Abstract:
:The present study investigates the germination and growth of Triticum aestivum exposed to two different microcystins (microcystin-LR [where the two variable places in the toxin molecule are leucine (L) and arginine (R) (MC-LR)] and microcystin-RR) and to cell-free cyanobacterial crude extract containing MC-LR. The concentration of the microcystins was set to 0.5 microg L(-1) and therefore is in the range of concentrations normally detected in the environment. In three experiments, the inhibition of germination, the inhibition of root and shoot development, photosynthesis, and activity of oxidative stress-response enzymes, such as glutathione-S-transferase, glutathione peroxidase, and glutathione reductase, were measured. All plants were placed in pots containing normal garden soil to investigate the effects of soil in the uptake of toxin by Triticum aestivum. The results showed clear effects on the morphology of roots and shoots, which were inhibited in exposures with cyanotoxins and crude extract. The inhibition of photosynthesis and the elevation of antioxidative-response enzymes indicate the generation of reactive oxygen species due to the exposure to the toxins resulting in oxidative stress for the plants.
journal_name
Environ Toxicol Chemjournal_title
Environmental toxicology and chemistryauthors
Pflugmacher S,Hofmann J,Hübner Bdoi
10.1897/07-145.1subject
Has Abstractpub_date
2007-12-01 00:00:00pages
2710-6issue
12eissn
0730-7268issn
1552-8618pii
07-145journal_volume
26pub_type
杂志文章abstract::Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) has been widely used as an explosive in munition formulations, resulting in contamination of wildlife habitat on military installations. To estimate health effects for reptilian species, acute, subacute, and subchronic oral toxicity studies were conducted using the Western...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1897/08-419.1
更新日期:2009-05-01 00:00:00
abstract::Military activities associated with training have resulted in soil residues of munition compounds and their breakdown products. Often, these areas are valuable habitats used by birds. To evaluate the possibility of adverse effects in birds, the effects from oral exposures of 2,6-dinitrotoluene (2,6-DNT) and 1,3,5-trin...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1897/06-525.1
更新日期:2007-07-01 00:00:00
abstract::Polybrominated diphenyl ethers (PBDEs) are flame retardants used in a variety of consumer products. The solid vapor pressures of BDE 15 and BDE 209 were determined by using the Knudsen effusion method, and the values measured extrapolated to 298.15 K are 3.12 × 10(-3) and 9.02 × 10(-13) Pa, respectively. The enthalpie...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.621
更新日期:2011-10-01 00:00:00
abstract::Per- and polyfluoroalkyl substances (PFAS) often occur together as contamination in exposure media such as drinking water or food. The relative potency factor (RPF) methodology facilitates the risk assessment of mixture exposure. A database of liver endpoints was established for 16 PFAS, using data with the same speci...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.4835
更新日期:2020-07-30 00:00:00
abstract::Riverine runoff samples were collected monthly from March 2005 to February 2006 from the eight major outlets of the Pearl River Delta (PRD), South China, and analyzed to obtain the concentrations of n-alkanes in both the filtrate and particulate phases. The average concentrations of Sigma(C15-C34) (i.e., sum of C15 to...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1897/08-034.1
更新日期:2008-10-01 00:00:00
abstract::The desorption behavior of benzidine from Lake Macatawa (Holland, MI, USA) sediment was investigated in this study using batch solvent extraction method. Seven solvents were tested as the extracting reagents: Deionized water (DI), calcium chloride in DI (CaCl2), sodium hydroxide in DI (NaOH), acetonitrile (ACN), a mix...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1897/05-017r.1
更新日期:2005-12-01 00:00:00
abstract::Locomotor performance is an important fitness-related trait in reptiles because of its potential influence on prey capture and predator avoidance. Because cholinesterase-inhibiting pesticides disrupt neuromuscular signaling, reduction in performance seems to be a logical translation of this biochemical disruption to t...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1897/05-028r.1
更新日期:2006-05-01 00:00:00
abstract::Six-month-old lesser scaup (Aythya affinis) and nestling tree swallows (Tachycineta bicolor) were injected intraperitoneally with beta-naphthoflavone (BNF) in corn oil or in vehicle alone. Liver samples were taken and stored at -80 degrees C until microsome preparation and monooxygenase assay. Skin samples were placed...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1897/2605021.1
更新日期:2006-10-01 00:00:00
abstract::As part of the University of Michigan Dioxin Exposure Study, soil samples were collected from 766 residential properties near the Tittabawassee River between Midland and Saginaw; near the Dow Chemical Facility in Midland; and, for comparison, in the other areas of Midland and Saginaw Counties and in Jackson and Calhou...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.24
更新日期:2010-01-01 00:00:00
abstract::The effects of antidepressants on wildlife are currently raising some concern because of an increased number of publications indicating biological effects at environmentally relevant concentrations (<100 ng/L). These results have been met with some scepticism because of the higher concentrations required to detect eff...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章,评审
doi:10.1002/etc.3087
更新日期:2016-04-01 00:00:00
abstract::Co-occurrence of pyrethroids and metals in watersheds previously has been reported to pose great risk to aquatic species. Pyrethroids are a class of chiral insecticides that have been shown to have enantioselective toxicity and biotransformation. However, the influence of metals on enantioselectivity of pyrethroids ha...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.3747
更新日期:2017-08-01 00:00:00
abstract::Some toxicology research in which toxicant exposures are continual (pulsed) rather than continuous have been reported. A number of toxicity models have been developed for pulsed and continuous exposures. Most of these models were developed based on one- or two-compartment, first-order toxicokinetics and were calibrate...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1897/06-081r.1
更新日期:2007-01-01 00:00:00
abstract::Paralytic shellfish toxins are secondary metabolites produced by several species of dinoflagellates and cyanobacteria. Known targets of these toxins, which typically occur at detrimental concentrations during harmful algal blooms, include voltage-gated ion channels in humans and other mammals. However, the effects of ...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.2187
更新日期:2013-06-01 00:00:00
abstract::To further characterize avian toxicity to environmental levels of select per- and poly-fluoroalkyl substances (PFAS), we established species- and tissue-specific PFAS chronic toxicity values (CTVs) associated with a lowest-observable-adverse effect level (LOAEL) threshold previously established for northern bobwhite q...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.4937
更新日期:2020-11-19 00:00:00
abstract::The aerial spray prediction model AgDRIFT embodies the computational engine found in the near-wake Lagrangian model AGricultural DISPersal (AGDISP) but with several important features added that improve the speed and accuracy of its predictions. This article summarizes those changes, describes the overall analytical a...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1897/1551-5028(2002)021<0659:aamfen>2.0.co;2
更新日期:2002-03-01 00:00:00
abstract::The present study investigated the biomagnification potential as well as the substance and tissue-specific distribution of perfluoroalkyl substances (PFASs) in market-size rainbow trout (Oncorhynchus mykiss). Rainbow trout with an average body weight of 314 ± 21 g were exposed to perfluorobutane sulfonate (PFBS), perf...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.2279
更新日期:2013-09-01 00:00:00
abstract::Reduced glutathione (GSH) plays a number of key roles in many biochemical pathways. This peptide is highly reactive and forms conjugates with other molecules via its sulfhydryl moiety. The interactions of the common heavy metal pollutant Cd(II) with GSH were determined by using the Brdicka reaction to evaluate whether...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.78
更新日期:2010-03-01 00:00:00
abstract::With increasing application and commercial production, carbon nanotubes (CNTs) will inevitably be released into aquatic environments and affect the transport and toxicity of toxic metals in ecosystems. The present study examined how CNTs affected the biokinetics and toxicity of a toxic metal, cadmium (Cd), in the fres...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.3122
更新日期:2015-12-01 00:00:00
abstract::Breeding pairs of mallards (Anas platyrhynchos) were fed a control diet or a diet containing 0.5 microg/g mercury (Hg) in the form of methylmercury chloride. There were no effects of Hg on adult weights and no overt signs of Hg poisoning in adults. The Hg-containing diet had no effect on fertility of eggs, but hatchin...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.64
更新日期:2010-03-01 00:00:00
abstract::We evaluated the utility of gene-transcriptional responses in the liver of mosquitofish (Gambusia affinis), a species introduced to many countries and therefore widely available, for detecting endocrine-disrupting activity in water. Exposure to β-naphthoflavone, an aryl hydrocarbon receptor (AhR) agonist, significantl...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.669
更新日期:2011-12-01 00:00:00
abstract::To examine the behavior of the estrogenic biomarker vitellogenin (VTG) under the combined impact of estrogens and pathogens, parasite-infected or noninfected rainbow trout were exposed to two doses of 17β-estradiol (E2). Infected and E2-exposed fish showed significantly lower hepatic VTG mRNA levels than healthy fish....
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.1966
更新日期:2012-10-01 00:00:00
abstract::Vitellogenin (VTG) induction has proved to be a valuable biomarker for assessing exposure to environmental estrogens in fish. The widespread use of VTG in this regard has lead to the need for standardized assays to quantify VTG, and monoclonal antibodies have the potential to help accomplish this. A VTG enzyme-linked ...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:
更新日期:2002-01-01 00:00:00
abstract::Mercury (Hg) contamination of aquatic ecosystems is a global environmental problem. Data are abundant on Hg contamination and factors that affect its bioaccumulation in lake communities, but comparatively little information on riverine ecosystems exists. The present study examines fish Hg concentrations of the Lower R...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.224
更新日期:2010-08-01 00:00:00
abstract::Acute 96-h ammonia toxicity to three-month-old juvenile mussels (Lampsilis siliquoidea) was evaluated in four treatments (water-only, water-only with feeding, water and soil, and water and sand) using an exposure unit designed to maintain consistent pH and ammonia concentrations in overlying water and in pore water su...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.259
更新日期:2010-09-01 00:00:00
abstract::Northern elephant seal (Mirounga angustirostris) pups undergo a substantial intertissue reorganization of protein, minerals, and other cellular components during their postweaning development, which might entail the mobilization of associated contaminants. The authors investigated the changes in concentrations of 11 e...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.1960
更新日期:2012-10-01 00:00:00
abstract::The Cache Slough complex is an area of tidal sloughs in the Sacramento-San Joaquin River Delta of California (USA), and is surrounding by irrigated agricultural lands. Among the species of concern in the area is the delta smelt (Hypomesus transpacificus), a federally listed threatened species. Releases of the organoph...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.2512
更新日期:2014-04-01 00:00:00
abstract::Recently it was discovered that the perfluorooctane sulfonate (PFOS) detected in wildlife, such as fish-eating birds, had a greater proportion of linear PFOS (L-PFOS) than the manufactured technical product (T-PFOS), which contains linear and branched isomers. This suggests toxicological studies based on T-PFOS data m...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.700
更新日期:2011-12-01 00:00:00
abstract::The Strait of Georgia (British Columbia, Canada) is a hydrologically complex inland sea with a rich abundance and diversity of species of aquatic life. Marine sediments, as both a sink for hydrophobic contaminants and a potential source for aquatic food webs, were collected from 41 sites throughout the 6,900-km(2) Str...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.542
更新日期:2011-07-01 00:00:00
abstract::Standard ecotoxicity tests are conducted under constant and favorable experimental conditions. In natural communities, however, the toxicity of chemicals may be influenced by abiotic and biotic environmental factors. Firstly, the authors examined the influence of temperature and total food concentration on the nature ...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.3235
更新日期:2016-03-01 00:00:00
abstract::The ivory gull Pagophila eburnea is a high-Arctic species threatened by climate change and contaminants. The objective of the present study was to assess spatial variation of contaminant levels (organochlorines [OCs], brominated flame retardants [BFRs], perfluorinated alkyl substances [PFASs], and mercury [Hg]) in ivo...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.2935
更新日期:2015-07-01 00:00:00