Accumulation of Cu, Pb, Ni and Zn in the halophyte plant <i>Atriplex</i> grown on polluted soil

Kachout, Salma Sai; Mansoura, A. Ben; Mechergui, Rania; Leclerc, J. C.; Rejeb, Mohamed Néjib; Ouerghi, Zeineb

doi:10.1002/jsfa.4581

Cited by 55 publications

(20 citation statements)

References 37 publications

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“…The concentration of Cr in three biochars and two manures ranged from 9.0 to 24.0 mg kg −1 (Table 2), which is higher than the toxic level threshold (5 mg kg −1 ) (Muhammad et al 2012). The concentration of Cu and Zn in cow and chicken manures was 47 and 90 mg kg −1 Cu, 1161 and 1575 mg kg −1 Zn (Table 2), respectively, which is near (>100 mg kg −1 Cu) or above (> 300 mg kg −1 Zn) (Kachout et al 2012;Levy et al 1999) the toxic level thresholds. The high levels of heavy metals in the manures had probably resulted from the use of metal-containing additives in animal feeds.…”

Section: Methodsmentioning

confidence: 87%

Contrasting effects of organic amendments on phytoextraction of heavy metals in a contaminated sediment

et al. 2015

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Background and aims Soil amendments are often added to polluted soils to increase phytoremediation efficiency.Here we investigated the potential of a range of organic amendments for phytoextraction of heavy metals in a contaminated sediment.Methods Two experiments compared adsorption and phytoextraction of heavy metals by a Cdhyperaccumulator Carpobrotus rossii grown in the contaminated sediment amended with six organic amendments. Results The adsorption capacity as measured by Langmuir adsorption maximum followed the order of Cr > Zn > Cu > Cd, and the effect of organic amendments followed the order of chicken manure > cow manure > brown coal > golden wattle biochar > blue gum biochar > radiata pine biochar. The addition of amendments increased the adsorption of heavy metals, with brown coal resulting in the lowest concentrations of water-extractable Cd, Cu and Zn. Two manures resulted in the highest concentrations of these waterextractable heavy metals in the rhizosphere soil of C. rossii. Furthermore, brown coal resulted in higher shoot accumulation of these heavy metals than three wood-derived biochars, whilst the manures generally had the lowest accumulation of Cd and Cu although they increased shoot biomass. Conclusions The addition of brown coal decreased whereas manure addition increased the mobility (water-extractable fraction) of heavy metals in rhizosphere soil. Phytoextraction of Cd and Cu was greater with brown coal than with biochars or manures. Brown coal is suitable for enhancing phytoextraction of these heavy metals because it could increase their accumulation in shoots of C. rossii and decrease the risk of leaching of these heavy metals into groundwater.

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Section: Methodsmentioning

confidence: 87%

Contrasting effects of organic amendments on phytoextraction of heavy metals in a contaminated sediment

et al. 2015

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“…However, only a few salt-tolerance genes have been previously identified, and most of the studies on plant salt tolerance have focused on model plants such as Arabidopsis, rice and tobacco. Research on salt-tolerant genes in halophytes is scarce, even though some euhalophytes have the specific ability to cope with high levels of salinity using unique mechanisms [24]–[30].…”

Section: Introductionmentioning

confidence: 99%

Global Transcriptome Profiling of Salicornia europaea L. Shoots under NaCl Treatment

Zhang

Xiao

et al. 2013

PLoS ONE

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BackgroundSoil salinity is a major abiotic stress that limits agriculture productivity worldwide. Salicornia europaea is well adapted to extreme saline environments with more than 1,000 mM NaCl in the soil, so it could serve as an important model species for studying halophilic mechanisms in euhalophytes. To obtain insights into the molecular basis of salt tolerance, we present here the first extensive transcriptome analysis of this species using the Illumina HiSeq™ 2000.Principal FindingsA total of 41 and 39 million clean reads from the salt-treated (Se200S) and salt-free (SeCKS) tissues of S. europaea shoots were obtained, and de novo assembly produced 97,865 and 101,751 unigenes, respectively. Upon further assembly with EST data from both Se200S and SeCKS, 109,712 high-quality non-redundant unigenes were generated with a mean unigene size of 639 bp. Additionally, a total of 3,979 differentially expressed genes (DEGs) were detected between the Se200S and SeCKS libraries, with 348 unigenes solely expressed in Se200S and 460 unigenes solely expressed in SeCKS. Furthermore, we identified a large number of genes that are involved in ion homeostasis and osmotic adjustment, including cation transporters and proteins for the synthesis of low-molecular compounds. All unigenes were functionally annotated within the COG, GO and KEGG pathways, and 10 genes were validated by qRT-PCR.ConclusionOur data contains the extensive sequencing and gene-annotation analysis of S. europaea. This genetic knowledge will be very useful for future studies on the molecular adaptation to abiotic stress in euhalophytes and will facilitate the genetic manipulation of other economically important crops.

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“…purpurea, var. rubra, do not hyperaccumulate metals in vegetative tissues, but were proficient to bioconcentrate them into underground tissues (Kachout et al 2012). Field experiments with A. halimus in semiarid environments demonstrated its ability for phytostabilization on metal-contaminated soils, through concentration of ions in vegetative tissues (Clemente et al 2012).…”

Section: Salt Phytoremediationmentioning

confidence: 99%

Halophytes

Mushtaq

Bedair

Shakeel

2020

Handbook of Halophytes

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Saline soil is an increasing global problem. Augmented levels of salt content in agricultural soils impart negative influences on germination, plant growth, and reproducibility. It also affects various biological processes, viz., nutrient balance, photosynthesis, respiration, membrane properties, metabolism, cellular homeostasis, enzymatic activity, and hormone regulation. All these changes lead to the assembly of reactive oxygen species (ROS) and in extreme stress plant death. This chapter shows how to face this problem using halophytes. Halophytes have some physiological adaptations which increases their endurance to survive in brine environments. Phytoremediation basically describes a practice where plants

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Accumulation of Cu, Pb, Ni and Zn in the halophyte plant Atriplex grown on polluted soil

Abstract: Among the plants studied, var. purpurea was the most efficient in accumulating Pb and Zn in its shoots, whereas var. rubra was most suitable for phytostabilization of sites contaminated with Cu and Ni.

Cited by 55 publications

References 37 publications

Contrasting effects of organic amendments on phytoextraction of heavy metals in a contaminated sediment

Contrasting effects of organic amendments on phytoextraction of heavy metals in a contaminated sediment

Global Transcriptome Profiling of Salicornia europaea L. Shoots under NaCl Treatment

Halophytes

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