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Microbial siderophores and root exudates enhanced goethite dissolution and Fe/As uptake by As-hyperaccumulator Pteris vittata
Abstract
Arsenic (As) in soils is often adsorbed on Fe-(hydro)oxides surface, rendering them more resistant to dissolution, which is undesirable for phytoremediation of As-contaminated soils. Arsenic hyperaccumulator Pteris vittata prefers to grow in calcareous soils where available Fe and As are low. To elucidate its mechanisms of acquiring Fe and As from insoluble sources in soils, we investigated dissolution of goethite with pre-adsorbed arsenate (AsV; As-goethite) in presence of four organic ligands, including two root exudates (oxalate and phytate, dominant in P. vittata) and two microbial siderophores (PG12-siderophore and desferrioxamine B). Their presence increased As solubilization from As-goethite from 0.03 to 0.27-5.33 mg L-1 compared to the control. The siderophore/phytate bi-ligand treatment released 7.42 mg L-1 soluble Fe, which was 1.2-fold that of the sum of siderophore and phytate, showing a synergy in promoting As-goethite dissolution. In the ligand-mineral-plant system, siderophore/phytate was most effective in releasing As and Fe from As-goethite. Moreover, the continuous plant uptake induced more As-goethite dissolution. The continued release of As and Fe significantly enhanced their plant uptake (from 0.01 to 0.43 mg plant-1 As and 2.7-14.8 mg plant-1 Fe) and plant growth (from 1.2 to 3.1 g plant-1 fw) in P. vittata. Since microbial siderophores and root exudates often coexist in soil rhizosphere, their synergy in enhancing dissolution of insoluble As-Fe minerals may play an important role in efficient phytoremediation of As-contaminated soils.
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Pteris vittata used phytate, a root exudate, to enhance the uptake of As and increase plant growth and development.
“In addition, Pteris vittata (Chinese Brake fern) used phytate, a root exudate, to enhance the uptake of As and increase plant growth and development (Liu et al., 2017).”
From Plant hyperaccumulators: a state-of-the-art review on mechanism of heavy metal transport and sequestration (2025) · cites this paper as Liu et al., 2017
Transport of Cd was mediated by overexpression of HMA3 in leaf epidermal cells of Sedum plumbizincicola.
“Transport of Cd was mediated by overexpression of HMA3 in leaf epidermal cells of Sedum plumbizincicola.”
From Plant hyperaccumulators: a state-of-the-art review on mechanism of heavy metal transport and sequestration (2025) · cites this paper as Liu et al., 2017
HMA3 was predominantly expressed in bundle sheath and mesophyll cells in A. halleri and N. caerulescens.
“At the same time, HMA3 was predominantly expressed in bundle sheath and mesophyll cells in A. halleri and N. caerulescens (Liu et al., 2017: Mishra et al., 2017).”
From Plant hyperaccumulators: a state-of-the-art review on mechanism of heavy metal transport and sequestration (2025) · cites this paper as Liu et al., 2017
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Bhat, B. A., Rather, M. A., Bilal, T., Nazir, R., Qadir, R. U., & Mir, R. A. (2025) · Frontiers in Plant Science · doi:10.3389/fpls.2025.1631378 · Cited by 68
“At the same time, HMA3 was predominantly expressed in bundle sheath and mesophyll cells in A. halleri and N. caerulescens (Liu et al., 2017: Mishra et al., 2017).”
InfluentialYan, Y., Yang, J., Wan, X., Shi, H., Yang, J., Ma, C., Lei, M., & Chen, T. (2022) · Science of The Total Environment · doi:10.1016/j.scitotenv.2021.152475 · Cited by 25
Metadata
- Authors
- Liu, X., Fu, J., Da Silva, E., Shi, X., Cao, Y., Rathinasabapathi, B., Chen, Y., & Ma, L. Q.
- Affiliations
- State Key Laboratory of Pollution Control and Resource Reuse (CN)
- University of Florida (US)
- Corresponding author
- Chen, Yanshan
- Venue
- Environmental Pollution
- Publisher
- Elsevier BV
- Published
- 2017-04
- Volume
- 223
- Pages
- 230-237
- ISSN
- 0269-7491 (ISSN-L)
- OpenAlex
- W2572912275
- Cited by
- 73
- References
- 45
- Citations by year
- 2026: 6 · 2025: 9 · 2024: 2 · 2023: 5 · 2022: 9 · 2021: 5 · 2020: 11 · 2019: 8 · 2018: 10 · 2017: 8
- FWCI
- 5.95
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Environmental Pollution (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Key Research and Development Program of China (2016YFD0800801)
- State Key Program of National Natural Science Foundation of China (21637002)
- Jiangsu Provincial Innovation Team Program (0211001802)
- Nanjing University (201602B052)
- Topics
- Physical Sciences › Environmental Science › Environmental Chemistry › Arsenic contamination and mitigation
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Micronutrient Interactions and Effects
- Keywords
- arsenic hyperaccumulator, Pteris vittata, arsenate adsorption, microbial siderophores, desferrioxamine B, root exudates, oxalate, phytic acid, iron absorption, arsenic uptake, phytoremediation, arsenic-contaminated soil, rhizosphere
- MeSH terms
- Arsenicals, Biodegradation, Environmental, Minerals, Soil, Soil Pollutants, Solubility, Siderophores, Plant Roots, Pteris, Iron Compounds
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