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https://www.readbyqxmd.com/read/29163592/reciprocal-interactions-between-cadmium-induced-cell-wall-responses-and-oxidative-stress-in-plants
#1
REVIEW
Christophe Loix, Michiel Huybrechts, Jaco Vangronsveld, Marijke Gielen, Els Keunen, Ann Cuypers
Cadmium (Cd) pollution renders many soils across the world unsuited or unsafe for food- or feed-orientated agriculture. The main mechanism of Cd phytotoxicity is the induction of oxidative stress, amongst others through the depletion of glutathione. Oxidative stress can damage lipids, proteins, and nucleic acids, leading to growth inhibition or even cell death. The plant cell has a variety of tools to defend itself against Cd stress. First and foremost, cell walls might prevent Cd from entering and damaging the protoplast...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29162925/toxicological-and-biochemical-responses-of-the-earthworm-eisenia-fetida-to-cyanobacteria-toxins
#2
Qing Cao, Alan D Steinman, Lei Yao, Liqiang Xie
Irrigation with eutrophic water containing cyanobacteria toxins poses a potential risk to soil animals. To evaluate ecotoxicological effect of microcystins (MCs) on earthworms, filter paper acute toxicity test, avoidance test and a 14-d artificial soil test were carried out. No acute toxicity was found in the filter paper test, and earthworms showed no avoidance response to MCs exposure. In the artificial soil test, Eisenia fetida were allowed to grow in presence or absence of MCs (0, 1, 10, 100, 1000 μg kg(-1) of soil) for 1, 7, and 14 d...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29161325/the-mechanisms-of-humic-substances-self-assembly-with-biological-molecules-the-case-study-of-the-prion-protein
#3
Gabriele Giachin, Ridvan Nepravishta, Walter Mandaliti, Sonia Melino, Alja Margon, Denis Scaini, Pierluigi Mazzei, Alessandro Piccolo, Giuseppe Legname, Maurizio Paci, Liviana Leita
Humic substances (HS) are the largest constituent of soil organic matter and are considered as a key component of the terrestrial ecosystem. HS may facilitate the transport of organic and inorganic molecules, as well as the sorption interactions with environmentally relevant proteins such as prions. Prions enter the environment through shedding from live hosts, facilitating a sustained incidence of animal prion diseases such as Chronic Wasting Disease and scrapie in cervid and ovine populations, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/29159454/phosphorus-transformations-in-plant-based-and-bio-waste-materials-induced-by-pyrolysis
#4
James Stephen Robinson, Karen Baumann, Yongfeng Hu, Philipp Hagemann, Lutz Kebelmann, Peter Leinweber
Strategies are needed to increase the sustainability of phosphorus (P) fertiliser management in agriculture. This paper reports on the potential of pyrolysis treatment to recycle P from renewable materials previously regarded as wastes. The study used K-edge X-ray absorption near-edge structure (XANES) spectroscopy to examine chemical forms of P in the waste feedstock materials and corresponding biochars (pyrolysis at 480-500 °C) of four ligno-cellulosic, plant-based residues and five relatively P-rich livestock and water-treatment by-products, to acquire information on changes in potential P fertiliser value...
November 20, 2017: Ambio
https://www.readbyqxmd.com/read/29159439/isolation-of-lead-resistant-arthrobactor-strain-gq-9-and-its-biosorption-mechanism
#5
Tianqi Wang, Jun Yao, Zhimin Yuan, Yue Zhao, Fei Wang, Huilun Chen
In this study, lead-resistant bacterium Arthrobacter sp. GQ-9 with a resistant capability to cadmium, zinc, and copper was isolated from a heavy metal polluted soil. Microcalorimetry analysis was applied to assess the strain's microbial activity under Pb(II) stress and suggested that GQ-9's microbial activities under Pb(II) stress were stronger than a non-resistant strain. Biosorption batch experiments revealed that the optimal condition for adsorption of Pb(II) by GQ-9 was pH 5.5, a biomass dosage of 1.2 g L(-1), and an initial Pb(II) concentration of 100 mg L(-1) with a maximum biosorption capacity of 17...
November 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29158624/plant-growth-under-water-salt-stress-ros-production-antioxidants-and-significance-of-added-potassium-under-such-conditions
#6
Mohammad Abass Ahanger, Nisha Singh Tomar, Megha Tittal, Surendra Argal, R M Agarwal
Plants are confronted with a variety of environmenmtal stresses resulting in enhanced production of ROS. Plants require a threshold level of ROS for vital functions and any change in their concentration alters the entire physiology of plant. Delicate balance of ROS is maintained by an efficient functioning of intriguing indigenous defence system called antioxidant system comprising enzymatic and non enzymatic components. Down regulation of antioxidant system leads to ROS induced oxidative stress causing damage to important cellular structures and hence anomalies in metabolism...
October 2017: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/29156304/water-management-regimes-alter-pb-uptake-and-translocation-in-fragrant-rice
#7
Umair Ashraf, Saddam Hussain, Nadeem Akbar, Shakeel Ahmad Anjum, Waseem Hassan, Xiangru Tang
Rice cultivation in lead (Pb) polluted soils often leads to high Pb contents in rice grains. The present study investigated the dynamics of Pb uptake under different water regimes in two fragrant rice cultivars i.e., Guixiangzhan and Nongxiang-18. Results revealed that water dynamics regulated the antioxidant activities in both rice cultivars under Pb toxicity. Compared to continuous ponding (CP), taken as control, alternate wetting and drying (AWD) reduced the Pb contents in roots, stems, leaves, and grains up to 17%, 41%, 22%, and 52% in Guixiangzhan and 23%, 19%, 17%, and 37% in Nongxiang-18, respectively...
November 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29154175/improving-human-health-outcomes-with-a-low-cost-intervention-to-reduce-exposures-from-lead-acid-battery-recycling-dong-mai-vietnam
#8
Bret Ericson, Thi To Duong, John Keith, Trong Cuu Nguyen, Deborah Havens, William Daniell, Catherine J Karr, Doan Ngoc Hai, Lo Van Tung, Tran Thi Nhi Ha, Brian Wilson, David Hanrahan, Gerry Croteau, Mark Patrick Taylor
This study details the first comprehensive evaluation of the efficacy of a soil lead mitigation project in Dong Mai village, Vietnam. The village's population had been subject to severe lead poisoning for at least a decade as a result of informal Used Lead Acid Battery (ULAB) recycling. Between July 2013 to February 2015, Pure Earth and the Centre for Environment and Community Development (Hanoi, Vietnam) implemented a multi-faceted environmental and human health intervention. The intervention consisted of a series of institutional and low-cost engineering controls including the capping of lead contaminated surface soils, cleaning of home interiors, an education campaign and the construction of a work-clothes changing and bathing facility...
November 15, 2017: Environmental Research
https://www.readbyqxmd.com/read/29151186/biochar-effects-on-uptake-of-cadmium-and-lead-by-wheat-in-relation-to-annual-precipitation-a-3-year-field-study
#9
Fengfeng Sui, Jing Zuo, De Chen, Lianqing Li, Genxing Pan, David E Crowley
Biochar has been widely studied for its ability to reduce plant uptake of heavy metals by lowering metal bioavailabilities through adsorption and pH-driven fixation reactions. However, the long-term effect of biochar on heavy metal bioavailabilities in alkaline soils under natural redox condition is rarely studied. Here, we report a study examining the effects of biochar on bioavailability and partitioning of cadmium (Cd) and lead (Pb) among different soil fractions over 3 years in a field study with wheat (Triticum aestivum L...
November 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29150255/effects-of-red-earthworms-eisenia-fetida-on-leachability-of-lead-minerals-in-soil
#10
Armin Kavehei, Grant C Hose, Damian B Gore
Contamination of soils by metals and metalloids is an important environmental problem in many residential and industrial sites around the world. Lead is a common contaminant, which enters the soil through mining, industrial activities and waste disposal. A range of technologies can be used to remediate soil lead, however most remediation technologies adversely affect the environment and particularly soil biota. We have assessed the efficacy of vermiremediation (the use of earthworms for remediation) to reduce water extractable lead concentrations in soil...
November 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29149838/genetic-variation-in-populations-of-the-earthworm-lumbricus-rubellus-across-contaminated-mine-sites
#11
Craig Anderson, Luis Cunha, Pierfrancesco Sechi, Peter Kille, David Spurgeon
BACKGROUND: Populations of the earthworm, Lumbricus rubellus, are commonly found across highly contaminated former mine sites and are considered to have under-gone selection for mitigating metal toxicity. Comparison of adapted populations with those found on less contaminated soils can provide insights into ecological processes that demonstrate the long-term effects of soil contamination. Contemporary sequencing methods allow for portrayal of demographic inferences and highlight genetic variation indicative of selection at specific genes...
November 17, 2017: BMC Genetics
https://www.readbyqxmd.com/read/29147987/dynamics-of-natural-revegetation-of-hydrocarbon-contaminated-soil-and-remediation-potential-of-indigenous-plant-species-in-the-steppe-zone-of-the-southern-volga-uplands
#12
Leonid Panchenko, Anna Muratova, Ekaterina Dubrovskaya, Sergey Golubev, Olga Turkovskaya
The result of monitoring of natural vegetation growing on oil-contaminated (2.0-75.6 g/kg) and uncontaminated (0.04-2.0 g/kg) soils of a petroleum refinery for a period of 13 years is presented. Floristic studies showed that the families Poaceae, Asteraceae, Fabaceae, and eventually Brassicaceae were predominant in the vegetation cover of both types of soils. Over time, the projective vegetation cover of the contaminated sites increased from 46 to 90%; the species diversity increased twofold: in the ecological-cenotic structure of the flora, the number of ruderal plant species decreased; and the number of steppe, i...
November 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29147985/deciphering-the-growth-organic-acid-exudations-and-ionic-homeostasis-of-amaranthus-viridis-l-and-portulaca-oleracea-l-under-lead-chloride-stress
#13
Muhammad Tariq Javed, Muhammad Sohail Akram, Noman Habib, Kashif Tanwir, Qasim Ali, Nabeel Khan Niazi, Huma Gul, Naeem Iqbal
Lead (Pb) stress adversely affects in planta nutrient homeostasis and metabolism when present at elevated concentration in the surrounding media. The present study was aimed at investigation of organic acid exudations, elemental contents, growth, and lipid peroxidation in two wild plants (Amaranthus viridis L. and Portulaca oleracea L.), exhibiting differential root to shoot Pb translocation, under Pb stress. Plants were placed in soil spiked with lead chloride (PbCl2) concentrations of 0, 15, 30, 45, or 60 mg Pb/kg soil, in rhizoboxes supplied with nylon nets around the roots...
November 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29147721/osteomimicry-how-the-seed-grows-in-the-soil
#14
REVIEW
Nadia Rucci, Anna Teti
Metastasis is defined as a very inefficient process, since less than 0.01% of cancer cells injected into the circulation will engraft in a distant organ, where they must acquire the ability to survive and proliferate inside a "foreign" environment. In bone metastases, the interaction with the host organ is much more favoured if tumour cells gain "osteomimicry", that is the ability to resemble a resident bone cell (i.e. the osteoblast), thus intruding in the physiology of the bone. This is accomplished by the expression of osteoblast markers (e...
November 16, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/29146962/microbial-communities-in-the-native-habitats-of-agaricus-sinodeliciosus-from-xinjiang-province-revealed-by-amplicon-sequencing
#15
Jiemin Zhou, Xuming Bai, Ruilin Zhao
Agaricus sinodeliciosus is an edible species described from China and has been successfully cultivated. However, no studies have yet reported the influence factors implicated in the process of fructification. To better know abiotic and biotic factors, physiochemical characteristics and microbial communities were investigated in five different soil samples collected in the native habitats of specimens from northern Xinjiang, southern Xinjiang, and Zhejiang Province, respectively. There are major differences in texture and morphology among different specimens of A...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146250/revitalization-of-plant-growth-promoting-rhizobacteria-for-sustainable-development-in-agriculture
#16
REVIEW
Sushanto Gouda, Rout George Kerry, Gitishree Das, Spiros Paramithiotis, Han-Seung Shin, Jayanta Kumar Patra
The progression of life in all forms is not only dependent on agricultural and food security but also on the soil characteristics. The dynamic nature of soil is a direct manifestation of soil microbes, bio-mineralization, and synergistic co-evolution with plants. With the increase in world's population the demand for agriculture yield has increased tremendously and thereby leading to large scale production of chemical fertilizers. Since the use of fertilizers and pesticides in the agricultural fields have caused degradation of soil quality and fertility, thus the expansion of agricultural land with fertile soil is near impossible, hence researchers and scientists have sifted their attention for a safer and productive means of agricultural practices...
January 2018: Microbiological Research
https://www.readbyqxmd.com/read/29145477/the-abundance-of-health-associated-bacteria-is-altered-in-pah-polluted-soils-implications-for-health-in-urban-areas
#17
Anirudra Parajuli, Mira Grönroos, Sari Kauppi, Tomasz Płociniczak, Marja I Roslund, Polina Galitskaya, Olli H Laitinen, Heikki Hyöty, Ari Jumpponen, Rauni Strömmer, Martin Romantschuk, Nan Hui, Aki Sinkkonen
Long-term exposure to polyaromatic hydrocarbons (PAHs) has been connected to chronic human health disorders. It is also well-known that i) PAH contamination alters soil bacterial communities, ii) human microbiome is associated with environmental microbiome, and iii) alteration in the abundance of members in several bacterial phyla is associated with adverse or beneficial human health effects. We hypothesized that soil pollution by PAHs altered soil bacterial communities that had known associations with human health...
2017: PloS One
https://www.readbyqxmd.com/read/29144431/bioabsorption-and-bioaccumulation-of-cadmium-in-the-straw-and-grain-of-maize-zea-mays-l-in-growing-soils-contaminated-with-cadmium-in-different-environment
#18
Jorge Retamal-Salgado, Juan Hirzel, Ingrid Walter, Iván Matus
There is a worldwide increase of heavy metal or potentially toxic element (PTE), contamination in agricultural soils caused mainly by human and industrial action, which leads to food contamination in crops such as in maize. Cadmium (Cd) is a PTE often found in soils and it is ingested through food. It is necessary to determine the bioabsorption, distribution, and accumulation levels in maize to reduce or prevent food chain contamination. Cadmium absorption and accumulation in three maize cultivars were evaluated in three agricultural environments in Chile by increasing CdCl₂ rates (0, 1, and 2 mg·kg(-1))...
November 16, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29143730/genetic-diversity-and-symbiotic-effectiveness-of-bradyrhizobium-strains-nodulating-selected-annual-grain-legumes-growing-in-ethiopia
#19
Tulu Degefu, Endalkachew Wolde-Meskel, Frank Rasche
Vigna unguiculata, Vigna radiata and Arachis hypogaea growing in Ethiopia are nodulated by a genetically diverse group of Bradyrhizobium strains. To determine the genetic identity and symbiotic effectiveness of these bacteria, a collection of 36 test strains originating from the root nodules of the three hosts was investigated using multilocus sequence analyses (MLSA) of core genes including 16S rRNA, recA, glnII, gyrB, atpD and dnaK. Sequence analysis of nodA and nifH genes along with tests for symbiotic effectiveness using δ(15)N analysis were also carried out...
November 16, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29143279/arabidopsis-noncoding-rna-modulates-seedling-greening-during-deetiolation
#20
Yuqiu Wang, Jian Li, Xing-Wang Deng, Danmeng Zhu
Seedling greening is essential for the survival of plants emerging from the soil. The abundance of chlorophyll precursors, including protochlorophyllide (Pchlide), is precisely controlled during the dark-to-light transition, as over-accumulation of Pchlide can lead to cellular photooxidative damage. Previous studies have identified and characterized multiple regulators controlling this important process. HID1 (hidden treasure 1) is the first noncoding RNA (ncRNA) found in photomorphogenesis. Under continuous red light, HID1 has been shown to inhibit hypocotyl elongation by repressing the transcription of PIF3 (phytochrome interacting factor 3)...
October 13, 2017: Science China. Life Sciences
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