Multi-Scale Tolerance Mechanisms of Xanthium strumarium L. Under Lead Stress and Its Application in Phytoremediation DOI Creative Commons
Shilin Xu, Xiaofang Wang,

Zhixin Meng

и другие.

Plants, Год журнала: 2025, Номер 14(9), С. 1307 - 1307

Опубликована: Апрель 26, 2025

Heavy metal pollution poses a global environmental challenge, with lead (Pb) being particularly concerning due to its persistence and toxicity. This study investigated Xanthium strumarium L. from China’s Yellow River Sanmenxia section through hydroponic experiments (0–600 mg/L Pb2+, 1–11 d exposure) elucidate Pb2+ response mechanisms. Integrated analyses (EDX, FTIR, thermogravimetry, hyperspectral imaging) revealed three-phase sequestration strategy: the roots immobilized 88.55% of Pb pectin carboxyl de-esterification lignin–Pb complexation, while stems leaves retained <11.14% <0.31%, respectively. A critical threshold (300 mg/L) triggered nonlinear accumulation escalation. Thermogravimetric analysis demonstrated enhanced cell wall stability under stress (66.7% residual carbon increase at 600 mg/L). Hyperspectral features (1670 nm band intensity) effectively tracked physiological dynamics. The findings establish X. strumarium’s superior suitability for root-based immobilization rather than phytoextraction in Pb-contaminated sites, low translocation efficiency minimizing ecological risks. identified concentration spectral biomarkers provide multi-scale insights optimizing situ phytostabilization strategies, advancing both theoretical understandings practical applications heavy remediation.

Язык: Английский

Multi-Scale Tolerance Mechanisms of Xanthium strumarium L. Under Lead Stress and Its Application in Phytoremediation DOI Creative Commons
Shilin Xu, Xiaofang Wang,

Zhixin Meng

и другие.

Plants, Год журнала: 2025, Номер 14(9), С. 1307 - 1307

Опубликована: Апрель 26, 2025

Heavy metal pollution poses a global environmental challenge, with lead (Pb) being particularly concerning due to its persistence and toxicity. This study investigated Xanthium strumarium L. from China’s Yellow River Sanmenxia section through hydroponic experiments (0–600 mg/L Pb2+, 1–11 d exposure) elucidate Pb2+ response mechanisms. Integrated analyses (EDX, FTIR, thermogravimetry, hyperspectral imaging) revealed three-phase sequestration strategy: the roots immobilized 88.55% of Pb pectin carboxyl de-esterification lignin–Pb complexation, while stems leaves retained <11.14% <0.31%, respectively. A critical threshold (300 mg/L) triggered nonlinear accumulation escalation. Thermogravimetric analysis demonstrated enhanced cell wall stability under stress (66.7% residual carbon increase at 600 mg/L). Hyperspectral features (1670 nm band intensity) effectively tracked physiological dynamics. The findings establish X. strumarium’s superior suitability for root-based immobilization rather than phytoextraction in Pb-contaminated sites, low translocation efficiency minimizing ecological risks. identified concentration spectral biomarkers provide multi-scale insights optimizing situ phytostabilization strategies, advancing both theoretical understandings practical applications heavy remediation.

Язык: Английский

Процитировано

0