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https://www.readbyqxmd.com/read/29151145/pendimethalin-induces-oxidative-stress-dna-damage-and-mitochondrial-dysfunction-to-trigger-apoptosis-in-human-lymphocytes-and-rat-bone-marrow-cells
#1
Sabiha M Ansari, Quaiser Saquib, Sabry M Attia, Eslam M Abdel-Salam, Hend A Alwathnani, Mohammad Faisal, Abdulrahman A Alatar, Abdulaziz A Al-Khedhairy, Javed Musarrat
Pendimethalin (PM) is a dinitroaniline herbicide extensively applied against the annual grasses and broad-leaved weeds. There is no report available on PM-induced low-dose genotoxicity in human primary cells and in vivo test models. Such data gap has prompted us to evaluate the genotoxic potential of PM in human lymphocytes and rats. PM selectively binds in the minor groove of DNA by forming covalent bonds with G and C nitrogenous bases, as well as with the ribose sugar. PM induces micronucleus formation (MN) in human lymphocytes, indicating its clastogenic potential...
November 18, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29151143/salinity-reduces-2-4-d-efficacy-in-echinochloa-crusgalli-by-affecting-redox-balance-nutrient-acquisition-and-hormonal-regulation
#2
Faisal Islam, Yuan Xie, Muhammad A Farooq, Jian Wang, Chong Yang, Rafaqat A Gill, Jinwen Zhu, Weijun Zhou
Distinct salinity levels have been reported to enhance plants tolerance to different types of stresses. The aim of this research is to assess the interaction of saline stress and the use of 2,4-D as a means of controlling the growth of Echinochloa crusgalli. The resultant effect of such interaction is vital for a sustainable approach of weed management and food production. The results showed that 2,4-D alone treatment reduces the chlorophyll contents, photosynthetic capacity, enhanced MDA, electrolyte leakage, and ROS production (H2O2, O2(·-)) and inhibited the activities of ROS scavenging enzymes...
November 18, 2017: Protoplasma
https://www.readbyqxmd.com/read/29149711/enantiomeric-characterization-of-herbicide-lactofen-enantioseparation-absolute-configuration-assignment-and-enantioselective-activity-and-toxicity
#3
Jingqian Xie, Lu Zhao, Kai Liu, Fangjie Guo, Zunwei Chen, Weiping Liu
Chiral herbicides consist of two or more enantiomers, which usually differ in their biological properties and behave enantioselectively in biochemical process. Scant studies have been published in the past decades to characterize the enantiomers of herbicide lactofen. In this study, a laboratory method was developed to prepare the lactofen enantiomers using normal phase high performance liquid chromatography with an AD-H column, and μg level production yield was achieved in a single run. The two separated enantiomers had purity of ≫99%, with their absolute configurations assigned by experimental and calculated electronic and vibrational circular dichroism...
October 31, 2017: Chemosphere
https://www.readbyqxmd.com/read/29149646/dependence-of-growth-inhibiting-action-of-increased-planting-density-on-capacity-of-lettuce-plants-to-synthesize-aba
#4
Lidiya B Vysotskaya, Tatyana N Arkhipova, Guzel R Kudoyarova, Stanislav Yu Veselov
Inhibition of lettuce plant growth under increased planting density was accompanied by accumulation of abscisic acid (ABA) in the shoots of competing plants. To check causal relationship between these responses we studied the effect of decreased synthesis of ABA on growth indexes and hormonal balance of lettuce plants under elevated density of their planting (one (single) or three (competing) plants per pot). Herbicide fluridone was used to inhibit ABA synthesis. Preliminary experiments with single plants showed that presence of fluridone in the soil solution at rather low concentration (0...
November 11, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29149640/change-to-ecosystem-properties-through-changing-the-dominant-species-impact-of-pteridium-aquilinum-control-and-heathland-restoration-treatments-on-selected-soil-properties
#5
G Milligan, K E Booth, E S Cox, R J Pakeman, M G Le Duc, L Connor, S Blackbird, R H Marrs
It is well known that soils are influenced by the plant species that grow in them. Here we consider the effects of management-induced changes to plant communities and their soils during restoration within a 20-year manipulative experiment where the aim was to change a late-successional community dominated by the weed, Pteridium aquilinum, to an earlier-successional grass-heath one. The ecological restoration treatments altered the above- and below-ground components of the community substantially. Untreated plots maintained a dense Pteridium cover with little understory vegetation, cutting treatments produce significant reductions of Pteridium, whereas herbicide (asulam) produced significant immediate reductions in Pteridium but regressed towards the untreated plots within 10 years...
November 14, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29148615/farmers-perspective-on-herbicide-resistant-weeds-and-application-of-resistance-management-strategies-results-from-a-german-survey
#6
Lena Ulber, Dagmar Rissel
BACKGROUND: A herbicide resistance survey was conducted in Germany to determine farmers' awareness of herbicide resistance and experience with resistant weeds, the used information sources on herbicide resistance and methods employed to confirm resistance. In addition, the application pattern and perception of resistance management strategies by farmers were assessed. RESULTS: The majority of farmers (88%) was aware of the presence of herbicide resistance cases in Germany and 64% and 50% of farmers reported that resistant weeds were detected in their county or on their farm, respectively...
November 17, 2017: Pest Management Science
https://www.readbyqxmd.com/read/29148165/dinitroaniline-herbicide-resistance-in-a-multiple-resistant-lolium-rigidum-population
#7
Jinyi Chen, Qin Yu, Mechelle Owen, Heping Han, Stephen Powles
BACKGROUND: The pre-emergence dinitroaniline herbicides (such as trifluralin and pendimethalin) are vital to Australian no-till farming systems. A Lolium rigidum population collected from the Western Australian grain belt with a 12-year trifluralin use history was characterised for resistance to dinitroaniline, acetyl CoA carboxylase (ACCase)- and acetolactate synthase (ALS)-inhibiting herbicides. Target-site resistance mechanisms were investigated. RESULTS: This L...
November 16, 2017: Pest Management Science
https://www.readbyqxmd.com/read/29146988/variations-in-nutrient-and-trace-element-composition-of-rice-in-an-organic-rice-frog-coculture-system
#8
Zhimin Sha, Qingnan Chu, Zheng Zhao, Yubo Yue, Linfang Lu, Jing Yuan, Linkui Cao
Introducing frogs into paddy fields can control pests and diseases, and organic farming can improve soil fertility and rice growth. The aim of this 2-year field study was compare the yield and elemental composition of rice between an organic farming system including frogs (ORF) and a conventional rice culture system (CR). The grain yields were almost the same in the ORF system and the CR system. The ORF significantly increased the contents of phosphorus (P), ion (Fe), zinc (Zn), molybdenum (Mo) and selenium (Se) in rice grain at one or both years...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29140727/population-genomics-of-herbicide-resistance-adaptation-via-evolutionary-rescue
#9
Julia M Kreiner, John R Stinchcombe, Stephen I Wright
The evolution of herbicide resistance in weed populations is a highly replicated example of adaptation surmounting the race against extinction, but the factors determining its rate and nature remain poorly understood. Here, we explore theory and empirical evidence for the importance of population genetic parameters-including effective population size, dominance, mutational target size, and gene flow-in influencing the probability and mode of herbicide resistance adaptation and its variation across species. We compiled data on the number of resistance mutations across populations for 79 herbicide-resistant species...
November 15, 2017: Annual Review of Plant Biology
https://www.readbyqxmd.com/read/29139349/leucobacter-triazinivorans-sp-nov-a-s-triazine-herbicide-prometryn-degrading-bacterium-isolated-from-sludge
#10
Le-Ni Sun, Dan-Dan Pan, Xiang-Wei Wu, En-Dong Yang, Ri-Mao Hua, Qing X Li
A Gram-stain-positive, rod-shaped, non-motile bacterial strain, designated JW-1(T), was isolated from activated sludge collected from the outlet of an aeration tank in a prometryn-manufacturing plant, located in Binzhou City, Shandong province, PR China. Phylogenetic analysis, based on 16S rRNA gene sequences, indicated that strain JW-1(T) belongs to the genus Leucobacter and its closest neighbours are 'Leucobacter kyeonggiensis' F3-P9 (98.95 % similarity), Leucobacter celer subsp. astrifaciens CBX151(T) (98...
November 15, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29139345/herbicide-ingredients-change-salmonella-enterica-sv-typhimurium-and-escherichia-coli-antibiotic-responses
#11
Brigitta Kurenbach, Paddy S Gibson, Amy M Hill, Adam S Bitzer, Mark W Silby, William Godsoe, Jack A Heinemann
Herbicides are frequently released into both rural and urban environments. Commercial herbicide formulations induce adaptive changes in the way bacteria respond to antibiotics. Salmonella enterica sv. Typhimurium and Escherichia coli were exposed to common co-formulants of formulations, and S. enterica sv. Typhimurium was exposed to active ingredients dicamba, 2,4-D and glyphosate to determine what ingredients of the commercial formulations caused this effect. Co-formulants Tween80 and carboxymethyl cellulose induced changes in response, but the pattern of the responses differed from the active ingredients, and effect sizes were smaller...
November 17, 2017: Microbiology
https://www.readbyqxmd.com/read/29139072/elimination-and-detoxification-of-2-4-d-by-umbelopsis-isabellina-with-the-involvement-of-cytochrome-p450
#12
Justyna Nykiel-Szymańska, Paulina Stolarek, Przemysław Bernat
The chemical 2,4-dichlorophenoxyacetic acid (2,4-D) is used in agriculture as a herbicide. Its intensive use has an adverse effect on the environment. This study involved examining the degradation of 2,4-D compound by the filamentous fungus Umbelopsis isabellina. After 5 days of incubation, 98% of the herbicide (added at 25 mg L(-1)) was found to be removed. The elimination of 2,4-D by U. isabellina was connected with the formation of 2,4-dichlorophenol (2,4-DCP), which resulted in a 60% decrease in the sample toxicity toward Artemia franciscana larvae...
November 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29136518/evidence-of-co-metabolic-bentazone-transformation-by-methanotrophic-enrichment-from-a-groundwater-fed-rapid-sand-filter
#13
Mathilde J Hedegaard, Hélène Deliniere, Carsten Prasse, Arnaud Dechesne, Barth F Smets, Hans-Jørgen Albrechtsen
The herbicide bentazone is recalcitrant in aquifers and is therefore frequently detected in wells used for drinking water production. However, bentazone degradation has been observed in filter sand from a rapid sand filter at a waterworks with methane-rich groundwater. Here, the association between methane oxidation and removal of bentazone was investigated with a methanotrophic enrichment culture derived from methane-fed column reactors inoculated with that filter sand. Several independent lines of evidence obtained from microcosm experiments with the methanotrophic enrichment culture, tap water and bentazone at concentrations below 2 mg/L showed methanotrophic co-metabolic bentazone transformation: The culture removed 53% of the bentazone in 21 days in presence of 5 mg/L of methane, while only 31% was removed in absence of methane...
November 3, 2017: Water Research
https://www.readbyqxmd.com/read/29136183/glyphosate-use-and-cancer-incidence-in-the-agricultural-health-study
#14
Gabriella Andreotti, Stella Koutros, Jonathan N Hofmann, Dale P Sandler, Jay H Lubin, Charles F Lynch, Catherine C Lerro, Anneclaire J De Roos, Christine G Parks, Michael C Alavanja, Debra T Silverman, Laura E Beane Freeman
Background: Glyphosate is the most commonly used herbicide worldwide, with both residential and agricultural uses. In 2015, the International Agency for Research on Cancer classified glyphosate as "probably carcinogenic to humans," noting strong mechanistic evidence and positive associations for non-Hodgkin lymphoma (NHL) in some epidemiologic studies. A previous evaluation in the Agricultural Health Study (AHS) with follow-up through 2001 found no statistically significant associations with glyphosate use and cancer at any site...
November 9, 2017: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/29136149/pesticide-use-in-agriculture-and-parkinson-s-disease-in-the-agrican-cohort-study
#15
Camille Pouchieu, Clément Piel, Camille Carles, Anne Gruber, Catherine Helmer, Séverine Tual, Elisabeth Marcotullio, Pierre Lebailly, Isabelle Baldi
Background and Aim: Epidemiological studies have reported an increased risk of Parkinson's disease (PD) in farmers exposed to pesticides, but no clear conclusion can be drawn on the type of pesticide and duration of use associated with an effect. In the French agricultural cohort AGRICAN, we assessed associations between PD and pesticide use according to the types of livestock and crops grown, including exposure to some active ingredients with duration of use. Methods: Self-reported PD and history of lifetime exposure to 13 crops and 5 types of animals and pesticide use were collected at enrolment (2005-07) among 181 842 participants...
November 9, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/29132822/bifunctionalized-ordered-mesoporous-organosilica-synthesized-in-deep-eutectic-solvent-for-extraction-of-triazine-herbicides-from-watermelon
#16
Zan Li, Jun Jia, Mingwei Wang, Hua Zhang, Hongyuan Yan, Fengxia Qiao
A C8-and-amino-bifunctionalized ordered mesoporous organosilica (C8-AMS) was prepared in a deep eutectic solvent-a green solvent-that was used as the reaction medium for this procedure instead of organic solvents or other catalyst for the first time. This method provided a nontoxic way for C8 grafting and obtaining an ordered mesoporous organosilica material with both hydrophilic and hydrophobic groups. Besides advantages such as its large surface area, regular and uniform pore size, and hydrothermal stability, the obtained bifunctionalized C8-AMS also have two main functional groups in the obtained structure, C8 and amino, which enriched the adsorption mechanism of the material and as a result improved the adsorption selectivity of C8-AMS...
October 31, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29132751/synthesis-biological-activities-and-sar-studies-of-new-3-substitutedphenyl-4-substitutedbenzylideneamino-1-2-4-triazole-mannich-bases-and-bis-mannich-bases-as-ketol-acid-reductoisomerase-inhibitors
#17
Bao-Lei Wang, Li-Yuan Zhang, Xing-Hai Liu, Yi Ma, Yan Zhang, Zheng-Ming Li, Xiao Zhang
A series of new 3-substitutedphenyl-4-substitutedbenzylideneamino-1,2,4-triazole Mannich bases and bis-Mannich bases were synthesized through Mannich reaction with high yields. Their structures were confirmed by means of IR, (1)H NMR, (13)C NMR and elemental analysis. The preliminary bioassay indicated that compounds 7g, 7h and 7l exhibited potent in vitro inhibitory activities against ketol-acid reductoisomerase (KARI) with Ki value of (0.38 ± 0.25), (6.59 ± 2.75) and (8.46 ± 3.99) μmol/L, respectively, and were comparable with IpOHA...
November 10, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29132125/simulation-of-photoreactive-transients-and-of-photochemical-transformation-of-organic-pollutants-in-sunlit-boreal-lakes-across-14-degrees-of-latitude-a-photochemical-mapping-of-sweden
#18
Birgit Koehler, Francesco Barsotti, Marco Minella, Tomas Landelius, Claudio Minero, Lars J Tranvik, Davide Vione
Lake water constituents, such as chromophoric dissolved organic matter (CDOM) and nitrate, absorb sunlight which induces an array of photochemical reactions. Although these reactions are a substantial driver of pollutant degradation in lakes they are insufficiently understood, in particular on large scales. Here, we provide for the first time comprehensive photochemical maps covering a large geographic region. Using photochemical kinetics modeling for 1048 lakes across Sweden we simulated the steady-state concentrations of four photoreactive transient species, which are continuously produced and consumed in sunlit lake waters...
October 30, 2017: Water Research
https://www.readbyqxmd.com/read/29131995/thermal-air-oxidation-changes-surface-and-adsorptive-properties-of-black-carbon-char-biochar
#19
Feng Xiao, Alemayehu H Bedane, Julia Xiaojun Zhao, Michael D Mann, Joseph J Pignatello
In this study, we systematically investigated the effects of thermal air oxidation on the properties of biomass-derived black carbon (BC) made at carbonization temperatures (HTTs) of 300-700°C. BC produced by including air in the carbonization step was found to have a low surface area and underdeveloped pore structure. Substantial changes of BC were observed after post-pyrolysis thermal air oxidation (PPAO). Well-carbonized BC samples made anoxically at relatively high HTTs (600 and 700°C) showed, after PPAO, significant increases in N2 BET surface area (SA) (up to 700 times), porosity (<60Å) (up to 95 times), and adsorptivity (up to 120 times) of neutral organic species including two triazine herbicides and one natural estrogen...
November 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29131614/halloysite-tubes-as-nanocontainers-for-herbicide-and-its-controlled-release-in-biodegradable-poly-vinyl-alcohol-starch-film
#20
Bangchao Zhong, Song Wang, Huanhuan Dong, Yuanfang Luo, Zhixin Jia, Xiangyang Zhou, Mingzhou Chen, Dong Xie, Demin Jia
Commercial herbicide atrazine (AT) was first loaded into the lumen of halloysite nanotubes (HNTs) in the amount of 9 wt %, and then the AT-loaded HNTs (HNTs-AT) were further incorporated into poly(vinyl alcohol)/starch composites (PVA/ST, with the weight ratio of 80/20) to construct a dual drug delivery system. AT loaded in nanotubes displayed much slower release from PVA/ST film in water than free AT; for example, the total release amount of AT from PVA/ST film with loaded AT was only 61% after 96 h, while this value reached 97% in PVA/ST film with free AT...
November 17, 2017: Journal of Agricultural and Food Chemistry
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