期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 44, 期 19, 页码 7272-7279出版社
AMER CHEMICAL SOC
DOI: 10.1021/es1008664
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资金
- National Science Foundation and the Environmental Protection Agency [EF 0830117]
- USDA [2008-38422-19138]
- Analytical Cytology Core Facility
- BBRC
- NIH NCRR [2G12RR008124-16A1]
- NSF [CHE-0840525]
- Direct For Biological Sciences
- Div Of Biological Infrastructure [0830117] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0840525] Funding Source: National Science Foundation
Arbuscular mycorrhizal fungi have been known to increase metal uptake in plants. In this study, mesquite (Prosopis juliflora-velutina) inoculated with Glomus deserticola or amended with EDTA were grown for 30 days in soil containing Cr(III) or Cr(VI) at 0, 40, 80, and 160 mg kg(-1). Total amylase activity (TAA) was monitored as a stress indicator. Element concentrations and distribution in tissue were determined using ICP-OES, electron scanning microprobe, and TEM. Inoculated Cr(VI) treated plants had 21% and 30% more Cr than uninoculated and EDTA treated roots, respectively, at 80 mg Cr kg treatment. In the case of Cr(III), EDTA produced the highest Cr accumulation in roots. TAA was higher in inoculated plants grown with Cr(III) at 80 and 160 mg kg(-1) and Cr(VI) at 40 and 160 mg kg(-1). The X-ray mapping showed higher metal concentrations in the vascular system of inoculated plants and the TEM micrographs demonstrated the presence of G. deserticola in roots.
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