香根草枯枝提取土壤镉的研究。

IF 2.2 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Bulletin of Environmental Contamination and Toxicology Pub Date : 2025-06-05 DOI:10.1007/s00128-025-04066-1

Wenwen Li, Ning Liu, Xiaoling Tan, Ruoyao Shen, Jiaming Yu, Jie Li, Khateeb Hussain, Shiyong Yang

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引用次数: 0

摘要

香根草作为多年生草本植物，生物量高，为植物提取镉提供了可行的方法。本研究采用18和200 mg·kg-1两种Cd暴露水平，研究香根草体内Cd的积累情况。结果表明，死梢Cd含量达1412.35 mg·kg-1，是根系Cd含量的5.79倍。镉胁迫促进了土壤中铁的迁移，增加了植物中铁的积累。铁和Cd的相关性表明，铁和Cd的竞争抑制了香根草对Cd的代谢吸收。Cd胁迫加速了死梢的衰老，增加了气孔密度，表明Cd流入死梢的主要途径是Cd的血管运输。本研究为高镉污染土壤的植物提取提供了理论依据。

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Phytoextraction of Soil Cadmium by Vetiveria zizanioides Dead Shoots.

Vetiveria zizanioides, as a perennial herb with high biomass, provides a feasible method for the phytoextraction of cadmium (Cd). In this study, two levels of Cd exposure (18 and 200 mg·kg^-1) were performed to investigate Cd accumulation in Vetiveria zizanioides. The results showed that Cd content in dead shoots reached 1412.35 mg·kg^-1, 5.79 folds higher than that in roots. Cd stress promoted Fe mobility in the soil and increased Fe accumulation in plant. The correlation between Fe and Cd revealed that the competition between Fe and Cd inhibited the metabolic absorption of Cd in Vetiveria zizanioides. Cd stress accelerated shoot senescence and increased stomatal density, suggesting that Cd flowed into dead shoots was mainly motivated through its vessel transport. This study offers a theoretical basis for phytoextraction of high Cd-contaminated soils.

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来源期刊

Bulletin of Environmental Contamination and Toxicology 环境科学-毒理学

CiteScore

5.60

自引率

3.70%

发文量

230

审稿时长

1.7 months

期刊介绍： The Bulletin of Environmental Contamination and Toxicology(BECT) is a peer-reviewed journal that offers rapid review and publication. Accepted submissions will be presented as clear, concise reports of current research for a readership concerned with environmental contamination and toxicology. Scientific quality and clarity are paramount.