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适用于汞污染土壤植物修复和生物指示的杂草

: Applicable Weed in Phytoremediation and Bioindication of Soil Contamination by Mercury.

作者信息

de Oliveira Evandro Alves, da Silva Larissa Cavalheiro, Battirola Leandro Dênis, de Andrade Ricardo Lopes Tortorela

机构信息

Federal University of Mato Grosso, Sinop Campus; Institute of Natural, Human and Social Sciences Graduate Program in Environmental Sciences. 1200 Alexandre Ferronato Avenue, Industrial Sector, Sinop 78557-267, Mato Grosso, Brazil.

出版信息

ACS Omega. 2025 Jun 17;10(25):27515-27524. doi: 10.1021/acsomega.5c03362. eCollection 2025 Jul 1.

Abstract

Spontaneous plants have significant potential for phytoremediation of metal-contaminated soils. This study evaluated . for mercury (Hg) decontamination. The plant was cultivated in a sand and vermiculite (1:1) substrate with Hg concentrations of 0, 1, 3, 5, and 7 mg kg. After 90 days, biometric growth and total Hg uptake by the aerial and root tissues were analyzed. Bioconcentration (BCF), translocation (TF), and bioaccumulation (BAF) factors, along with the elongation ratio (RER), tolerance (TI), and absorption (AI) indices, were used to assess the phytoremediation potential. BAF ranged from 1.46 to 11.04, BCF ranged from 6.07 to 30.31, and TF averaged 0.72, showing high Hg accumulation in roots and shoots. Vegetative development was affected by the concentration of Hg in the substrate (Hg), with TI varying from 97 to 6.62% at Hg of 1 and 7 mg kg, respectively. AI increased proportionally to Hg, ranging from 8.12 to 17.81 μg, indicating that the mass of Hg absorbed by the plant increased even with a reduction in biomass production. , despite the reduction in its biomass, did not show any visual signs of chlorosis or necrosis, demonstrating resistance to Hg toxicity. These findings suggest that is a promising phytoremediator for soil decontamination and bioindication of Hg contamination, contributing to global efforts to protect, restore, and promote the sustainable use of terrestrial ecosystems and to halt and reverse land degradation and biodiversity loss.

摘要

自发植物在金属污染土壤的植物修复方面具有巨大潜力。本研究评估了……用于汞(Hg)净化。该植物种植在沙子和蛭石(1:1)的基质中,汞浓度分别为0、1、3、5和7毫克/千克。90天后,分析了生物量生长以及地上和根部组织对总汞的吸收情况。生物富集系数(BCF)、转运系数(TF)和生物累积系数(BAF),以及伸长率(RER)、耐受性(TI)和吸收指数(AI)被用于评估植物修复潜力。BAF范围为1.46至11.04,BCF范围为6.07至30.31,TF平均为0.72,表明根部和地上部分汞积累量高。营养生长受到基质中汞浓度(Hg)的影响,在汞浓度为1和7毫克/千克时,TI分别从97%变化到6.62%。AI与汞成比例增加,范围从8.12至17.81微克,表明即使生物量产量降低,植物吸收的汞质量仍增加。……尽管其生物量减少,但未表现出任何黄化或坏死的视觉迹象,表明对汞毒性具有抗性。这些发现表明……是一种有前途的植物修复剂,可用于土壤净化和汞污染的生物指示,有助于全球保护、恢复和促进陆地生态系统可持续利用的努力,并制止和扭转土地退化及生物多样性丧失。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7853/12223833/9fe6196e65ec/ao5c03362_0001.jpg

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