Consequences of Arsenic in the Environment | IntechOpen
Throughout the environment, including in food, water, soil, and the air, arsenic is a naturally occurring metalloid. An important global problem is the human exposure to arsenic from numerous sources, such as polluted groundwater and other human activities. It poses a serious danger to people's health, economic security, and …
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Arsenic acquisition, toxicity and tolerance in plants
Arsenic tolerance and detoxification in plants. Arsenic tolerance mechanisms in plants compass a variety of approaches. These approaches can be either to restrict or reduce arsenic uptake by the roots, and/or lemmatise arsenic translocation to the aerial plant tissues. ... (2020) reported exogenous application of melatonin not only …
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Understanding arsenic dynamics in agronomic systems to …
The use of iron-based amendments increases in the concentration of free iron oxide in the soil, retarding the release of arsenite from the solid phase into soil solution, (mentioned in Section 4.1 and discussed in Section 5), whereas silica fertilization inhibits arsenic uptake by competitive inhibition at the plant root surface while adding an ...
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Arsenic Contamination in Soil and Water Across South East …
Heavy accumulation of arsenic in the plant tissues stimulates the production of reactive oxygen species (ROS) which in turn ... reported that the increase in arsenic concentration from 0.25 to 0.5 mm in seedlings of wheat noted 41 and 95% increase in H 2 O 2 content and on the other hand antioxidant-scavenging and the glyoxalase systems …
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Multifarious Effects of Arsenic on Plants and Strategies for
The ability of bacteria to reduce arsenic uptake and increase plant growth was observed in both C3 (barley) and C4 (maize) plants. An actinomycete, Nocardiopsis lucentensis S5, isolated from As-contaminated soil, reduced the arsenic uptake in both maize and barley by increasing the As retention in the rhizosphere . It increased the citric …
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Arsenic stress in plants: A metabolomic perspective
Arsenic in the environment and its uptake in plants. Arsenic can enter the aquatic and terrestrial ecosystems via two routes: naturally and anthropogenically (A), in …
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Arsenic Contamination in Rice and the Possible Mitigation …
Exogenic use of Fe causes the formation of oxides of Fe in form of Fe plaques surrounding rice plant roots, which reduces As uptake, increases co-precipitation of Fe and arsenic. Due to the presence of anaerobic condition during rice cultivation triggers the production of plaques (Fe) at the at the root surface.
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Arsenic in the Soil-Plant-Human Continuum in Regions of …
Sustained intake of arsenic-contaminated food increases arsenic body burden in humans and may lead to arsenicosis, black foot disease, and diseases of the heart and lungs [14, 16]. Occupational exposure can occur during industrial processes such as mining and production/processing as well as during the use of wood and leather …
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Arsenic acquisition, toxicity and tolerance in plants
Arsenic causes biochemical and molecular damage in plants by two different mechanisms: 1) concomitant increase in ROS generation and accumulation in plant …
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Frontiers | Arsenic Transport in Rice and Biological Solutions …
Rice (Oryza sativa L.) feeds ∼3 billion people. Due to the wide occurrence of arsenic (As) pollution in paddy soils and its efficient plant uptake, As in rice grains presents health risks. Genetic manipulation may offer an effective approach to reduce As accumulation in rice grains. The genetics of As uptake and metabolism have been …
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Full article: Advances in study on the effects of arbuscular
The effect of AMF on plants. In the phytoremediation of arsenic-contaminated soil, AMF plays an important role in improving the mineral nutrition of plants, promoting their growth (Su et al. Citation 2017), affecting the absorption and transport of heavy metals and improving the tolerance of plants to arsenic stress (Schneider et al. …
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Mechanism of arsenic uptake, translocation and plant resistance …
(iii) As expected, when soil As concentrations increase, the variability of grain As concentrations also increases, indicating that plants induce their As resistance mechanisms when exposed to soils with high concentrations of As. ... Arsenic resistance mechanisms in plants span a range of strategies (Ahmad et al., 2012, Tripathi et al., ...
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A review on arsenic in the environment: bio …
Terrestrial plant. Arsenic is a non-essential element accu-mulated in plants via oxidative and/or genotoxic mechanisms depending upon several factors. It can enter plants through soil, ... more sensitive to As accumulation. 47,51–54 Arsenic concentration increases in the sequence: rice grain < husk < straw root.48–50
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(PDF) Melatonin and plant growth-promoting rhizobacteria alleviate the
Melatonin and plant growth-promoting rhizobacteria alleviate the cadmium and arsenic stresses and increase the growth of Spinacia oleracea L. May 2020 Plant, Soil and Environment 66(No. 5)
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Inoculation of Azospirillum brasilense and exogenous …
A treatment without arsenic or amendments was maintained as control. Arsenic-induced physiological damages were noticed in the wheat plants. Detrimental effects on the plant physiological functions, such as disruption of cell membrane stability, reduced water uptake, and stomatal functions, were noticed with increase in As toxicity.
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Antioxidants | Free Full-Text | Multi-Component …
Arsenic (As) contaminates the food chain and decreases agricultural production through impairing plants, particularly due to oxidative stress. To better understand the As tolerance mechanisms, two contrasting tobacco genotypes: As-sensitive Nicotiana sylvestris and As-tolerant N.tabacum, cv. 'Wisconsin' were analyzed. The most …
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Consequences of Arsenic Exposure in Plant-Health Status
Exposure to arsenic increases the risk of developing liver, lung, kidney, and bladder malignancies as well as vascular illnesses such as stroke, ischemic heart …
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Arsenic Hyperaccumulation Strategies: An Overview
Arsenic hyperaccumulator plants have developed various strategies to accumulate and tolerate high concentrations of As. In these plants, the formation of AsIII …
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Arsenic perception and signaling: The yet unexplored world
In bacteria, yeast and plants arsenic uptake and detoxification mechanisms are essentially similar. As(V), is structurally similar to phosphate ... ABA increases arsenic tolerance mainly by increasing glutathione (GSH) and phytochelatins (PCs), which in turn promotes the accumulation of arsenic in the vacuole. In rice, ABA may also be involved ...
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Exogenous Glutathione Increases Arsenic Translocation Into …
Glutathione (GSH) plays diverse roles in the physiological processes, stress defense, growth, and development of plants. This study investigated the effects of exogenous GSH on the biochemical responses of reactive oxygen species and antioxidant levels in rice (Oryza sativa L. cv. Dasan) seedlings under arsenic (As) stress.As …
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Arsenic-Induced Oxidative Stress and Antioxidant Defense in Plants …
The non-essential metalloid arsenic (As) is widely distributed in soil and underground water of many countries. Arsenic contamination is a concern because it creates threat to food security in terms of crop productivity and food safety. Plants exposed to As show morpho-physiological, growth and developmental disorder which altogether result in loss of …
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Arsenic uptake and bioaccumulation in plants: A review on …
Besides, genes from other plant species, i.e., exogenous gene ACR 3 increases the flow of arsenic in the plant whereas AsrM reported to converse arsenic into methylation and volatilization (Fig. 3). Most importantly, genes editing can be used to decrease the arsenic concentration in rice ( Chen et al., 2017 ).
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Plant Growth-Promoting and Arsenic Accumulation …
Chang, W., Hou, X., Yan, Y. et al. Plant Growth-Promoting and Arsenic Accumulation Reduction Effects of Two Endophytic Bacteria Isolated from …
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Arsenic Uptake and Bioaccumulation in Plants: A …
ROS causes cell damage by dissolving the structure of lipids, proteins, and DNA. As a result, increasing plants' resistance to ROS-induced oxidative stress is an …
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Arsenic Uptake, Toxicity, Detoxification, and Speciation in Plants …
1. Introduction. Contamination of air, soil, and water resources with potentially toxic elements (PTEs) is a global environmental issue [1,2].Most of the PTEs are toxic to plants and animals including humans [3,4,5].Among the PTEs, arsenic (As) is considered as one of the most highly toxic and carcinogenic [6,7,8,9].The US Environmental …
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Agronomy | Free Full-Text | Arsenic Accumulation in Rice …
(a) Production of transgenic plants to yield low arsenic-rice is the biotechnological approach, where overexpression of one or more gene(s) in plants, like, Overexpression phytochelatin synthase (PCS) gene (higher phytochelatin production in roots leads to increase arsenic-thiol complexation and decreased arsenic translocation …
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Toxics | Free Full-Text | Arsenic Soil Contamination and Its
Arsenic represents a serious health threat in localities with a high arsenic-polluted environment and can easily get into the human food chain through agronomy production in areas affected by arsenic contamination. Onion plants that were grown in controlled conditions in arsenic-contaminated soil (5, 10, and 20 ppm) were harvested 21 …
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Arsenic Uptake, Toxicity, Detoxification, and …
Environmental contamination with arsenic (As) is a global environmental, agricultural and health issue due to the highly toxic and carcinogenic nature of As. …
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Arsenic Phytoremediation: Finally a Feasible Approach in the …
4.1.2 Arsenic plant tolerance improvement: increasing thiol-rich compound production. As(III) chelated with sulfhydryl-rich proteins forms complexes that get sequestered into the vacuoles through vacuolar transporters. ... In plants, arsenic exposure increases GSH content, which has been correlated with the feedback induction and …
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Enhanced Effect of Phytoextraction on Arsenic …
The gradually increasing presence of arsenic, a highly toxic heavy metal, poses a significant threat to both soil environmental safety and human health. Pteris vittata has long been recognized as an efficient hyperaccumulator plant for arsenic pollution. However, the pattern of arsenic accumulation in soil impacts its bioavailability and …
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