Constructed wetlands and hyperaccumulators for the removal of heavy metal and metalloids: A review

Zhang, Xuehong; Lin, Yue; Lin, Hua; Yan, Jun

doi:10.1016/j.jhazmat.2024.135643

Journal of Hazardous Materials

2024

DOI: 10.1016/j.jhazmat.2024.135643

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Constructed wetlands and hyperaccumulators for the removal of heavy metal and metalloids: A review

Xuehong Zhang,

Yue Lin,

Hua Lin

et al.

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Cited by 5 publications

References 111 publications

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Melatonin‐Mediated Vacuolar Compartmentalization in Solanum nigrum L. Under Cadmium Stress

Yang,

Guan,

et al. 2024

Land Degrad Dev

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Melatonin has been identified as a potential mitigator of cadmium (Cd) stress in plants, though its precise cellular mechanisms remain poorly understood, particularly regarding its role in detoxification processes within the protoplast and vacuole. This study examines the effects of exogenous melatonin on Cd concentration and vacuolar compartmentalization in the leaf cells of Solanum nigrum L., a recognized hyperaccumulator plant. Employing subcellular separation techniques, we quantified levels of total Cd, Cd2+, ascorbic acid–glutathione (AsA‐GSH), and reactive oxygen species (ROS) in the protoplasts and vacuoles of leaf cells. Results reveal that vacuolar compartmentalization serves as a dynamic mechanism, balancing strategic sequestration and continuous metabolic activity in the cytoplasm, with 72.19%–79.89% of the Cd retained within the vacuole. Melatonin enhanced the effective allocation of these resources, contributing to the preservation of cellular homeostasis. In particular, outside the vacuole, melatonin treatment maintained relatively higher levels of glutathione/oxidized glutathione (GSH/GSSG) and ascorbic acid/dehydroascorbate (AsA/DHA) under 50 μM Cd stress. At this concentration, the AsA/DHA ratio increased from 0.71 to 2.20, and the GSH/GSSG ratio increased from 2.20 to 4.28 outside the vacuole, in comparison to treatment with Cd alone. These findings enhance our understanding of melatonin‐mediated cellular tolerance mechanisms, offer insights for improving plant Cd stress tolerance, and could inform genetic strategies for developing more efficient hyperaccumulator plants.

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Melatonin‐Mediated Vacuolar Compartmentalization in Solanum nigrum L. Under Cadmium Stress

Yang,

Guan,

et al. 2024

Land Degrad Dev

View full text Add to dashboard Cite

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Harnessing the rhizosphere sponge to smooth pH fluctuations and stabilize contaminant retention in biofiltration system

Wang,

Chi,

et al. 2025

Bioresource Technology

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Exploring the role of pyrite in promoting as attenuation in constructed wetland

Zhao,

Guo,

Dong

et al. 2024

Chemical Engineering Journal

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Constructed wetlands and hyperaccumulators for the removal of heavy metal and metalloids: A review

Cited by 5 publications

References 111 publications

Melatonin‐Mediated Vacuolar Compartmentalization in Solanum nigrum L. Under Cadmium Stress

Melatonin‐Mediated Vacuolar Compartmentalization in Solanum nigrum L. Under Cadmium Stress

Harnessing the rhizosphere sponge to smooth pH fluctuations and stabilize contaminant retention in biofiltration system

Exploring the role of pyrite in promoting as attenuation in constructed wetland

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