Comparative study of alleviation effects of DMTU and PCIB on root growth inhibition in two tall fescue varieties under cadmium stress.
In this study, the effects of dimethylthiourea (DMTU, a H2O2 scavenger) and p-chlorophenoxy isobutyric acid (PCIB, an IAA signaling inhibitor) on root growth, endogenous hormones and antioxidant system were investigated to decipher how DMTU and PCIB treatments alleviate the inhibition of root elongation in Cd-resistant (Commander) and -sensitive (Crossfire III) tall fescue varieties under Cd stress. Both varieties subjected to 10 μM Cd treatments for 12 h presented a substantial decrease in root elongation coupled with a reduction in brassinosteroid (BR) and zeatin riboside (ZR) contents, but the changes in IA...
Source: Ecotoxicology and Environmental Safety - March 30, 2020 Category: Environmental Health Authors: Han M, Wang B, Song G, Shi S Tags: Ecotoxicol Environ Saf Source Type: research

Occurrence and distribution of microplastics and polychlorinated biphenyls in sediments from the Qiantang River and Hangzhou Bay, China.
Abstract Rivers are important routes for sea-bound microplastics. Thus, this study investigated the occurrences and distributions of microplastics and polychlorinated biphenyls (PCBs) in sediment samples from the Qiantang River (QR) and Hangzhou Bay (HZ) and analyzed the correlation between microplastics and PCBs. A total of 15 sampling sites were selected, including eight from the QR (i.e., four in the Tonglu area and four in the Fuyang area), two from the Andong salt marsh (ASM; located in a hydrodynamic turning point of the HZ), and five from HZ. The mean microplastic abundance was highest in the QR, followed b...
Source: Ecotoxicology and Environmental Safety - March 29, 2020 Category: Environmental Health Authors: Fraser MA, Chen L, Ashar M, Huang W, Zeng J, Zhang C, Zhang D Tags: Ecotoxicol Environ Saf Source Type: research

Fungal community composition change and heavy metal accumulation in response to the long-term application of anaerobically digested slurry in a paddy soil.
In this study, we conducted a field experiment over 10 years to assess the changes in soil HMs and fungal community composition under the long-term application of ADS in a paddy field. The four treatments were (1) no fertilizer (CK); (2) mineral fertilizer and 270 kg N ha-1 from urea (MF); (3) 270 kg N ha-1 from ADS (ADS1); and (4) 540 kg N ha-1 from ADS (ADS2). The results revealed that ADS application improved paddy soil fertility compared to that under the MF treatment by increasing soil organic C (SOC), total N (TN) and available potassium (AK). Long-term application of ADS significantly i...
Source: Ecotoxicology and Environmental Safety - March 28, 2020 Category: Environmental Health Authors: Chen Z, Wang Q, Ma J, Zou P, Yu Q, Jiang L Tags: Ecotoxicol Environ Saf Source Type: research

Ageing alters the physicochemical properties of silver nanoparticles and consequently compromises their acute toxicity in mammals.
This study would provide new insights into the potential health impacts of AgNPs under transformation-determined exposure scenarios. PMID: 32229327 [PubMed - as supplied by publisher] (Source: Ecotoxicology and Environmental Safety)
Source: Ecotoxicology and Environmental Safety - March 28, 2020 Category: Environmental Health Authors: Wang Z, Li Q, Xu L, Ma J, Wang Y, Wei B, Wu W, Liu S Tags: Ecotoxicol Environ Saf Source Type: research

Effects of maternal T-2 toxin exposure on the hepatic glycolipid metabolism in young mice.
Abstract T-2 toxin is a kind of group A trichothecenes mycotoxins, frequently detected in various foods and feeds, having high toxic effects on both humans and animals. The present study aims to investigate the toxic effects of T-2 toxin exposure to ICR mice during pregnancy and lactation on liver glycolipid metabolism of young mice. The pregnant mice were given 0, 0.005 and 0.05 mg of T-2 toxin/kg bw daily through oral gavage from late gestation (GD 14) to the lactation (LD 21). Liver and serum samples of the young mice were collected on postnatal day 21 (PND 21), PND 28 and PND 56. The results showed that T...
Source: Ecotoxicology and Environmental Safety - March 28, 2020 Category: Environmental Health Authors: Kang R, Perveen A, Li C Tags: Ecotoxicol Environ Saf Source Type: research

Two distinct mechanisms of fluoride enrichment and associated health risk in springs' water near an inactive volcano, southeast Iran.
Abstract Groundwater fluoride contamination is a major issue of water pollution in the world with health hazards such as dental and skeletal fluorosis. This research focused on exposure to the high concentration of fluoride in the springs water in the Bazman volcanic area, southeast Iran. The combination of chemical/isotopic analysis, geochemical modeling, health risk assessment and multivariate statistical methods were applied to investigate the contamination and sources of fluoride in the samples. Groundwater samples were collected from cold and thermal springs. Major ions, fluoride, trace elements and stable is...
Source: Ecotoxicology and Environmental Safety - March 28, 2020 Category: Environmental Health Authors: Naderi M, Jahanshahi R, Dehbandi R Tags: Ecotoxicol Environ Saf Source Type: research

Application of multivariate data techniques in photochemical study of polycyclic aromatic hydrocarbons (PAHs) and transformed PAH products in road dust.
This study evaluated the role of 254 nm ultraviolet (UV) photons on the photochemistry of PAHs and TPPs in road dust. The findings show that UV irradiation had varying effects on the fate of analytes, particularly naphthalene (NAP), phenanthrene (PHE), 7, 12-dimethylbenz(a)anthracene (DMBA), 1-hydroxypyrene (HPY), 1-nitropyrene (1NPY), pyrene (PYR) and 5-nitroacenaphthene (5NAC). Photochemical relationship was identified between PYR, 1NPY and HPY, and DMBA and benzo(a)anthracene. Unlike carbonyl-PAHs, parent PAHs, nitro-PAHs and hydroxy-PAHs can originate from photolysis. Photon irradiation durations of 3, 6 and 7.5&n...
Source: Ecotoxicology and Environmental Safety - March 27, 2020 Category: Environmental Health Authors: Gbeddy G, Goonetilleke A, Ayoko GA, Egodawatta P Tags: Ecotoxicol Environ Saf Source Type: research

Photocatalytic degradation of methylene blue dye by fluorite type Fe2Zr2-xWxO7 system under visible light irradiation.
Abstract Nano-sized Fe2Zr2-xWxO7 system was prepared using the Pacini method where x = 0, 0.05, 0.1 and 0.15. All the samples were characterized using chemical analysis, X-ray diffraction (XRD), Fourier-transform infrared (FT-IR), transmission electron microscopy (TEM), UV-vis diffuse reflectance measurements (DRS) and surface area measurements. The undoped Fe2Zr2O7 was crystallised in the cubic fluorite phase as a major phase in addition to rhombohedral phase of Fe2O3 and monoclinic phase of ZrO2 as the minor phases. Meanwhile, single cubic fluorite phase was defined for Fe2Zr0.85W0.15O7 sample. The las...
Source: Ecotoxicology and Environmental Safety - March 27, 2020 Category: Environmental Health Authors: Abbas HA, Nasr RA, Khalaf A, Al Bawab A, Jamil TS Tags: Ecotoxicol Environ Saf Source Type: research

Simulated sulfuric and nitric acid rain inhibits leaf breakdown in streams: A microcosm study with artificial reconstituted fresh water.
In conclusion, the ratio of SO42- and NO3- in acid rain was an important factor that could have a profound impact on leaf breakdown, even on ecosystem structure and functioning of streams. PMID: 32224368 [PubMed - as supplied by publisher] (Source: Ecotoxicology and Environmental Safety)
Source: Ecotoxicology and Environmental Safety - March 27, 2020 Category: Environmental Health Authors: Du J, Qv M, Zhang Y, Cui M, Zhang H Tags: Ecotoxicol Environ Saf Source Type: research

Distribution, seasonal trends, and lung cancer risk of atmospheric polycyclic aromatic hydrocarbons in North China: A three-year case study in Dalian city.
Abstract Atmospheric monitoring data of polycyclic aromatic hydrocarbons (PAHs) over a three-year period were collected from an urban site in Dalian, northeast China. The status of PAHs in the atmosphere in Dalian were evaluated by assessing concentration levels, congener profiles, seasonal trends, primary source, inhalation exposure and the risk of developing lung cancer risk. Average concentrations were recorded for 53 PAHs (95 ± 40 ng/m3), 16 EPA priority PAHs (68 ± 33 ng/m3), 26 alkylated PAHs (17 ± 7.6 ng/m3) and 4 high-molecular-weight (302&nb...
Source: Ecotoxicology and Environmental Safety - March 27, 2020 Category: Environmental Health Authors: Hong WJ, Jia H, Yang M, Li YF Tags: Ecotoxicol Environ Saf Source Type: research

Selenium-silicon (Se-Si) induced modulations in physio-biochemical responses, grain yield, quality, aroma formation and lodging in fragrant rice.
Abstract Fragrant rice is a high-valued quality rice type which is gaining much popularity over the globe due to its better cooking qualities and special aromatic characteristics. Selenium (Se) and silicon (Si) could improve the growth and yield of rice; however, the combine effects of Se and Si (Se-Si treatments) on rice grain quality, aroma and lodging in fragrant rice were rarely investigated. The pot and field experiments were conducted with two fragrant rice cultivars i.e., Xiangyaxiangzhan and Yuxiangyouzhan, grown under three Se levels i.e., 0, 120, and 240 mg kg-1 of soil (for pot experiment) and...
Source: Ecotoxicology and Environmental Safety - March 27, 2020 Category: Environmental Health Authors: Liu X, Huang Z, Li Y, Xie W, Li W, Tang X, Ashraf U, Kong L, Wu L, Wang S, Mo Z Tags: Ecotoxicol Environ Saf Source Type: research

Airborne environmental fine particles induce intense inflammatory response regardless of the absence of heavy metal elements.
This study intends to address this gap and provides a detailed characterization and immunotoxicity evaluation of PM collected in an urban area with heavy traffic congestion. Environmental particles were separated by different sizes though a sucrose gradient. This method allowed to achieve 4 sized fractions: EP f 15 % with a mean diameter of 284 nm ± 1.86 nm, EP f 25 % with a mean diameter of 461 nm ± 1.72 nm, EP f 35 % with a mean diameter of 1845 nm ± 251 nm and EP f 45 % with a mean diameter of 2204 nm ± 310 nm. On...
Source: Ecotoxicology and Environmental Safety - March 26, 2020 Category: Environmental Health Authors: Colaço M, Duarte A, Zuzarte M, Costa BFO, Borges O Tags: Ecotoxicol Environ Saf Source Type: research

Bacterial communities on soil microplastic at Guiyu, an E-Waste dismantling zone of China.
This study provides a new perspective for exploring microplastic-associated bacteria and increasing our understanding of microplastic pollution in terrestrial ecosystems. PMID: 32222597 [PubMed - as supplied by publisher] (Source: Ecotoxicology and Environmental Safety)
Source: Ecotoxicology and Environmental Safety - March 26, 2020 Category: Environmental Health Authors: Chai B, Li X, Liu H, Lu G, Dang Z, Yin H Tags: Ecotoxicol Environ Saf Source Type: research

The effects of chronic cadmium exposure on the gut of Bufo gargarizans larvae at metamorphic climax: Histopathological impairments, microbiota changes and intestinal remodeling disruption.
In this study, we examined the effects of chronic cadmium exposure on the gut of tadpoles at Gosner stage 42 of metamorphic climax by using Bufo gargarizans as a model species. Tadpoles were exposed to cadmium concentrations at 0, 5, 100 and 200 μg L-1 from Gosner stage 26-42. The results showed that high cadmium (100 and 200 μg L-1) exposure caused significant decrease of body length and weight but significant increase of intestinal length and weight. Moreover, severe histopathological damages were induced by high Cd exposure. In addition, microbial communities in the gut of tadpoles in high cadm...
Source: Ecotoxicology and Environmental Safety - March 26, 2020 Category: Environmental Health Authors: Ya J, Li X, Wang L, Kou H, Wang H, Zhao H Tags: Ecotoxicol Environ Saf Source Type: research

Tolerance evaluation and morphophysiological responses of Astronium graveolens, a native brazilian Cerrado, to addition of lead in soil.
Abstract Since the ecosystem is contaminated by lead, decontamination is a difficult and expensive process. Therefore, an alternative would be the use of phytoremediation plants, which have been studied more intensely in recent decades. Astronium graveolens Jacq (Anacardiaceae) is a Cerrado native species and plants of this biome are known to present adaptations and modifications that keep them in this ecosystem. Our aim was to find the tolerance index of A. graveolens to lead doses and to evaluate the morphophysiological alterations of the species when exposed to the heavy metal. The experiment was carried out in...
Source: Ecotoxicology and Environmental Safety - March 25, 2020 Category: Environmental Health Authors: Araujo MA, Leite MCM, Camargos LS, Martins AR Tags: Ecotoxicol Environ Saf Source Type: research

Comparative metal accumulation and toxicogenetic damage induction in three neotropical fish species with distinct foraging habits and feeding preferences.
Abstract Environmental pollutants affect fish species differently because their routes of exposure make them more critical to a specific group regarding foraging habits or food preferences. However, the association between local problems and environmental conditions makes a particular species more suitable for use in monitoring programs. Thus, this study compared muscle accumulation of metals (Al, Ba, Cr, Cu, Fe, Mn, Ti and Zn) and toxicogenetic damage to three neotropical species from the Itapemirim River Basin (Brazil) with distinct foraging habits and feeding preferences: Geophagus brasiliensis (benthopelagic -...
Source: Ecotoxicology and Environmental Safety - March 25, 2020 Category: Environmental Health Authors: Lacerda D, Vergilio CDS, da Silva Souza T, Viana Costa LH, Rangel TP, Vaz de Oliveira BC, Ribeiro de Almeida DQ, Pestana IA, Gomes de Almeida M, de Rezende CE Tags: Ecotoxicol Environ Saf Source Type: research

Sediment toxicity of the fungicide fludioxonil to benthic macroinvertebrates -evaluation of the tiered effect assessment procedure.
ink I Abstract 28-Day sediment-spiked laboratory toxicity tests with eight benthic macroinvertebrates and the lipophilic fungicide fludioxonil were conducted to verify the proposed tiered sediment effect assessment procedure as recommended by the European Food Safety Authority (EFSA). The test species were the oligochaetes Lumbriculus variegatus and Tubifex tubifex, the insects Chironomus riparius and Caenis horaria, the crustaceans Hyalella azteca and Asellus aquaticus and the bivalves Corbicula fluminalis and Pisidium amnicum. Toxicity estimates were expressed in terms of total concentration of dry sediment as w...
Source: Ecotoxicology and Environmental Safety - March 25, 2020 Category: Environmental Health Authors: Brock TCM, Romão J, Yin X, Osman R, Roessink I Tags: Ecotoxicol Environ Saf Source Type: research

Degradation of dibutyl phthalate (DBP) by a bacterial consortium and characterization of two novel esterases capable of hydrolyzing PAEs sequentially.
Abstract Phthalate esters (PAEs), a class of toxic anthropogenic compounds, have been predominantly used as additives or plasticizers, and great concern and interests have been raised regarding its environmental behavior and degradation mechanism. In the present study, a bacterial consortium consisting of Microbacterium sp. PAE-1 and Pandoraea sp. PAE-2 was isolated by the enrichment method, which could degrade dibutyl phthalate (DBP) completely by biochemical cooperation. DBP was converted to phthalic acid (PA) via monobutyl phthalate (MBP) by two sequential hydrolysis steps in strain PAE-1, and then PA was furth...
Source: Ecotoxicology and Environmental Safety - March 25, 2020 Category: Environmental Health Authors: Lu M, Jiang W, Gao Q, Zhang M, Hong Q Tags: Ecotoxicol Environ Saf Source Type: research

Interactions of superabsorbent polymers based on acrylamide substances with microorganisms occurring in human dwellings.
In this study, the SAPs potential for reducing/supporting unwanted indoor microorganism settlement was analyzed by biological methods under controlled laboratory conditions. Three commonly used SAPs (Cabloc CT, Creasorb SIS, Hydropam) were exposed to selected organisms representing green algae (Hematococcus pluvialis), cyanobacteria (Nostoc sp.), yeasts (Saccharomyces cerevisiae), wood-destroying fungi (Gleophyllium trabeum), and aerial molds. The obtained results indicated that Hydropam provided favorable conditions for Hematococcus pluvialis, Nostoc sp., and Saccharomyces cerevisiae. All three tested SAPs inhibited, both...
Source: Ecotoxicology and Environmental Safety - March 25, 2020 Category: Environmental Health Authors: Kobetičová K, Fořt J, Černý R Tags: Ecotoxicol Environ Saf Source Type: research

Metabolomics reveals the "Invisible" detoxification mechanisms of Amaranthus hypochondriacus at three ages upon exposure to different levels of cadmium.
Metabolomics reveals the "Invisible" detoxification mechanisms of Amaranthus hypochondriacus at three ages upon exposure to different levels of cadmium. Ecotoxicol Environ Saf. 2020 Mar 23;195:110520 Authors: Mengdi X, Haibo D, Jiaxin L, Zhe X, Yi C, Xuan L, Haiyan M, Hui S, Tianqi A, Yunzhen L, Wenqing C Abstract To decipher the Cd hyperaccumulation and tolerance mechanisms of plants and increase phytoremediation efficiency, in this study, the physiological effects induced by environmentally relevant concentrations (0, 25 and 200 mg/kg) of Cd were characterized in Amaranthus hypochondr...
Source: Ecotoxicology and Environmental Safety - March 23, 2020 Category: Environmental Health Authors: Mengdi X, Haibo D, Jiaxin L, Zhe X, Yi C, Xuan L, Haiyan M, Hui S, Tianqi A, Yunzhen L, Wenqing C Tags: Ecotoxicol Environ Saf Source Type: research

Fine particulate matter increases airway hyperresponsiveness through kallikrein-bradykinin pathway.
Abstract Epidemiological studies have reported short-term fine particulate matter (PM2.5) exposure to increase incidence of asthma, related to the increase of airway hyperresponsiveness (AHR); however, the underlying mechanism remains unclear. Aim of this study was to elucidate the role of kallikrein in PM2.5-induced airway hyperresponsiveness and understand the underlying mechanism. Nose-only PM2.5 exposure system was used to generate a mouse model of airway hyperresponsiveness. Compared with the control group, PM2.5 exposure could significantly increase airway resistance, lung inflammation, kallikrein expression...
Source: Ecotoxicology and Environmental Safety - March 23, 2020 Category: Environmental Health Authors: Cao X, Wang M, Li J, Luo Y, Li R, Yan X, Zhang H Tags: Ecotoxicol Environ Saf Source Type: research

Spatial distribution of phthalate esters and the associated response of enzyme activities and microbial community composition in typical plastic-shed vegetable soils in China.
In this study, 93 soil samples were collected in 31 plastic-sheds from one of China's largest vegetable production bases, Shouguang City, Shandong Province, to investigate the pollution characteristics and composition of PAEs in soils. Eleven PAEs were detected in the soil samples with the total concentration of 756-1590 μg kg-1 dry soil. Di (2-ethylhexyl) phthalate (DEHP), bis (2-n-butoxyethyl) phthalate (DBEP), di-isobutyl phthalate (DiBP) and di-n-butyl phthalate (DBP) were the main pollutants with the highest concentrations. Moreover, soil properties, including pH, total organic carbon (TOC), soil enzyme a...
Source: Ecotoxicology and Environmental Safety - March 23, 2020 Category: Environmental Health Authors: Zhou B, Zhao L, Wang Y, Sun Y, Li X, Xu H, Weng L, Pan Z, Yang S, Chang X, Li Y Tags: Ecotoxicol Environ Saf Source Type: research

Norethindrone alters mating behaviors, ovary histology, hormone production and transcriptional expression of steroidogenic genes in zebrafish (Danio rerio).
In this study, the effects of norethindrone (NET, a progestin) on the reproductive behavior, sex hormone production and transcriptional expressions were evaluated by exposing female zebrafish to NET at 0, 3.1, 36.2 and 398.6 ng L-1 for 60 days. Results showed that NET impaired the mating behaviors of female at 36.2 and 398.6 ng L-1 exhibited by males and increased the frequency of atretic follicular cells in the ovary exposed to NET at 398.6 ng L-1. As for sex hormones, plasma testosterone concentration in zebrafish increased, while estradiol concentration decreased. Up-regulation of genes (Np...
Source: Ecotoxicology and Environmental Safety - March 23, 2020 Category: Environmental Health Authors: Hou L, Chen S, Shi W, Chen H, Liang Y, Wang X, Tan J, Wang Y, Deng X, Zhan M, Long J, Cai G, Luo S, Zhang C, Liu J, Leung JYS, Xie L Tags: Ecotoxicol Environ Saf Source Type: research

Assessment of earthworm activity on Cu, Cd, Pb and Zn bioavailability in contaminated soils using biota to soil accumulation factor and DTPA extraction.
Abstract The study aims to investigate effect of earthworm activity on metal bioavailability in soils using their BSAF-metals. Based on a microcosmic laboratory experiment, epigeic species Amynthas corticis (A. corticis) and endogeic species Amynthas robustus (A. robustus) were cultured in two types of soils contaminated by Cd, Zn, Pb and Cu for 120 days. Earthworm characteristics (i.e. numbers, biomass and BSAF), soil properties (i.e. pH, organic C and N contents along with their components such as mineralization and microbial masses) and DTPA extracted metals in soil were determined. After the incubation, the bi...
Source: Ecotoxicology and Environmental Safety - March 23, 2020 Category: Environmental Health Authors: Xiao L, Li MH, Dai J, Motelica-Heino M, Chen XF, Wu JL, Zhao L, Liu K, Zhang C Tags: Ecotoxicol Environ Saf Source Type: research

Distribution, accumulation, and potential risks of heavy metals in soil and tea leaves from geologically different plantations.
This study aimed to estimate the impacts of geological difference on distribution of cadmium (Cd), lead (Pb), thallium (Tl), mercury (Hg), arsenic (As), antimony (Sb), chromium (Cr), nickel (Ni), and manganese (Mn) in soils and their accumulation in tea leaves, and further evaluate their health risks. 22 soils and corresponding young tea leaves (YTL) and old tea leaves (OTL), from geologically different plantations, were sampled and analyzed. Results showed that heavy metals concentrations in soils, derived from Permian limestone and Cambrian weakly mineralized dolomite, were obviously greater than those from Silurian clas...
Source: Ecotoxicology and Environmental Safety - March 21, 2020 Category: Environmental Health Authors: Zhang J, Yang R, Li YC, Peng Y, Wen X, Ni X Tags: Ecotoxicol Environ Saf Source Type: research

Toxicity of Ag+ on microstructure, biochemical activities and genic material of Trifolium pratense L. seedlings with special reference to phytoremediation.
The objective of this research was to evaluate Ag+ toxicity in Trifolium pratense L. seedlings subjected to increasing doses of Ag+ by determining photosynthetic pigment and malondialdehyde (MDA) contents, microstructure and hereditary substance alterations, changes in activities of antioxidase-superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) as well as the content of total Ag absorbed in vivo with evaluation of root growth. Doses of approximately 80 mg L-1 Ag+ severely affected photosynthetic efficiency in Trifolium pratense L. seedlings promoted by damages in photosynthetic apparatus evidenced by...
Source: Ecotoxicology and Environmental Safety - March 21, 2020 Category: Environmental Health Authors: Mo F, Li H, Li Y, Cui W, Wang M, Li Z, Chai R, Wang H Tags: Ecotoxicol Environ Saf Source Type: research

Evaluation of cadmium hyperaccumulation and tolerance potential of Myriophyllum aquaticum.
In this study, cadmium (Cd), the main representative factor of heavy-metal-polluted water, was the research object, and the Cd bioenrichment ability and tolerance of Myriophyllum aquaticum were studied for the first time. The experiment was conducted for 28 days by establishing experimental groups with different Cd concentrations (0, 10, 20, 40, 80, and 160 mg/L). The results show that M. aquaticum is a new Cd hyperaccumulator. There was no notable damage in the 40 mg/L Cd treatment group, and the Cd enrichment ability of M. aquaticum reached 17,970 ± 1020.01 mg/kg, while the bioconcentratio...
Source: Ecotoxicology and Environmental Safety - March 20, 2020 Category: Environmental Health Authors: Guo H, Jiang J, Gao J, Zhang J, Zeng L, Cai M, Zhang J Tags: Ecotoxicol Environ Saf Source Type: research

Associations of urinary polycyclic aromatic hydrocarbons with albuminuria in U.S. adults, NHANES 2003-2014.
Abstract BACKGROUND: Polycyclic aromatic hydrocarbons (PAHs) exposure has been shown to be a risk factor for many diseases. However, studies on the association between PAHs exposure and kidney disease are limited. The aim of this study was to explore the association between urinary PAHs and albuminuria based on a national representative sample from the general U.S. POPULATION: METHOD: The data utilized were extracted from the 2003-2014 National Health and Nutrition Examination Survey (NHANES). Eight urinary PAHs were detected as PAH metabolites (OH-PAHs). Multivariable logistic regression analyses were a...
Source: Ecotoxicology and Environmental Safety - March 20, 2020 Category: Environmental Health Authors: Li J, Fan H, Liu K, Li X, Fan D, Lu X, Xia Y, Cao Y, Xiao C Tags: Ecotoxicol Environ Saf Source Type: research

A rice glutaredoxin regulate the expression of aquaporin genes and modulate root responses to provide arsenic tolerance.
Abstract Rice is the most consumed food crop and essential determinant in global food security program. Currently, arsenic (As) accumulation in rice is a critical concern in terms of both crop productivity and grain quality; therefore, it is an urgent need to reduce As accumulation. Here, we selected a glutaredoxin (OsGrx_C7) gene that plays an essential role in AsIII tolerance in rice. To explore the mechanism, we raised OsGrx_C7 overexpression (OE) rice lines, which showed improved plant AsIII tolerance and lowered its accumulation in grains. Arsenic accumulation in husk, unpolished, and polished rice reduced by...
Source: Ecotoxicology and Environmental Safety - March 20, 2020 Category: Environmental Health Authors: Verma PK, Verma S, Tripathi RD, Chakrabarty D Tags: Ecotoxicol Environ Saf Source Type: research

Yeast strain Debaryomyces hansenii for amelioration of arsenic stress in rice.
Abstract Arsenic (As) is a serious threat for environment and human health. Rice, the main staple crop is more prone to As uptake. Bioremediation strategies with heavy metal tolerant rhizobacteria are well known. The main objective of the study was to characterize arsenic-resistant yeast strains, capable of mitigating arsenic stress in rice. Three yeast strains identified as Debaryomyces hansenii (NBRI-Sh2.11), Candida tropicalis (NBRI-B3.4) and Candida dubliniensis (NBRI-3.5) were found to have As reductase activity. D. hansenii with higher As tolerance has As expulsion ability as compared to other two strains. I...
Source: Ecotoxicology and Environmental Safety - March 20, 2020 Category: Environmental Health Authors: Kaur J, Anand V, Srivastava S, Bist V, Tripathi P, Naseem M, Nand S, Anshu, Khare P, Srivastava PK, Bisht S, Srivastava S Tags: Ecotoxicol Environ Saf Source Type: research

Molecular and culture-based surveys of metabolically active hydrocarbon-degrading archaeal communities in Sundarban mangrove sediments.
Abstract Archaea remain important players in global biogeochemical cycles worldwide, including in the highly productive mangrove estuarine ecosystems. In the present study, we have explored the diversity, distribution, and function of the metabolically active fraction of the resident archaeal community of the Sundarban mangrove ecosystem, using both culture-independent and culture-dependent approaches. To evaluate the diversity and distribution pattern of the active archaeal communities, RNA based analysis of the 16S rRNA gene was performed on an Illumina platform. The active Crenarchaeal community was observed to...
Source: Ecotoxicology and Environmental Safety - March 20, 2020 Category: Environmental Health Authors: Mukherji S, Ghosh A, Bhattacharyya C, Mallick I, Bhattacharyya A, Mitra S, Ghosh A Tags: Ecotoxicol Environ Saf Source Type: research

AM fungi increase uptake of Cd and BDE-209 and activities of dismutase and catalase in amaranth (Amaranthus hypochondriacus L.) in two contaminants spiked soil.
Abstract Soil co-contaminated with cadmium (Cd) and decabromodiphenyl ether (BDE-209) is a widespread environmental problem, especially in electronic waste contaminated surroundings. Accumulation of Cd and BDE-209 in crops has possibly harmful effects on local human health. In order to assess the potential of arbuscular mycorrhizal (AM) fungi and amaranth (Amaranthus hypochondriacus L.) in remediation of soil co-contaminated with Cd and BDE-209, pot trials were performed to investigate interactive effects of AM fungi, Cd and BDE-209 on growth of amaranth, uptake of Cd and BDE-209, distribution of chemical forms of...
Source: Ecotoxicology and Environmental Safety - March 20, 2020 Category: Environmental Health Authors: Li H, Huang WX, Gao MY, Li X, Xiang L, Mo CH, Li YW, Cai QY, Wong MH, Wu FY Tags: Ecotoxicol Environ Saf Source Type: research

Effects of Cd-resistant bacteria and calcium carbonate + sepiolite on Cd availability in contaminated paddy soil and on Cd accumulation in brown rice grains.
Abstract A pot experiment was conducted to evaluate the effects of combined application of cadmium (Cd)-resistant bacteria (J) and calcium carbonate + sepiolite (G) on both Cd bioavailability in contaminated paddy soil and on Cd accumulation in rice plants. Adding the mixture (J + G) to the soils significantly increased soil pH, decreased extractable Cd contents, and increased Fe/Mn-oxide Cd and organic-bound Cd contents. The applying of J + G, J and G decreased Cd contents in various rice tissues (roots, stems and leaves, husks, and brown rice grains) to different degrees. Compared w...
Source: Ecotoxicology and Environmental Safety - March 20, 2020 Category: Environmental Health Authors: Li Q, Zhang P, Zhou H, Peng PQ, Zhang K, Mei JX, Li J, Liao BH Tags: Ecotoxicol Environ Saf Source Type: research

Heavy metal-immobilizing bacteria increase the biomass and reduce the Cd and Pb uptake by pakchoi (Brassica chinensis L.) in heavy metal-contaminated soil.
Abstract Microbial immobilization is a novel and environmentally friendly technology that uses microbes to reduce metal availability in soil and accumulation of heavy metals in plants. We used urea agar plates to isolate urease-producing bacteria from the rhizosphere soil of pakchoi in Cd- and Pb-contaminated farmland and investigated their effects on Cd and Pb accumulation in pakchoi and the underlying mechanisms. The results showed that two urease-producing bacteria, Bacillus megaterium N3 and Serratia liquefaciens H12, were identified by screening. They had higher ability to produce urease (57.5 ms cm...
Source: Ecotoxicology and Environmental Safety - March 19, 2020 Category: Environmental Health Authors: Han H, Cai H, Wang X, Hu X, Chen Z, Yao L Tags: Ecotoxicol Environ Saf Source Type: research

Effect of water accommodated fractions of fuel oil on fixed carbon and nitrogen by microalgae: Implication by stable isotope analysis.
Abstract Effect of water accommodated fractions (WAF) of #180 fuel oil on fixed carbon and nitrogen in microalgae was studied by stable isotopes. Platymonas helgolandica, Heterosigma akashiwo and Nitzschia closterium were exposed to five WAF concentrations for 96 h. The δ13C value of microalgae was significantly lower than that of the control group, indicated that carbon was limited in the WAF concentrations. The δ13C value of microalgae appeared peak valley at 48 h in control group, corresponding to the enhanced capacity in carbon fixation during microalgae photosynthesis. The physiological ...
Source: Ecotoxicology and Environmental Safety - March 19, 2020 Category: Environmental Health Authors: Liu Y, Li N, Lou Y, Liu Y, Zhao X, Wang G Tags: Ecotoxicol Environ Saf Source Type: research

Sources apportionment and carcinogenic risk of polycyclic aromatic hydrocarbons in gas phase of urban Shanghai: Based on high volume solid phase extraction (Hi-volume SPE).
This study analyzed compositional characteristics, sources, and carcinogenic risks of PAHs in the atmospheric gas phase at an urban site in Shanghai, East China. Seventy-four gas phase samples were collected during the warm months of May-October 2018 using a high-volume solid phase extraction (Hi-volume SPE) technique. The total concentration of sixteen priority PAHs (ΣPAHs) was in the range of 5.54-182.05 ng m-3 (average 34.47 ng m-3) and the total of seven carcinogenic PAHs (ΣCPAHs) was in range of 0.03-1.49 ng m-3 (average 0.48 ng m-3), accounting for 1.47% of ΣP...
Source: Ecotoxicology and Environmental Safety - March 19, 2020 Category: Environmental Health Authors: Zhang S, Cai M, Meng X, Gao Y Tags: Ecotoxicol Environ Saf Source Type: research

Effect of biochar and redmud amendment combinations on Salix triandra growth, metal(loid) accumulation and oxidative stress response.
In conclusion, this treatment seemed a good solution in a phytomanagement strategy using Salix triandra, improving soil conditions and plant growth and reducing oxidative stress level in the plant roots. PMID: 32200145 [PubMed - as supplied by publisher] (Source: Ecotoxicology and Environmental Safety)
Source: Ecotoxicology and Environmental Safety - March 19, 2020 Category: Environmental Health Authors: Lebrun M, Miard F, Scippa GS, Hano C, Morabito D, Bourgerie S Tags: Ecotoxicol Environ Saf Source Type: research

Evaluation of Hg methylation in the water-level-fluctuation zone of the Three Gorges Reservoir region by using the MeHg/HgT ratio.
Abstract In the recent decade, the hydroelectric reservoir is identified as a methylmercury (MeHg) hotspot and gained much attention. The artificial water level management in the Three Gorges Reservoir (TGR) in China formed a water-level-fluctuation zone (WLFZ) undergoing flooding drying rotations annually. However, the mercury (Hg) methylation and major geochemical driving factors at different elevations in the WLFZ remain unclear. Here we use total Hg (HgT) normalized MeHg (MeHg/HgT ratio) to evaluate Hg methylation degree in a one-year field study at 155, 165 m elevations in the WLFZ and with>175 m...
Source: Ecotoxicology and Environmental Safety - March 19, 2020 Category: Environmental Health Authors: Liu J, Wang D, Zhang J, Liem-Nguyen V, Huang R, Jiang T Tags: Ecotoxicol Environ Saf Source Type: research

Transcriptome survey and toxin measurements reveal evolutionary modification and loss of saxitoxin biosynthesis genes in the dinoflagellates Amphidinium carterae and Prorocentrum micans.
Abstract In the present study, we characterized the potential toxin genes for polyketide synthase (PKS) and saxitoxin (STX) biosynthesis using the transcriptomes of two non-STX producing dinoflagellates Amphidinium carterae and Prorocentrum micans. RNA sequencing revealed 94 and 166 PKS contigs in A. carterae and P. micans, respectively. We first detected type III PKS, which was closely related to bacteria. In addition, dozens of homologs of 20 STX biosynthesis genes were identified. Interestingly, the core STX-synthesizing genes sxtA and sxtB were only found in P. micans, whereas sxtD was detected in A. carterae ...
Source: Ecotoxicology and Environmental Safety - March 19, 2020 Category: Environmental Health Authors: Wang H, Kim H, Ki JS Tags: Ecotoxicol Environ Saf Source Type: research

Banded tetra (Astyanax aeneus) as bioindicator of trace metals in aquatic ecosystems of the Yucatan Peninsula, Mexico: Experimental biomarkers validation and wild populations biomonitoring.
Abstract Bioindicator organisms are important tools in environmental monitoring studies. Understanding this, the overall goal of the present study was to evaluate the sensitivity and viability of the native fish species Banded tetra, (Astyanax aeneus; Günther, 1860), widely spread in the aquatic ecosystems of the Yucatan Peninsula in Mexico, as a bioindicator organism. In order to do this, we performed a bioassay at sublethal concentrations using copper (CuSO4) to experimentally evaluate and validate the relationship between the trace metals and oxidative stress biomarkers response [(catalase (CAT), lipoperox...
Source: Ecotoxicology and Environmental Safety - March 19, 2020 Category: Environmental Health Authors: Hinojosa-Garro D, Osten JR, Dzul-Caamal R Tags: Ecotoxicol Environ Saf Source Type: research

Impact of digestate and its fractions on mineralization of 14C-phenanthrene in aged soil.
Abstract The impact of whole digestate (WD) and its fractions (solid [SD] and liquid [LD]) on 14C-phenanthrene mineralization in soil over 90 d contact time was investigated. The 14C-phenanthrene spiked soil was aged for 1, 30, 60 and 90 d. Analysis of water-soluble nitrogen, phosphorus, total (organic and inorganic) carbon, and quantitative bacterial count were conducted at each time point to assess their impact on mineralization of 14C-phenanthrene in soils. Indigenous catabolic activity (total extents, maximum rates and lag phases) of 14C-phenanthrene mineralization were measured using respirometric s...
Source: Ecotoxicology and Environmental Safety - March 19, 2020 Category: Environmental Health Authors: Ibeto C, Omoni V, Fagbohungbe M, Semple K Tags: Ecotoxicol Environ Saf Source Type: research

The combined toxicity influence of microplastics and nonylphenol on microalgae Chlorella pyrenoidosa.
This study confirms that microplastics significantly affected the toxicity of organic pollutants on microalgae. Further research on the combined toxicity of smaller size microplastics with pollutants in chronic toxicity is needed. PMID: 32200150 [PubMed - as supplied by publisher] (Source: Ecotoxicology and Environmental Safety)
Source: Ecotoxicology and Environmental Safety - March 19, 2020 Category: Environmental Health Authors: Yang W, Gao X, Wu Y, Wan L, Tan L, Yuan S, Ding H, Zhang W Tags: Ecotoxicol Environ Saf Source Type: research

Comparative assessment of heavy metal accumulation and bio-indication in coastal dune halophytes.
This study aimed at assessing heavy metals (Fe, Mn, Zn, Cu, Cr and Pb) in four perennial halophytes (viz. Heliotropium bacciferum, Halopyrum mucronatum, Ipomoea pes-caprae and Salsola imbricata) growing at two sites on the Karachi coast. Site - II, closer to the Industrial area had higher bioavailability as well as translocation factor (TF) for most of the heavy metals and Na+ where soil sediments had lower pH (approximately 7.5), higher salinity (EC) and organic matter (OM). Site - I which was far from Industrial area had comparatively higher bio-concentration factor (BCF) and lower TF for metal ions and soil pH of 8.1-9....
Source: Ecotoxicology and Environmental Safety - March 19, 2020 Category: Environmental Health Authors: Mujeeb A, Aziz I, Ahmed MZ, Alvi SK, Shafiq S Tags: Ecotoxicol Environ Saf Source Type: research

Polychlorinated biphenyls and organochlorines pesticides in indoor dust: An exploration of sources and health exposure risk in a rural area (Kopawa) of Nepal.
This study insight the contamination level, distribution pattern, and sources of OCs in indoor dust from a rural area of Nepal. Additionally, daily exposure risk through different intake pathways was estimated in order to mark the potential risk of OCs to local residents. Results indicated the predominance of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in dust. Ʃ26OCPs (median 87 ng/g) in dust was about 7-8 times greater than Ʃ30PCBs (median 10.5 ng/g). DDT was the most abundant chemical among Ʃ26OCPs, followed by HCHs and endosulfan, and accounted for 73%, 7%, and 4% of Ʃ26OCPs, res...
Source: Ecotoxicology and Environmental Safety - March 19, 2020 Category: Environmental Health Authors: Chandra Yadav I, Devi NL, Li J, Zhang G Tags: Ecotoxicol Environ Saf Source Type: research

Toxic assessment, growth disrupting and neurotoxic effects of red seaweeds' botanicals against the dengue vector mosquito Aedes aegypti L.
Abstract Application of synthetic pesticides over decades to control insects, pests, and disease vectors has resulted in negative impacts on environment and health. The current study assessed the toxicological effects of 12 botanicals obtained from 4 different red seaweeds against the dengue vector mosquito Aedes aegypti L. (Diptera: Culicidae). Four species of red seaweeds, namely Laurencia karachiana, Gracilaria foliifera, Jania rubens, Asparagopsis taxiformis, were collected from Karachi coast and extracted with hexane, dichloromethane and methanol. The efficiency of these extracts was determined by using a dos...
Source: Ecotoxicology and Environmental Safety - March 18, 2020 Category: Environmental Health Authors: Bibi R, Tariq RM, Rasheed M Tags: Ecotoxicol Environ Saf Source Type: research

circ_0000638 inhibits neodymium oxide-induced bronchial epithelial cell inflammation through the miR-498-5p/NF- κB axis.
In this study, we explored the role and mechanisms of circular RNA in neodymium oxide-induced airway inflammation. Our study showed that treating human bronchial epithelial (16HBE) cells with neodymium oxide caused an inflammatory response by upregulating the expression of interleukin-8 (IL-8) and interleukin-1 beta (IL-1β). Quantitative real-time polymerase chain reaction (qRT-PCR) analyses revealed significant downregulation of circRNA_0000638 in neodymium oxide-treated 16HBE cells. Data from functional analyses further showed that circ_0000638 inhibited inflammation induced by neodymium oxide in 16HBE cells. circ_0...
Source: Ecotoxicology and Environmental Safety - March 18, 2020 Category: Environmental Health Authors: Xue H, Yu F, Zhang X, Liu L, Huang L Tags: Ecotoxicol Environ Saf Source Type: research

Impaired pesticide removal and detoxification by biomixtures during the simulated pesticide application cycle of a tropical agricultural system.
This study aimed to evaluate the removal and detoxifying capacity of a previously formulated biomixture (coconut fiber, 50% v/v; compost, 25%; and soil pre-exposed to pesticides, 25%) during a simulated cycle of pesticide application (93 days) for potato production. The scheme included a first application of linuron followed by a weekly alternated treatment of the mixtures chlorpyrifos/metalaxyl and malathion/dimethomorph, and antibiotics at day 72. The biomixture showed efficient removal of linuron (half-life
Source: Ecotoxicology and Environmental Safety - March 18, 2020 Category: Environmental Health Authors: Acosta-Sánchez A, Soto-Garita C, Masís-Mora M, Cambronero-Heinrichs JC, Rodríguez-Rodríguez CE Tags: Ecotoxicol Environ Saf Source Type: research

Influence of aquatic colloids on the bioaccumulation and biological effects of diclofenac in zebrafish (Danio rerio).
In this study, diclofenac (DCF) was selected as a typical drug to study the effects of natural colloids on the bioaccumulation and biotoxicity in juvenile zebrafish (Danio rerio) exposed to an environmentally relevant concentration (1 μg/L) and a high concentration (100 μg/L) of DCF. The results showed that the presence of colloids accelerated and enhanced the accumulation of DCF in zebrafish muscle and viscera, and the effects are greater at the environmentally relevant concentration of DCF. However, the colloids enhanced the burden in the head in the environmentally relevant concentration group, but reduc...
Source: Ecotoxicology and Environmental Safety - March 18, 2020 Category: Environmental Health Authors: Sun Y, Liu J, Lu G Tags: Ecotoxicol Environ Saf Source Type: research

Effect of soil mercury pollution on ginger (Zingiber officinale Roscoe): Growth, product quality, health risks and silicon mitigation.
Abstract The mercury residue in soil not only poisons plants, but also bioaccumulates and biomagnifies through the food chain, causing a significant risk to human health. As an essential condiment on the table, the food safety of ginger should be focused on. Using soil culture experiments, this study aimed to identify the response of ginger growth to mercury pollution, assess the transmission and residue of mercury in different product organs and explore the mitigation mechanism of silicon on mercury toxicity. Effects of soil mercury pollution on ginger growth showed hormesis and time effect. Long-term mercury pol...
Source: Ecotoxicology and Environmental Safety - March 18, 2020 Category: Environmental Health Authors: Xu J, Zhang J, Lv Y, Xu K, Lu S, Liu X, Yang Y Tags: Ecotoxicol Environ Saf Source Type: research

Fermented black barley ameliorates lung injury induced by cooking oil fumes via antioxidant activity and regulation of the intestinal microbiome in mice.
Abstract To investigate the effect of fermented black barley on cooking oil fume (COF)-induced lung injury, male ICR mice were randomized into five groups: normal control (NC), fermented black barley treatment (NF), COF exposure (O), COF + fermented black barley treatment (OF) and COF + Lactobacillus treatment (OL). The exposure of mice to COF was performed for 5 min per day and 4 days per week for a total of 9 weeks, and the mice in the OF, NF and OL groups were administered fermented black barley or Lactobacillus continuously for 9 weeks (1 mL/100 g). Our results showed that the gam...
Source: Ecotoxicology and Environmental Safety - March 18, 2020 Category: Environmental Health Authors: Ding X, Yang L, Guan Q, Zeng H, Song C, Wu J, Song L Tags: Ecotoxicol Environ Saf Source Type: research