Phytoremediation of Toxic Elements

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant–Soil Interactions".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 5945

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Guest Editor
Department of Chemistry, Faculty of Forestry and Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 75, 60-625 Poznań, Poland
Interests: plant response to heavy metals; phytoremediation; dendroremediation; bioindication; oxidative stress; metal detoxication; secondary metabolism; salicylic acid function in plants
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Department of Genome Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland
Interests: detoxication system; glutathione-phytochelatin system; tolerance mechanisms; oxidative stress; metal detoxication; chelate-assisted phytoextraction; bacteria-assisted phytoextraction
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Post-industrial areas and waste disposal sites pose a serious threat to surrounding ecosystems and local communities. A recent and rapidly developing approach to dealing with metal-contaminated sites that has both environmental and social acceptance is phytoremediation, using plants to prevent the spread of pollution via erosion, runoff, and percolation. Over the last 20 years, a tremendous boost has been observed in all aspects of phytoremediation research. Milestones in this field include mechanisms and rates of metal uptake, metal stabilization or immobilization in the rhizosphere by root exudates and microorganisms, the application of natural or synthetic chelators, short- and long-distance metal transport, and various issues related to metal toxicity such as growth inhibition, chlorosis and decrease in photosynthetic efficiency, metal-induced oxidative and nitro-oxidative stress, tolerance, and detoxication mechanisms. Despite the large load of the rapidly growing information, there are still open questions and challenging issues in this developing field. These include the role of plant microbiome (bacteria, fungi) in metal stabilization and induced resistance in metal-treated plants; the concept of metaorganisms development for phytoremediation success; soil amendment in assisted phytoremediation (e.g., biochar, iron); the impact of water supply, salinity, and mineral nutritional status on metal uptake and toxicity; hormesis effect and cross tolerance; plant growth regulators-assisted phytoremediation; as well as co-cropping and co-planting—all in molecular and metabolic to field aspects.

Thus, in this Special Issue, we welcome the submission of articles (i.e., research articles, reviews, and short communications) that focus on aspects of phytoremediation including physiology, biochemistry, genes, proteins, hormones, regulatory and signaling compounds, primary and secondary metabolites, nutrition, and environment, comprising transcriptome, proteome and metabolome studies, plant microbiome, metals interactions with nutrients in controlled studies, as well as field- and agronomic-scale trials on model plants, crops, trees, grasses, native species, etc.

Dr. Kinga Drzewiecka
Dr. Aneta Piechalak
Guest Editors

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Keywords

  • phytostabilization of metals and metalloids
  • phytoextraction of metals and metalloids
  • phytomining
  • metal/loids uptake and speciation
  • metal/loids toxicity
  • metal avoidance and tolerance mechanisms
  • metal detoxication mechanisms
  • soil microorganisms in phytoremediation
  • assisted phytoremediation
  • metal-induced nitro-oxidative stress
  • disposal of toxic biomass after phytoremediation
  • limitations of phytoremediation
  • future trends in phytoremediation

Published Papers (2 papers)

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Research

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25 pages, 2312 KiB  
Article
The Possibility of Using Paulownia elongata S. Y. Hu × Paulownia fortunei Hybrid for Phytoextraction of Toxic Elements from Post-Industrial Wastes with Biochar
by Kinga Drzewiecka, Monika Gąsecka, Zuzanna Magdziak, Sylwia Budzyńska, Małgorzata Szostek, Przemysław Niedzielski, Anna Budka, Edward Roszyk, Beata Doczekalska, Marta Górska and Mirosław Mleczek
Plants 2021, 10(10), 2049; https://doi.org/10.3390/plants10102049 - 29 Sep 2021
Cited by 7 | Viewed by 2121
Abstract
The potential of the Paulownia hybrid for the uptake and transport of 67 elements along with the physiological response of plants cultivated in highly contaminated post-industrial wastes (flotation tailings—FT, and mining sludge—MS) was investigated. Biochar (BR) was added to substrates to limit metal [...] Read more.
The potential of the Paulownia hybrid for the uptake and transport of 67 elements along with the physiological response of plants cultivated in highly contaminated post-industrial wastes (flotation tailings—FT, and mining sludge—MS) was investigated. Biochar (BR) was added to substrates to limit metal mobility and facilitate plant survival. Paulownia could effectively uptake and translocate B, Ca, K, P, Rb, Re and Ta. Despite severe growth retardation, chlorophyll biosynthesis was not depleted, while an increased carotenoid content was noted for plants cultivated in waste materials. In Paulownia leaves and roots hydroxybenzoic acids (C6-C1) were dominant phenolics, and hydroxycinnamic acids/phenylpropanoids (C6-C3) and flavonoids (C6-C3-C6) were also detected. Plant cultivation in wastes resulted in quantitative changes in the phenolic fraction, and a significant drop or total inhibition of particular phenolics. Cultivation in waste materials resulted in increased biosynthesis of malic and succinic acids in the roots of FT-cultivated plants, and malic and acetic acids in the case of MS/BR substrate. The obtained results indicate that the addition of biochar can support the adaptation of Paulownia seedlings growing on MS, however, in order to limit unfavorable changes in the plant, an optimal addition of waste is necessary. Full article
(This article belongs to the Special Issue Phytoremediation of Toxic Elements)
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Review

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25 pages, 925 KiB  
Review
Brassica Species in Phytoextractions: Real Potentials and Challenges
by Tijana Zeremski, Dragana Ranđelović, Ksenija Jakovljević, Ana Marjanović Jeromela and Stanko Milić
Plants 2021, 10(11), 2340; https://doi.org/10.3390/plants10112340 - 29 Oct 2021
Cited by 21 | Viewed by 3015
Abstract
The genus Brassica is recognized for including species with phytoaccumulation potential and a large amount of research has been carried out in this area under a variety of conditions, from laboratory experiments to field trials, with spiked or naturally contaminated soils, using one- [...] Read more.
The genus Brassica is recognized for including species with phytoaccumulation potential and a large amount of research has been carried out in this area under a variety of conditions, from laboratory experiments to field trials, with spiked or naturally contaminated soils, using one- or multi-element contaminated soil, generating various and sometimes contradictory results with limited practical applications. To date, the actual field potential of Brassica species and the feasibility of a complete phytoextraction process have not been fully evaluated. Therefore, the aim of this study was to summarize the results of the experiments that have been performed with a view to analyzing real potentials and limitations. The reduced biomass and low metal mobility in the soil have been addressed by the development of chemically or biologically assisted phytoremediation technologies, the use of soil amendments, and the application of crop management strategies. Certain issues, such as the fate of harvested biomass or the performance of species in multi-metal-contaminated soils, remain to be solved by future research. Potential improvements to current experimental settings include testing species grown to full maturity, using a greater amount of soil in experiments, conducting more trials under real field conditions, developing improved crop management systems, and optimizing solutions for harvested biomass disposal. Full article
(This article belongs to the Special Issue Phytoremediation of Toxic Elements)
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