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Antioxidative and Chelating Molecules of Plants under the Excess of Metals

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 4135

Special Issue Editor


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Guest Editor
Department of Biology, Faculty of Education, University of Trnava, Priemyselna 4, 918 43 Trnava, Slovakia
Interests: plant physiology/biochemistry; secondary/phenolic metabolism; abiotic stress; oxidative stress; (heavy) metals; mineral nutrition
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Special Issue Information

Dear Colleagues,

Common plant metabolites with antioxidative and/or metal chelating ability (such as vitamins C and E, thiols, organic acids, proline, and many else) are crucial in mediating the adaptation of plants to changing environments, including the excess of metals. Their exogenous application or genetic manipulation often ameliorates the negative effect of metals and modulates the yield of plants. On the other hand, some of these metabolites support the uptake of metals in (hyper)accumulator species, providing a tool for increased phytoremediation. In addition to toxic metals, essential plant metallic nutrients or beneficial elements may stimulate the accumulation of antioxidative molecules in plants, leading to products with higher health benefits. These interactions may positively affect the quality of crops and medicinal plants. Both laboratory and field studies focused on the interaction between antioxidants and metals (and vice versa) and subsequent molecular mechanisms in plants are welcomed.

Dr. Jozef Kovacik
Guest Editor

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Keywords

  • ascorbic acid
  • food safety
  • glutathione
  • (heavy) metals
  • Krebs acids
  • phytoremediation
  • proline
  • thiols

Published Papers (1 paper)

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Review

24 pages, 2146 KiB  
Review
Increasing Heavy Metal Tolerance by the Exogenous Application of Organic Acids
by Andrea Vega, Ninoska Delgado and Michael Handford
Int. J. Mol. Sci. 2022, 23(10), 5438; https://doi.org/10.3390/ijms23105438 - 13 May 2022
Cited by 29 | Viewed by 3096
Abstract
Several metals belong to a group of non-biodegradable inorganic constituents that, at low concentrations, play fundamental roles as essential micronutrients for the growth and development of plants. However, in high concentrations they can have toxic and/or mutagenic effects, which can be counteracted by [...] Read more.
Several metals belong to a group of non-biodegradable inorganic constituents that, at low concentrations, play fundamental roles as essential micronutrients for the growth and development of plants. However, in high concentrations they can have toxic and/or mutagenic effects, which can be counteracted by natural chemical compounds called chelators. Chelators have a diversity of chemical structures; many are organic acids, including carboxylic acids and cyclic phenolic acids. The exogenous application of such compounds is a non-genetic approach, which is proving to be a successful strategy to reduce damage caused by heavy metal toxicity. In this review, we will present the latest literature on the exogenous addition of both carboxylic acids, including the Kreb’s Cycle intermediates citric and malic acid, as well as oxalic acid, lipoic acid, and phenolic acids (gallic and caffeic acid). The use of two non-traditional organic acids, the phytohormones jasmonic and salicylic acids, is also discussed. We place particular emphasis on physiological and molecular responses, and their impact in increasing heavy metal tolerance, especially in crop species. Full article
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