Symplasmic and transmembrane zinc transport is modulated by cadmium in the Cd/Zn hyperaccumulator Sedum alfredii
Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved..
This study investigated the influence of Cd (25 µM) on Zn accumulation in a hyperaccumulating (HE) and a non-hyperaccumulating (NHE) ecotype of Sedum alfredii Hance at short-term supply of replete (Zn5, 5 µM) and excess (Zn400, 400 µM) Zn. Cd inhibited Zn accumulation in both ecotypes, especially under Zn400, in organs with active metal sequestration, i.e. roots of NHE and shoots of HE. Direct biochemical Cd/Zn competition at the metal-protein interaction and changes in transporter gene expression contributed to the observed accumulation patterns in the roots. Specifically, in HE, Cd stimulated SaZIP4 and SaPCR2 under Zn5, but downregulated SaIRT1 and SaZIP4 under Zn400. However, Cd downregulated related transporter genes, except for SaNRAMP1, in NHE, irrespective of Zn. Cadmium stimulated casparian strip (CSs) development in NHE, as part of the defense response, while it had a subtle effect on the (CS) in HE. Moreover, Cd delayed the initiation of the suberin lamellae (SL) in HE, but stimulated SL deposition in NHE under both Zn5 or Zn400. Changes in suberization were mainly ascribed to suberin-biosynthesis-related genes and hormonal signaling. Altogether, Cd regulated Zn accumulation mainly via symplasmic and transmembrane transport in HE, while Cd inhibited both symplasmic and apoplasmic Zn transport in NHE.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:275 |
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| Enthalten in: |
Ecotoxicology and environmental safety - 275(2024) vom: 15. Apr., Seite 116272 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Cao, Ke [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 12.04.2024 Date Revised 12.04.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.ecoenv.2024.116272 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a This study investigated the influence of Cd (25 µM) on Zn accumulation in a hyperaccumulating (HE) and a non-hyperaccumulating (NHE) ecotype of Sedum alfredii Hance at short-term supply of replete (Zn5, 5 µM) and excess (Zn400, 400 µM) Zn. Cd inhibited Zn accumulation in both ecotypes, especially under Zn400, in organs with active metal sequestration, i.e. roots of NHE and shoots of HE. Direct biochemical Cd/Zn competition at the metal-protein interaction and changes in transporter gene expression contributed to the observed accumulation patterns in the roots. Specifically, in HE, Cd stimulated SaZIP4 and SaPCR2 under Zn5, but downregulated SaIRT1 and SaZIP4 under Zn400. However, Cd downregulated related transporter genes, except for SaNRAMP1, in NHE, irrespective of Zn. Cadmium stimulated casparian strip (CSs) development in NHE, as part of the defense response, while it had a subtle effect on the (CS) in HE. Moreover, Cd delayed the initiation of the suberin lamellae (SL) in HE, but stimulated SL deposition in NHE under both Zn5 or Zn400. Changes in suberization were mainly ascribed to suberin-biosynthesis-related genes and hormonal signaling. Altogether, Cd regulated Zn accumulation mainly via symplasmic and transmembrane transport in HE, while Cd inhibited both symplasmic and apoplasmic Zn transport in NHE | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Chlorophyll fluorescence kinetics | |
| 650 | 4 | |a Endodermal differentiation | |
| 650 | 4 | |a Metal hyperaccumulation | |
| 650 | 4 | |a Metal uptake | |
| 650 | 4 | |a Phytoremediation | |
| 650 | 4 | |a Radial transport | |
| 650 | 4 | |a µXRF imaging | |
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| 700 | 1 | |a Morina, Filis |e verfasserin |4 aut | |
| 700 | 1 | |a Bokhari, Syed Nadeem Hussain |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Yunqi |e verfasserin |4 aut | |
| 700 | 1 | |a Küpper, Hendrik |e verfasserin |4 aut | |
| 700 | 1 | |a Tao, Qi |e verfasserin |4 aut | |
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