Cited by 278Plant Micronutrient Interactions and EffectsHeavy metals in environmentHeavy Metals in Plants

Uptake and transport of zinc in the hyperaccumulator Thlaspi caerulescens and the non‐hyperaccumulator Thlaspi ochroleucum

SHEN, Z. G., ZHAO, F. J., McGRATH, S. P.·1997·Plant, Cell & Environment

Abstract

ABSTRACT Growth and zinc uptake of the hyperaccumulator species Thlaspi caerulescens J. & C. Presl and the non‐hyperaccumulator species Thlaspi ochroleucum Boiss. & Heldr. were compared in solution culture experiments. T. caerulescens was able to tolerate 500 mmol m−3 (32.5 g m−3) Zn in solution without growth reduction, and up to 1000 mmol m−3 (65 g m−3) Zn without showing visible toxic symptoms but with a 25% decrease in dry matter (DM) yield. Up to 28 g kg−1 of Zn in shoot DM was obtained in healthy plants of T. caerulescens. In contrast, T. ochroleucum suffered severe phytotoxicity at 500 mmol m−3 Zn. Marked differences were shown in Zn uptake, distribution and redistribution between the two species. T. caerulescens had much higher concentrations of Zn in the shoots, whereas T. ochroleucum accumulated higher concentrations of Zn in the roots. When an external supply of 500 mmol m−3 Zn was withheld, 89% of the Zn accumulated previously in the roots of T. caerulescens was transported to the shoots over a 33 d period, whereas in T. ochroleucum only 32% was transported. T. caerulescens was shown to have a greater internal requirement for Zn than other plants. Increasing the supply of Zn from 1 to 10 mmol m−3 gave a 19% increase in the total DM of this species. liven the shoots from the 1 mmol m−3 Zn treatment which showed Zn deficiency contained 10 times greater Zn concentrations than the widely reported critical value for Zn deficiency to occur in many other plant species. The results obtained suggest that strongly expressed constitutive sequestration mechanisms exist in the hyperaccumulator T. caerulescens, which detoxify the large amount of Zn present in shoot tissues and decrease its physiological availability in the cytosol. Both T. caerulescens and T. ochroleucum had constitutively high concentrations of malate in shoots, which were little affected by different Zn treatments. Although malate may play a role in Zn chelation because of the high concentrations present, it cannot explain the species specificity of Zn tolerance and hyperaccumulation.

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Crossref · 10.1046/j.1365-3040.1997.d01-134.x

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  • Few populations of N. caerulescens show minor symptoms upon accumulating Cd up to 4000 mg kg-1 dry weight and 30,000-40,000 mg kg-1 dry weight of Zn.

    “Few populations of N. caerulescens show minor symptoms upon accumulating Cd up to 4000 mg kg-1 dry weight and 30,000–40,000 mg kg-1 dry weight of Zn (Shen et al., 1997; Ebbs et al., 2002; Natasha et al., 2022).”

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Authors
SHEN, Z. G., ZHAO, F. J., & McGRATH, S. P.
Affiliations
  • Nanjing Agricultural University (CN)
  • Rothamsted Research (GB)
Corresponding author
McGRATH, S. P.
Venue
Plant, Cell & Environment
Publisher
Wiley
Published
1997-07
Volume
20
Issue
7
Pages
898-906
ISSN
  • 0140-7791 (ISSN-L)
  • 1365-3040
OpenAlex
W2115910072
Cited by
278
References
29
Citations by year
2026: 2 · 2025: 6 · 2024: 5 · 2023: 2 · 2022: 6 · 2021: 4 · 2020: 17 · 2019: 11 · 2018: 7 · 2017: 5 · 2016: 11 · 2015: 10 · 2014: 10 · 2013: 11 · 2012: 15
FWCI
8.15
Type
journal article
Language
en
Open access
closed
Locations
  • Plant Cell & Environment (publishedVersion)
  • Rothamsted Repository (Rothamsted Repository) (submittedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Micronutrient Interactions and Effects
  • Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
  • Physical Sciences › Chemistry › Analytical Chemistry › Heavy Metals in Plants
Keywords
Thlaspi caerulescens, zinc hyperaccumulation, zinc uptake, zinc transport, phytotoxicity, zinc deficiency, zinc sequestration, malate, zinc chelation, metal hyperaccumulator plants, dry matter yield

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