Nano Zero-Valent Iron Mediated Metal(loid) Uptake and Translocation by Arbuscular Mycorrhizal Symbioses

被引：49

作者：

Wu, Songlin ^{[1
]}

Vosatka, Miroslav ^{[2
]}

Vogel-Mikus, Katarina ^{[3
,4
]}

Kavcic, Anja ^{[3
]}

Kelemen, Mitja ^{[4
]}

Sepec, Luka ^{[4
]}

Pelicon, Primoz ^{[4
]}

Skala, Roman ^{[5
,6
]}

Powter, Antonio Roberto Valero ^{[1
]}

Teodoro, Manuel ^{[1
]}

Michalkova, Zuzana ^{[1
]}

Komarek, Michael ^{[1
]}

机构：

[1] Czech Univ Life Sci Prague, Fac Environm Sci, Dept Environm Geosci, Kamycka 129, Prague 16500, Czech Republic

[2] Czech Acad Sci, Inst Bot, Dept Mycorrhizal Symbioses, Pruhonice 27253, Czech Republic

[3] Univ Ljubljana, Biotech Fac, Dept Biol, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia

[4] Jozef Stefan Inst, Jamova 39, SI-1000 Ljubljana, Slovenia

[5] Czech Acad Sci, Inst Geol, Rozvojova 269, CZ-16500 Prague 6, Czech Republic

[6] Charles Univ Prague, Inst Geochem Mineral & Mineral Resources, Fac Sci, Albertov 6, CZ-12843 Prague 2, Czech Republic

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2018年 / 52卷 / 14期

关键词：

FUNGUS GLOMUS-MOSSEAE; ZEA-MAYS L; RHIZOPHAGUS-INTRARADICES; CHROMIUM IMMOBILIZATION; ROOTS; ZINC; BIOAVAILABILITY; PHOSPHORUS; CADMIUM; METALS;

D O I：

10.1021/acs.est.7b05516

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Nano zero-valent iron (nZVI) has great potential in the remediation of metal(loid)-contaminated soils, but its efficiency in metal(loid) stabilization in the plant-microbe continuum is unclear. This study investigated nZVI-mediated metal(loid) behavior in the arbuscular mycorrhizal (AM) fungal-maize (Zea mays L.) plant association. Plants with AM fungal inoculation were grown in metal(loid)- (mainly Zn and Pb) contaminated soils (Litavka River, Czech Republic) amended with/without 0.5% (w/w) nZVI. The results showed that nZVI decreased plant metal(loid) uptake but inhibited AM development and its function in metal(loid) stabilization in the rhizosphere. AM fungal inoculation alleviated the physiological stresses caused by nZVI and restrained nZVI efficiency in reducing plant metal(loid) uptake. Micro proton-induced X-ray emission (pt-PIXE) analysis revealed the sequestration of Zn (possibly through binding to thiols) by fungal structures in the roots and the precipitation of Pb and Cu in the mycorrhizal root rhizodermis (possibly by Fe compounds originated from nZVI). XRD analyses further indicated that Pb/Fe mineral transformations in the rhizosphere were influenced by AM and nZVI treatments. The study revealed the counteractive effects of AM and nZVI on plant metal(loid) uptake and uncovered details of metal(loid) behavior in the AM fungal-root-nZVI system, calling into question about nZVI implementation in mycorrhizospheric systems.

引用

页码：7640 / 7651

页数：12

共 75 条

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