New Molecular Mechanisms to Reduce Arsenic in Crops

Lindsay, Emma Rebecca; Maathuis, Franciscus Johannes Maria

doi:10.1016/j.tplants.2017.09.015

Cited by 90 publications

(50 citation statements)

References 60 publications

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“…Similar observation has been reported in beans (Caporale et al 2013), tomato (Carbonell-Barrachina et al 1998;Stazi et al 2016) lettuce and radish (Smith et al 2009). Plants in general prevent toxic compounds from reaching photosynthetic tissues, and thus, As concentrations in roots are about 5-20 times higher than in shoots (Lindsay & Matthuis 2017). Plants alleviate toxicity by binding As to the -SH (sulfahydryl) groups of thiols and sequester the As-PC (phytochelatin) complex in the root vacuoles, thus reducing the translocation to aerial parts (Ronzan et al 2017).…”

Section: Arsenic Concentration In the Plant Parts And Transfer Factorsupporting

confidence: 70%

Effect of irrigation water containing arsenic on elemental composition of bean and lettuce plants cultivated in calcareous sandy soil

Sandil

Dobosy

Kröpfl

et al. 2019

Food Prod Process and Nutr

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Background: The uptake of arsenic by vegetables from soil irrigated with arsenic enriched groundwater poses a major health hazard. The edible portion of these vegetables transfer arsenic to the human beings. The uptake of arsenic was studied in bean (Phaseolus vulgaris L.) and lettuce (Lactuca sativa L.) in a controlled greenhouse pot culture with calcareous sandy soil as substrate. The plants were irrigated with water containing sodium arsenate at concentrations 0.1, 0.25 and 0.5 mg L − 1. The total arsenic concentration of the different plants parts was determined by ICP-MS, following microwave-assisted acid digestion. The change in plant biomass production and essential macroelements (Mg, P, K) and microelements concentration (Fe, Mn, Cu, Zn) was also studied. Results: The As concentration in the bean was in the order: root>stem>leaf>bean fruit and in lettuce: root>leaves. At the highest dose (0.5 mg L − 1) the As concentration in the bean fruit and lettuce leaves was 22.1 μg kg − 1 and 1207.5 μg kg − 1 DW, respectively. Increasing As concentration in the irrigation water resulted in decreased edible biomass production in bean, while in lettuce the edible biomass production increased. Neither plant exhibited any visible toxicity symptoms. No significant change was observed in the macro and microelements concentration. The total and the water-soluble arsenic in soil amounted to 3.5 mg kg − 1 and 0.023 mg kg − 1 , respectively. The transfer factor was found to increase with increase in the As treatment applied. The transfer factor range for bean from root to fruit was 0.003-0.005, and for lettuce from root to leaves was 0.14-0.24. Conclusion: Considering the FAO-WHO recommended maximum tolerable daily intake (MTDI) limit of 2.1 μg kg − 1 body weight, and the biomass production, both plants should not be cultivated at As treatment level higher than 0.1 mg L − 1. Keywords: Arsenic/irrigation water/ uptake/ transfer factor/calcareous sandy soil/vegetables contamination of the groundwater and soil is a major environmental toxicity issue, especially in Southeast Asia and in countries like China,

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Section: Arsenic Concentration In the Plant Parts And Transfer Factorsupporting

confidence: 70%

Effect of irrigation water containing arsenic on elemental composition of bean and lettuce plants cultivated in calcareous sandy soil

Sandil

Dobosy

Kröpfl

et al. 2019

Food Prod Process and Nutr

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“…Markers for As toxicity (Isayenko & Maathuis, 2008;Lindsay & Maathuis, 2017;Remy et al, 2012;Song et al, 2010) such as the phosphate transporter AtPHT1;9, boric acid transporter of the aquaporin family (AtNIP7;1), and the multidrug resistance protein AtABCC1 showed a trend towards increased expression in roots of As-treated plants and also under Hpx and under combined stresses (Figure 2c).…”

Section: Transcript Response Of Stress Marker Genesmentioning

confidence: 99%

“…Oxygen availability further deteriorates upon flooding and in compact soils. Hpx generates an energy crisis in plant cells and also inhibits other oxygen-dependent biochemical processes (Bailey-Serres & Voesenek, 2010;Lindsay & Maathuis, 2017). Low oxygen constraints plant growth and leads to losses of crop yield.…”

Section: Introductionmentioning

confidence: 99%

Interference between arsenic‐induced toxicity and hypoxia

Kumar

Vogelsang

Seidel

et al. 2018

Plant Cell & Environment

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Plants often face combinatorial stresses in their natural environment. Here, arsenic (As) toxicity was combined with hypoxia (Hpx) in the roots of Arabidopsis thaliana as it often occurs in nature. Arsenic inhibited growth of both roots and leaves, whereas root growth almost entirely ceased in Hpx. Growth efficiently resumed, and Hpx marker transcripts decreased upon reaeration. Compromised recovery from HpxAs treatment following reaeration indicated some persistent effects of combined stresses despite lower As accumulation. Root glutathione redox potential turned more oxidized in Hpx and most strongly in HpxAs. The more oxidizing root cell redox potential and the lowered glutathione amounts may be conducive to the growth arrest of plants exposed to HpxAs. The stresses elicited changes in elemental and transcriptomic composition. Thus, calcium, magnesium, and phosphorous amounts decreased in rosettes, but the strongest decline was seen for potassium. The reorganized potassium-related transcriptome supports the conclusion that disturbed potassium homeostasis contributes to the growth phenotype. In a converse manner, photosynthesis-related parameters were hardly affected, whereas accumulated carbohydrates under all stresses and anthocyanins under Hpx exclude carbohydrate limitation. The study demonstrates the existence of both synergistic since mutually aggravating effects and antagonistic effects of single and combined stresses.

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“…Substantial progress has been made in understanding how rice plants take up As from the soil and transport it to the aboveground tissues (Zhao et al, 2010b;Lindsay & Maathuis, 2017). Arsenite [As(III)] is usually the predominant form of As in anaerobic paddy soils, although arsenate [As(V)] and methylated As species can also account for significant proportions of the total soluble As in some paddy soils (Khan et al, 2010;Zhao et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Several strategies have been proposed to limit As accumulation in rice, ranging from soil and paddy water management, fertilizer applications and cultivar selection to biotechnological approaches (Zhao et al, 2010b;Lindsay & Maathuis, 2017). Genetic variation among rice cultivars in As accumulation has been reported (Norton et al, 2012;Pinson et al, 2015;Duan et al, 2017), but the underlying mechanisms remain unknown.…”

Section: Introductionmentioning

confidence: 99%

Decreasing arsenic accumulation in rice by overexpressing OsNIP1;1 and OsNIP3;3 through disrupting arsenite radial transport in roots

et al. 2018

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Rice is a major dietary source of the toxic metalloid arsenic. Reducing arsenic accumulation in rice grain is important for food safety. We generated transgenic rice overexpressing two aquaporin genes, OsNIP1;1 and OsNIP3;3, under the control of a maize ubiquitin promoter or the rice OsLsi1 promoter, and tested the effect on arsenite uptake and translocation. OsNIP1;1 and OsNIP3;3 were highly permeable to arsenite in Xenopus oocyte assays. Both transporters were localized at the plasma membrane. Knockout of either gene had little effect on arsenite uptake or translocation. Overexpression of OsNIP1;1 or OsNIP3;3 in rice did not affect arsenite uptake but decreased root-to-shoot translocation of arsenite and shoot arsenic concentration markedly. The overexpressed OsNIP1;1 and OsNIP3;3 proteins were localized in all root cells without polarity. Expression of OsNIP1;1 driven by the OsLsi1 promoter produced similar effects. When grown in two arsenic-contaminated paddy soils, overexpressing lines contained significantly lower arsenic concentration in rice grain than the wild-type without compromising plant growth or the accumulation of essential nutrients. Overexpression of OsNIP1;1 or OsNIP3;3 provides a route for arsenite to leak out of the stele, thus restricting arsenite loading into the xylem. This strategy is effective in reducing arsenic accumulation in rice grain.

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New Molecular Mechanisms to Reduce Arsenic in Crops

Cited by 90 publications

References 60 publications

Effect of irrigation water containing arsenic on elemental composition of bean and lettuce plants cultivated in calcareous sandy soil

Effect of irrigation water containing arsenic on elemental composition of bean and lettuce plants cultivated in calcareous sandy soil

Interference between arsenic‐induced toxicity and hypoxia

Decreasing arsenic accumulation in rice by overexpressing OsNIP1;1 and OsNIP3;3 through disrupting arsenite radial transport in roots

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