Phytoremediation capacity of aquatic plants is associated with the degree of phytochelatin polymerization

Török, Anamaria Iulia; Gulyás, Zsolt; Szalai, Gabriella; Kocsy, Gábor; Majdik, Cornelia

doi:10.1016/j.jhazmat.2015.06.042

Cited by 60 publications

(21 citation statements)

References 38 publications

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“…Cd tolerance in wheat genotypes [3] and for higher Cu, Zn and Cd tolerance in aquatic plants [4]. The overexpression of phytochelatin synthase (AtPCS) in rice also resulted in Cd tolerance [5], while exogenous GSH has been reported to increase photosynthetic performance under Cd stress in rice [6].…”

Section: Introductionmentioning

confidence: 99%

Polyamines may influence phytochelatin synthesis during Cd stress in rice

Pál

Csávás

Szalai

et al. 2017

Journal of Hazardous Materials

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Highlights Putrescine pre-treatment increased cadmium toxicity in rice.  In contrast, putrescine synthesis inhibition alleviated cadmium stress.  The synthesis of higher polyamines and phytochelatins is antagonistically related.  Putrescine may decrease phytochelatin synthesis at enzymatic and gene expression levels. Although the metabolism of phytochelatins and higher polyamines are linked with each other, the direct relationship between them under heavy metal stress has not yet been clarified. Two approaches were used to reveal the influence of polyamine content on cadmium stress responses, particularly with regard to phytochelatin synthesis: putrescine pre-treatment of rice 2 plants followed by cadmium stress, and treatment with the putrescine synthesis inhibitor, 2-(difluoromethyl)ornithine combined with cadmium treatment. The results indicated that putrescine pre-treatment enhanced the adverse effect of cadmium, while the application of 2-(difluoromethyl)ornithine reduced it to a certain extent. These differences were associated with increased polyamine content, more intensive polyamine metabolism, but decreased thiol and phytochelatin contents. The gene expression level and enzyme activity of phytochelatin synthase also decreased in rice treated with putrescine prior to cadmium stress, compared to cadmium treatment alone. In contrast, the inhibition of putrescine synthesis during cadmium treatment resulted in higher gene expression level of phytochelatin synthase. The results suggest that polyamines may have a substantial influence on phytochelatin synthesis at several levels under cadmium stress in rice. Abstract

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Section: Introductionmentioning

confidence: 99%

Polyamines may influence phytochelatin synthesis during Cd stress in rice

Pál

Csávás

Szalai

et al. 2017

Journal of Hazardous Materials

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“…This high sorption potential also accounts for the dominance of A. decurrens, consequently taking up more minerals and water than native flora. The high metal uptake and bioaccumulation may be due to the metal chelating bioactive principles, as reported by Török et al (2015) in their study on phytoremediation capacity of aquatic plants associated with phyto-chelation.…”

Section: Elemental Composition Of a Decurrens Stems Barkmentioning

confidence: 77%

South African Invasive Tree: Studies of the Chemical and Biological Profiles of Acacia Decurrens (Wild)

Okoli¹,

Jummai²,

Molefe³

et al. 2018

IJC

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In this study, we aimed to profile the stem bark of Acacia decurrens biochemically. Extracts obtained by maceration were phytochemically screened, spectroscopically analysed with the aid of UV-visible, FT-IR, GC-MS, and, ICP-OES and subjected to primary biological assay. Spectra obtained from the UV-visible and FT-IR confirm the presence of n ® p* which are characteristic of compounds with oxygenated backbones such as the glycoside, phenols, terpenoids, tannins, and flavonoids. On further analysis, the chromatogram revealed the presence of thirty-five major compounds of which eight bioactive compounds had previously been isolated. The metal profile of the stem bark registered high concentrations of Cr, K, and Fe. Quantitative phytochemical evaluation showed, large amount of tannins (30.87 – 55. 81 mgTAE/g), steroids (13.92-41.2%), and phenols (40.6 - 65.5 mgGAE/g) in all fractions. The ethyl acetate and methanol fractions were found to be rich sources of antibacterial compounds with MIC value of 12.5 μg/mL while the chloroform fraction is a potent antioxidant fraction with IC50 values of 37.00 ± 0.06 g/mL and 42.20 ± 0.72 µg/mL against DPPH and ABTS radicals, respectively. The presence of these secondary metabolites and the hyper-tolerance capacity for metals can be exploited pharmaceutically and for phytoremediation purpose, respectively.

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“…Phytochelatins can form mercaptide bonds with various metals and play an important role in their detoxification in plants (Shukla et al, 2013). Generally, the formation of PC-metal complex takes place in cytosol, which is then sequestrated in the vacuole Török et al, 2015), thereby reducing the concentration of ROS in the cytosol. The induction of phytochelatin synthase (PCS) genes in plants has shown enhanced heavy metal(loid) stress tolerance by regulating PCs production (Eapen and D'Souza, 2005;Zhang et al, 2013).…”

Section: Phytoremediationmentioning

confidence: 99%

A comparison of technologies for remediation of heavy metal contaminated soils

Khalid

Shahid

Niazi

et al. 2017

Journal of Geochemical Exploration

950

349

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, et al.. A comparison of technologies for remediation of heavy metal contaminated soils. Journal of Geochemical Exploration, Elsevier, 2016Elsevier, , 182, pp.247 -268. 10.1016Elsevier, /j.gexplo.2016 Any correspondence concerning this service should be sent to the repository administrator: staff-oatao@listes-diff.inp-toulouse.fr a b s t r a c tSoil contamination with persistent and potentially (eco)toxic heavy metal(loid)s is ubiquitous around the globe. Concentration of these heavy metal(loid)s in soil has increased drastically over the last three decades, thus posing risk to the environment and human health. Some technologies have long been in use to remediate the hazardous heavy metal(loid)s. Conventional remediation methods for heavy metal(loid)s are generally based on physical, chemical and biological approaches, which may be used in combination with one another to clean-up heavy metal(loid) contaminated soils to an acceptable and safe level. This review summarizes the soil contamination by heavy metal(loid)s at a global scale, accumulation of heavy metal(loid)s in vegetables to toxic levels and their regulatory guidelines in soil. In this review, we also elucidate and compare the pool of available technologies that are currently being applied for remediation of heavy metal(loid) contaminated soils, as well as the economic aspect of soil remediation for different techniques. This review article includes an assessment of the contemporary status of technology deployment and recommendations for future remediation research. Finally, the molecular and genetic basis of heavy metal(loid) (hyper)accumulation and tolerance in microbes and plants is also discussed. It is proposed that for effective and economic remediation of soil, a better understanding of remediation procedures and the various options available at the different stages of remediation is highly necessary.

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Phytoremediation capacity of aquatic plants is associated with the degree of phytochelatin polymerization

Cited by 60 publications

References 38 publications

Polyamines may influence phytochelatin synthesis during Cd stress in rice

Polyamines may influence phytochelatin synthesis during Cd stress in rice

South African Invasive Tree: Studies of the Chemical and Biological Profiles of Acacia Decurrens (Wild)

A comparison of technologies for remediation of heavy metal contaminated soils

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