Knocking Out OsPT4 Gene Decreases Arsenate Uptake by Rice ...

Arsenic (As) accumulation in rice grains poses health risk to humans. Plants including rice take up arsenate (AsV) by phosphate transporters. In this study, rice phosphate transporter OsPT4 (OsPht1;4) was investigated based on two independent T-DNA insertion mutants of OsPT4 (M1 and M2), which displayed stronger AsV resistance than wild types WT1 and WT2.

Arsenic uptake and metabolism in plants | Request PDF

Arsenic uptake, translocation, accumulation, and toxicity in plants and food crops depend on environmental conditions, plant species, and the bioavailability of As species (Bhattacharya et al., 2012).

Arsenic and Lead Uptake by Vegetable Crops Grown on ...

Plant uptake coefficients (UCs), quantified by the uptake slopes for the crop metal-total soil metal regressions (see the last column of Table 2) show As UCs to be higher than those of Pb for the edible part of all crops except tomatoes. However, when these uptake factors are recalculated based on soluble rather than total metals in the soils ...

Figure 2 from Arsenic uptake and metabolism in plants ...

Arsenic (As) is an element that is nonessential for and toxic to plants. Arsenic contamination in the environment occurs in many regions, and, depending on environmental factors, its accumulation in food crops may pose a health risk to humans.Recent progress in understanding the mechanisms of As uptake and metabolism in plants is reviewed here.

Agronomy | Free Full-Text | Arsenic Accumulation in Rice ...

Arsenic uptake and accumulation by rice plants are influenced at both lower and higher pH. It may be due to the fact that at very low pH (pH < 5) arsenic-binding species, such as Fe-oxyhydroxide compounds, becoming more soluble and enhancing the arsenic uptake by plants.

Frontiers | Arsenic Toxicity: The Effects on Plant ...

The two forms of inorganic arsenic, arsenate (AsV) and arsenite (AsIII), are easily taken up by the cells of the plant root. Once in the cell, AsV can be readily converted to AsIII, the more toxic of the two forms. AsV and AsIII both disrupt plant …

Arsenic uptake by plants and possible phytoremediation ...

Dec 28, 2011· This review focuses the behaviour of arsenic in plant–soil and plant–water systems, arsenic–plant cell interactions, phytoremediation, and biosorption. Arsenate and arsenite uptake by plants varies in different environment conditions. An eco-friendly and low-cost method for arsenic removal from soil–water system is phytoremediation, in which living plants are used to remove arsenic ...

ars1, an Arabidopsis mutant exhibiting increased tolerance ...

Aug 12, 2003· Lai Qing Lou, Gao Ling Shi, Jing Hao Wu, Shun Zhu, Meng Qian, Hai Zhen Wang, Qing Sheng Cai, The Influence of Phosphorus on Arsenic Uptake/Efflux and As Toxicity to Wheat Roots in Comparison with Sulfur and Silicon, Journal of Plant …

Arsenic uptake and metabolism in plants. | Semantic Scholar

Arsenic (As) is an element that is nonessential for and toxic to plants. Arsenic contamination in the environment occurs in many regions, and, depending on environmental factors, its accumulation in food crops may pose a health risk to humans.Recent progress in understanding the mechanisms of As uptake and metabolism in plants …

Uptake of Arsenic by Plants Grown Near CCA Preserved Wood ...

Arsenic uptake by edible plants grown near structures built with this material is one exposure pathway since there is the potential for edible plants to uptake arsenic leached from the wood. This project addresses these concerns by determining the major factors influencing plant uptake of arsenic …

Arsenic and Lead Uptake by Vegetable Crops Grown on ...

3.6. Pb and As Uptake by All Crops 3.6.1. Pb and As Plant Uptake Factors. ANOVA revealed that, for As and Pb, both the soil factor and crop type were highly significant in determining the concentration of these elements in the edible crop.Each crop contained significantly different concentrations of both As and Pb when grown on the same soil, and therefore crops had different UCs.

Arsenic Uptake in Plants - Bethel College

Arsenic Uptake in Plants 7. Atomic Absorption Spectroscopy Atomic absorption spectroscopy (AAS) was used to determine the levels of arsenic present in the plants. This analytical technique measures the concentrations of elements based on the Beer-Lambert Law, which states that absorbance and concentration are directly correlated ...

A Review on Heavy Metals (As, Pb, and Hg) Uptake by Plants ...

The arsenic uptake in S. polyrhiza L. occurred through the phosphate uptake pathway as well as by physicochemical adsorption on Fe plaques of plant's surfaces. The arsenate uptake in the plant is related to the Fe ion and phosphate concentrations in culture medium while DMAA was not.

Phosphate Transporter PvPht1;2 Enhances Phosphorus ...

Phosphorus is an important macronutrient for plant growth and is acquired by plants mainly as phosphate (P). Phosphate transporters (Phts) are responsible for P and arsenate (AsV) uptake in plants including arsenic-hyperaccumulator Pteris vittata. P. vittata is efficient in AsV uptake and P utilization, but the molecular mechanism of its P uptake is largely unknown. In this study, a P. vittata ...

What are the Routes of Exposure for Arsenic?

Oct 01, 2009· Arsenic uptake in plants does not appear to reach levels dangerous to human health [Rossman 2007]. Inhalation exposure to coal fly ash may occur in some countries when coal that is contaminated with high levels of arsenic …

Arsenic toxicity: an overview - MedCrave online

Heavy metals are member of ill-defined subset of elements, weathered from natural rock formations, widely distributed in the Earth's crust. Generally, heavy metals occurred in particulate or dissolved …

Arsenic uptake and metabolism in arsenic resistant and ...

147 · Until recently, arsenic speciation in plant tissues was poorly understood, with the majority of …

Arsenic - GreenFacts

Arsenic is generally present in sea-living animals at higher levels than in freshwater animals, or plants and animals that live on land. Plants on land can accumulate arsenic compounds via uptake from …

Frontiers | Arsenic Hyperaccumulation Strategies: An ...

Arsenic (As) pollution, which is on the increase around the world, poses a growing threat to the environment. Phytoremediation, an important green technology, uses different strategies, including As uptake, transport, translocation, and detoxification, to remediate this metalloid. Arsenic hyperaccumulator plants have developed various strategies to accumulate and tolerate high …

Arsenic uptake, accumulation and toxicity in rice plants ...

Feb 03, 2017· Arsenic (As) is a toxic metalloid. Serious concerns have been raised in literature owing to its potential toxicity towards living beings. The metalloid causes various water- and food-borne diseases. Among food crops, rice contains the highest concentrations of As. Consuming As-contaminated rice results in serious health issues. Arsenic concentration in rice is governed by various factors in ...

Arsenic Uptake, Toxicity, Detoxification, and Speciation ...

Jan 02, 2018· Arsenic uptake by plant species relies on its total concentration and, importantly, on the speciation of As in soil—which is thought to be dependent upon exchangeable (bioavailable) As concentration in soil [17,18,28].

Arsenic in Plants | Dartmouth Toxic Metals

Interestingly, different varieties of rice from all over the world grown on the same soil accumulated different amounts and different species of arsenic. The key to resolving arsenic accumulation in food plants lies in understanding the genes that control uptake from the soil and storage within the plant…

Uptake Kinetics of Arsenic Species in Rice Plants | Plant ...

Uptake Kinetics of Arsenic Species in Rice Plants Mohammed Joinal Abedin, Jörg Feldmann, Andy A. Meharg Plant Physiology Mar 2002, 128 (3) 1120-1128; DOI: 10.1104/pp.010733

A fern that hyperaccumulates arsenic | Nature

Brake fern plants grown in the laboratory were transferred to 2.5-litre pots (one plant per pot, with four replicates) containing 1.5 kg soil to determine arsenic-uptake changes with time and the ...

(PDF) Arsenic Uptake and Translocation in Plants

Arsenic Uptake and Translocation in Plants Article (PDF Available) in Plant and Cell Physiology 57(1) · October 2015 with 451 Reads How we measure 'reads'

Arsenic uptake and metabolism in arsenic resistant and ...

Until recently, arsenic speciation in plant tissues was poorly understood, with the majority of studies concentrating on the transformation of arsenical pesticides in crops such as rice, or uptake of arsenic species by plants (Hiltbold, 1975; Marin et al., 1993; Carbonell‐Barrachina et al., 1998). A series of recent papers has transformed ...

Arsenic and Lead Uptake by Vegetable Crops Grown on an Old ...

The potential for lead (Pb) and arsenic (As) transfer into vegetables was studied in an old orchard land contaminated with lead arsenate pesticides. Root (carrot), leafy (lettuce), and vegetable fruits (green bean, tomato) were grown on seven "miniplots" with soil concentrations ranging from near background to ≈800 and ≈200 mg kg−1 of total Pb and As, respectively.

Dynamics of gene expression associated with arsenic uptake ...

Genes associated with arsenite uptake and transport in rice plants (i.e., OsLsi1, OsLsi2, OsLsi3, OsLsi6 and OsABCC1) have been identified to date. However, their expression over time during the whole growth period of rice under arsenite stress conditions is still poorly understood. In this study, the dynamics of gene expression associated with arsenite transport and arsenic …