Evolutionary aspects of elemental hyperaccumulation

Cappa, Jennifer J.; Pilon-Smits, Elizabeth A. H.

doi:10.1007/s00425-013-1983-0

Cited by 167 publications

(115 citation statements)

References 73 publications

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“…Root growth is inhibited during Cd exposure due to the oxidative stress that compromises the development of the root apex (Xiong et al 2009). Cadmium enters roots through membrane transporters for micronutrients such as Fe and Mn (Lux et al 2011;Cappa and Pilon-Smits 2014). This postulates that a competition in uptake of Mn or Fe with Cd exists in plants.…”

Section: Introductionmentioning

confidence: 98%

Iron- and manganese-assisted cadmium tolerance in Oryza sativa L.: lowering of rhizotoxicity next to functional photosynthesis

Sebastian

Prasad

2015

Planta

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Cadmium toxicity is alleviated by iron and manganese supplements because of reduction in cadmium accumulation and upholding of redox regulation that prevent cadmium-inducible damage to root growth and photosynthesis. Cadmium toxicity in Oryza sativa L. MTU 7029 was investigated in the presence of different concentrations of the micronutrients Fe and Mn. It had been observed that these micronutrients reduce Cd uptake and minimize Cd-inducible rhizotoxicity. The photosynthetic electron transport chain, which is the hub of Fe containing metalloproteins, was severely affected by Cd and resulted in reduced bioproductivity under Cd stress. However, exogenous Fe restored the photosynthetic electron transport. Thus, due to the maintenance of the photosynthetic electron transport, the Cd tolerance was improved during Fe supplement. Both antioxidant enzymes and non-enzymatic antioxidant metabolites were found to play important roles in the alleviation of Cd stress under Fe or Mn supplement. It is concluded that the presence of excess Fe and Mn protects rice plants from Cd stress.

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Section: Introductionmentioning

confidence: 98%

Iron- and manganese-assisted cadmium tolerance in Oryza sativa L.: lowering of rhizotoxicity next to functional photosynthesis

Sebastian

Prasad

2015

Planta

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“…According to Van der Ent et al (2013), the minimum concentrations of elements in dry foliage of hyperaccumulators growing in their natural habitats are: 10,000 lg/g for Mn; 3,000 lg/g for Zn; 1,000 lg/g for As, Ni and Pb; 300 lg/g for Co, Cr and Cu; and 100 lg/g for Cd, Se and Tl. The threshold criteria for other elements have not been set, but it has been recommended that hyperaccumulator status can be established if the foliar element concentrations are 50-100 or 100-1,000 times higher than those in plants growing on normal soils (Van der Ent et al 2013;Cappa and Pilon-Smits 2014). Thus, to confirm the hyperaccumulator status, the typical foliar concentrations should be considered.…”

Section: Evaluation Of Typical Element Concentrations In Plantsmentioning

confidence: 99%

A new two-step screening method for prospecting of trace element accumulating plants

Gałuszka

Krzciuk

Migaszewski

2014

Int. J. Environ. Sci. Technol.

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A vulnerable point of the currently used approach to the search for the new species capable of abnormal accumulation (hyperaccumulation) of trace elements is that most studies have been conducted in laboratory conditions and focused on the determination of a limited number of elements. We propose a methodology that enables screening for multi-element accumulating plants. This methodology is based on two analytical steps: a semiquantitative analysis mode by ICP-MS that allows selection of plant samples which are enriched in one or more trace elements, and a quantitative analysis necessary for confirmation of the results derived from the first step. The proposed methodology was tested in the study of 30 plant samples. Ten elements with the highest concentrations obtained in the semiquantitative analyses were determined quantitatively with the following detection limits (in mg/kg): 0.001 for Ag, 0.08 for Ba, 0.002 for Cd, 0.005 for Co, 0.01 for Cr, 0.003 for Cu, 1.4 for Fe, 0.012 for Mn, 0.03 for Ni, 0.006 for Pb, 0.001 for Sc, 0.001 for Tl and 0.06 for Zn. The CRM recovery values obtained were in the range of 80-103 %, and the precision of the measurements (as RSD) was in the range of 0.34-4.05 %. We also propose a simple method for evaluation of typical element concentrations in plants collected for analyses. Our approach provides a novel screening method for both identification of new hyperaccumulators and for studying a larger number of elements accumulated by plants. This method may find its application in environmental biotechnology.

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“…to most organisms and can have toxic effects at relatively low concentrations in nearly all plants and animals (He et al 2005;Cappa and Pilon-Smits 2014). Thus, an accumulation of excess heavy metals, defined as any metal of environmental concern including As, Cu, Cd, Pb, and Zn, in soils can become toxic to plants and contaminate the food chain (McLaughlin et al 1999;He et al 2005;Clemens 2006;Verbruggen et al 2009).…”

mentioning

confidence: 97%

“…Thus, an accumulation of excess heavy metals, defined as any metal of environmental concern including As, Cu, Cd, Pb, and Zn, in soils can become toxic to plants and contaminate the food chain (McLaughlin et al 1999;He et al 2005;Clemens 2006;Verbruggen et al 2009). However, plants have evolved various mechanisms to assimilate essential trace metals from the soil and cope with excess trace elements by exclusion, elimination, or sequestration (White and Broadley 2005;Clemens 2006; White and Brown 2010;Baxter and Dilkes 2012;Cappa and Pilon-Smits 2014). Although some plants can assimilate and sequester high concentrations of heavy metals (Maestri and Marmiroli 2012;Cappa and Pilon-Smits 2014) it is also important to consider that some livestock and wildlife species are sensitive to As, Cd, Cu, Mo, and Pb at very low concentrations (5-30 mg·kg −1 ) in plant forages (National Research Council 2005;Kabata-Pendias 2011).…”

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confidence: 99%

Quantitative trait loci (QTL) and candidate genes associated with trace element concentrations in perennial grasses grown on phytotoxic soil contaminated with heavy metals

et al. 2015

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Background and aims Native grasses planted or growing on sites contaminated by heavy metals should be safe for livestock and wildlife. Plant breeders seek to identify genes and quantitative trait loci (QTLs) controlling trace element variation among these grasses. Methods QTLs controlling forage mineral concentrations were mapped in a population derived from two perennial wildrye species, Leymus cinereus and Leymus triticoides, grown in soil contaminated with arsenic, cadmium, copper, lead, zinc, and other trace elements. These QTLs were aligned to the genome sequence of barley (Hordeum vulgare) for comparison to genes or QTLs controlling trace element uptake in other species and soils, including perennial wildrye grown in fertile soil.Results A total of 25 QTLs for 14 elements were detected on contaminated soil. Three of four zinc QTLs were conserved between fertile and contaminated soils, but no other QTLs were conserved across these test soils. Two homoeologous molybdenum QTLs were closely associated with MOT1 orthogenes, which encode one of two known molybdate transporters in plants, and possible candidate gene associations were identified for other heavy metal QTLs. Conclusions Results elucidate conserved and unparalleled mechanisms controlling trace element variation among different plants and soils, showing opportunities and challenges in plant breeding.Each year, millions of tonnes of new trace metals including arsenic (As), cadmium (Cd), copper (Cu), manganese (Mn), molybdenum (Mo), lead (Pb), and zinc (Zn) are produced by mines and mobilized into the biosphere (Nriagu and Pacyna 1988;Moore and Luoma 1990). Humans, plants and animals require Cu, Mo, Mn, Zn and other trace elements including iron (Fe) and magnesium (Mg) as essential micronutrients, but these metals can be toxic to most plants and animals at higher concentrations (Welch 1995;Corah 1996;Grusak and DellaPenna 1999;He et al. 2005; White and Broadley 2005; White and Brown 2010). Other trace metals including As, Cd, and Pb are not essential Plant Soil

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Evolutionary aspects of elemental hyperaccumulation

Abstract: conclude the review with a summary and suggested future directions for hyperaccumulator research.

Cited by 167 publications

References 73 publications

Iron- and manganese-assisted cadmium tolerance in Oryza sativa L.: lowering of rhizotoxicity next to functional photosynthesis

Iron- and manganese-assisted cadmium tolerance in Oryza sativa L.: lowering of rhizotoxicity next to functional photosynthesis

A new two-step screening method for prospecting of trace element accumulating plants

Quantitative trait loci (QTL) and candidate genes associated with trace element concentrations in perennial grasses grown on phytotoxic soil contaminated with heavy metals

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