Heavy metal phytoremediation from a meta-analytical perspective

Audet, Patrick; Charest, Christiane

doi:10.1016/j.envpol.2006.08.011

Cited by 147 publications

(77 citation statements)

References 38 publications

(13 reference statements)

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“…Enrichment occurs when heavy metal is taken up by a plant, resulting in an accumulation in the plant. BCF values higher than 1 are indicative of potential hyperaccumulator species (Audet and Charest, 2007). All the BCF were more than 10 and these high BCF values could be attributed mainly to the metal accumulated in the roots several-fold higher than that in the shoots.…”

Section: Discussionmentioning

confidence: 90%

Lead accumulation and tolerance of Moso bamboo (Phyllostachys pubescens) seedlings: applications of phytoremediation

Liú

Islam

et al. 2015

J. Zhejiang Univ. Sci. B

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A hydroponics experiment was aimed at identifying the lead (Pb) tolerance and phytoremediation potential of Moso bamboo (Phyllostachys pubescens) seedlings grown under different Pb treatments. Experimental results indicated that at the highest Pb concentration (400 μmol/L), the growth of bamboo seedlings was inhibited and Pb concentrations in leaves, stems, and roots reached the maximum of 148.8, 482.2, and 4282.8 mg/kg, respectively. Scanning electron microscopy revealed that the excessive Pb caused decreased stomatal opening, formation of abundant inclusions in roots, and just a few inclusions in stems. The ultrastructural analysis using transmission electron microscopy revealed that the addition of excessive Pb caused abnormally shaped chloroplasts, disappearance of endoplasmic reticulum, shrinkage of nucleus and nucleolus, and loss of thylakoid membranes. Although ultrastructural analysis revealed some internal damage, even the plants exposed to 400 µmol/L Pb survived and no visual Pb toxicity symptoms such as necrosis and chlorosis were observed in these plants. Even at the highest Pb treatment, no significant difference was observed for the dry weight of stem compared with controls. It is suggested that use of Moso bamboo as an experimental material provides a new perspective for remediation of heavy metal contaminated soil owing to its high metal tolerance and greater biomass.

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Section: Discussionmentioning

confidence: 90%

Lead accumulation and tolerance of Moso bamboo (Phyllostachys pubescens) seedlings: applications of phytoremediation

Liú

Islam

et al. 2015

J. Zhejiang Univ. Sci. B

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“…Plant tolerance to heavy metal stress is estimated based on their root and/or shoot growth inhibition by the metal present in a medium (Srinivasan et al, 2014). According to Audet and Charest (2007), if TI values less than 1, this indicates that the plant suffered a stress due to metal pollution with a net decrease in biomass. By contrast, if TI values greater than 1, suggest that plants have developed tolerance with a net increase in biomass (hyper accumulator).…”

Section: Pb-induced Phytotoxic Effectsmentioning

confidence: 99%

Accumulation and distribution of lead (Pb) in plant tissues of guar (Cyamopsis tetragonolobaL.) and sesame (Sesamum indicumL.): profitable phytoremediation with biofuel crops

Amin

Arain

Jahangir

et al. 2018

Geology, Ecology, and Landscapes

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Contamination of lead indicates one of the major threats to soil system. Phytoremediation technique utilized plants which are able to tolerate and accumulate metals within in their tissues. It has recently been suggested that biofuel plants are more suitable for both utilization and remediation of metal contaminated soil. This study reported Pb phytoremediation potential of Cyamopsis tetragonoloba L. in comparison with Sesamum indicum L. in the framework of a pot-experiment. Plants were subjected to seven Pb concentrations (0, 100, 200, 400, 600, 800 and 1000 mg kg -1 soil) for 12 weeks. Our results demonstrated that both C. tetragonoloba and S. indicum were able to tolerate Pb concentrations up to 1000 mg kg -1 which confirms the plant ability to grow well in higher Pb levels. Significant metal accumulation was observed in root along with reduced biomass for both plants species. Furthermore, both plant species could possibly be used for phytostabilization, with success in marginally polluted soils where their growth would not be impaired and decontamination of Pb could be maintained at satisfying levels. However, bioconcentration factor (BCF), bioaccumulation coefficient (BAC) and translocation factor (TF) values proposed that C. tetragonoloba was more efficient for phytoremediation than S. indicum at higher Pb levels.

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“…TF assesses the ability of plants to transfer As from roots to leaves, whereas BCF is the ratio of concentrations in plant tissue to those in the soil [8,26,49]. TF and BCF were calculated as follows: TF = As concentration in leaves (mg kg ).…”

Section: Determinationsmentioning

confidence: 99%

The Arbuscular Mycorrhiza Rhizophagus intraradices Reduces the Negative Effects of Arsenic on Soybean Plants

Spagnoletti

Lavado

2015

Agronomy

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Arsenic (As) in soils causes several detrimental effects, including death. Arsenic toxicity in soybean plants (Glycine max L.) has been little studied. Arbuscular mycorrhiza (AM) increase the tolerance of host plants to abiotic stress, like As. We investigated the effects of AM fungi on soybean grown in As-contaminated soils. A pot experiment was carried out in a glasshouse, at random with five replications. We applied three levels of As (0, 25, and 50 mg As kg −1 ), inoculated and non-inoculated with the AM fungus Rhizophagus intraradices (N.C. Schenck & G.S. Sm.) C. Walker & A. Schüßler. Plant parameters and mycorrhizal colonization were measured. Arsenic in the substrate, roots, and leaves was quantified. Arsenic negatively affected the AM percentage of spore germination and hyphal length. As also affected soybean plants negatively: an extreme treatment caused a reduction of more than 77.47% in aerial biomass, 68.19% in plant height, 78.35% in number of leaves, and 44.96% reduction in root length, and delayed the phenological evolution. Mycorrhizal inoculation improved all of these parameters, and decreased plant As accumulation (from 7.8 mg As kg ). AM inoculation showed potential to reduce As toxicity in contaminated areas. The AM fungi decreased As concentration in plants following different ways: dilution effect, less As intake by roots, and improving soybean tolerance to As.

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Heavy metal phytoremediation from a meta-analytical perspective

Cited by 147 publications

References 38 publications

Lead accumulation and tolerance of Moso bamboo (Phyllostachys pubescens) seedlings: applications of phytoremediation

Lead accumulation and tolerance of Moso bamboo (Phyllostachys pubescens) seedlings: applications of phytoremediation

Accumulation and distribution of lead (Pb) in plant tissues of guar (Cyamopsis tetragonolobaL.) and sesame (Sesamum indicumL.): profitable phytoremediation with biofuel crops

The Arbuscular Mycorrhiza Rhizophagus intraradices Reduces the Negative Effects of Arsenic on Soybean Plants

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