growth performance. Here, we studied the impact of salinity and heavy metal pollution on the growth performance of Indian Mustard Brassica juncea L. and its amelioration by the diamine, putrescine, a known media supplement. We evaluated the putrescine (Put) modulation potential on multiple stress effect in 7-day old Indian mustard...
April 2016: Indian Journal of Experimental Biology
https://www.readbyqxmd.com/read/27255310/effects-of-organic-acids-on-the-photosynthetic-and-antioxidant-properties-and-accumulations-of-heavy-metals-of-melilotus-officinalis-grown-in-cu-tailing
#19
Yulin Han, Xue Wu, Jiguang Gu, Jiuzhou Zhao, Suzhen Huang, Haiyan Yuan, Jiajia Fu
The effect of citric acid (CA), acetic acid (Ac), and ethylene diamine tetraacetic acid (EDTA) on the photosynthetic and antioxidant properties and the accumulation of some heavy metals (HMs) of Melilotus officinalis seedling growing in Cu mine tailings for 25 days were studied. Results showed that the formation of photosynthesizing cells of M. officinalis was inhibited by EDTA at 2 mmol/kg. Photosynthetic pigment contents under EDTA of 2 mmol/kg were reduced by 26, 40, and 19 %, respectively, compared to the control...
September 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27209215/physiological-and-nutritional-status-of-black-oat-avena-strigosa-schreb-grown-in-soil-with-interaction-of-high-doses-of-copper-and-zinc
#20
Tadeu L Tiecher, Tales Tiecher, Carlos A Ceretta, Paulo A A Ferreira, Fernando T Nicoloso, Hilda H Soriani, Adriele Tassinari, Juçara Terezinha Paranhos, Lessandro De Conti, Gustavo Brunetto
Vineyard sandy acid soils from South Brazil have experienced heavy metal contamination due to replacement of copper (Cu)-based by zinc (Zn)-based products to control foliar diseases. Thus, we evaluate physiological and nutritional status of black oat (Avena strigosa Schreb.), a common interrow crop in vineyards from this region. Soil was collected in a natural field from Santana do Livramento, in Rio Grande do Sul, the southernmost state of Brazil. Black oat was cultivated for 30 days in a greenhouse with application of 0, 30, and 60 mg Cu kg(-1) combined with 0, 15, 30, 60, 120, and 180 mg Zn kg(-1)...
September 2016: Plant Physiology and Biochemistry: PPB
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