Cited by 192Heavy metals in environmentHeavy Metals in PlantsHeavy Metal Pollution Remediation

Physiological and molecular mechanisms of metal accumulation in hyperaccumulator plants

Sytar, Oksana, Ghosh, Supriya, Malinska, Hana, Zivcak, Marek, Brestic, Marian·2020·Physiologia Plantarum

Abstract

Most of the heavy metals (HMs), and metals/metalloids are released into the nature either by natural phenomenon or anthropogenic activities. Being sessile organisms, plants are constantly exposed to HMs in the environment. The metal non-hyperaccumulating plants are susceptible to excess metal concentrations. They tend to sequester metals in their root vacuoles by forming complexes with metal ligands, as a detoxification strategy. In contrast, the metal-hyperaccumulating plants have adaptive intrinsic regulatory mechanisms to hyperaccumulate or sequester excess amounts of HMs into their above-ground tissues rather than accumulating them in roots. They have unique abilities to successfully carry out normal physiological functions without showing any visible stress symptoms unlike metal non-hyperaccumulators. The unique abilities of accumulating excess metals in hyperaccumulators partly owes to constitutive overexpression of metal transporters and ability to quickly translocate HMs from root to shoot. Various metal ligands also play key roles in metal hyperaccumulating plants. These metal hyperaccumulating plants can be used in metal contaminated sites to clean-up soils. Exploiting the knowledge of natural populations of metal hyperaccumulators complemented with cutting-edge biotechnological tools can be useful in the future. The present review highlights the recent developments in physiological and molecular mechanisms of metal accumulation of hyperaccumulator plants in the lights of metal ligands and transporters. The contrasting mechanisms of metal accumulation between hyperaccumulators and non-hyperaccumulators are thoroughly compared. Moreover, uses of different metal hyperaccumulators for phytoremediation purposes are also discussed in detail.

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Crossref · 10.1111/ppl.13285

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Authors
Sytar, O., Ghosh, S., Malinska, H., Zivcak, M., & Brestic, M.
Affiliations
  • Slovak University of Agriculture in Nitra (SK)
  • University of Kalyani (IN)
  • Department of Biology Jan Evangelista Purkyne University Usti nad Labem Czech Republic
  • Department of Plant Physiology Slovak University of Agriculture Nitra Slovakia
Corresponding author
Sytar, Oksana
Venue
Physiologia Plantarum
Publisher
Wiley
Published
2020-11-30
Volume
173
Issue
1
Pages
148-166
ISSN
  • 0031-9317 (ISSN-L)
  • 1399-3054
OpenAlex
W3102756167
Cited by
192
References
278
Citations by year
2026: 11 · 2025: 40 · 2024: 55 · 2023: 38 · 2022: 29 · 2021: 18 · 2020: 1
FWCI
0.96
Type
journal article
Language
en
Open access
closed
Locations
  • Physiologia Plantarum (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
  • Physical Sciences › Chemistry › Analytical Chemistry › Heavy Metals in Plants
  • Physical Sciences › Environmental Science › Water Science and Technology › Heavy Metal Pollution Remediation
Keywords
metal hyperaccumulator plants, heavy metal accumulation, metal transporters, metal-binding ligands, metal detoxification, phytoremediation, metal-contaminated soil remediation
MeSH terms
Biodegradation, Environmental, Plants, Soil Pollutants, Vacuoles, Metals, Heavy

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