Plant growth and metal distribution in tissues of Prosopis juliflora-velutina grown on chromium contaminated soil in the presence of Glomus deserticola.
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(-1) 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.
Arias
Jack A
JA
Environmental Science and Engineering, Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, Texas 79968, USA.
Peralta-Videa
Jose R
JR
Ellzey
Joanne T
JT
Viveros
Marian N
MN
Ren
Minghua
M
Mokgalaka-Matlala
Ntebogeng S
NS
Castillo-Michel
Hiram
H
Gardea-Torresdey
Jorge L
JL
D000681:Amylases / Q000378:metabolism; D002857:Chromium / Q000378:metabolism*; D046529:Microscopy, Electron, Transmission; D038821:Mycorrhizae / Q000201:enzymology / Q000378:metabolism*; D029862:Prosopis / Q000254:growth & development* / Q000378:metabolism; D012989:Soil Pollutants / Q000378:metabolism*; D014018:Tissue Distribution
D012989:Soil Pollutants; D002857:Chromium; D000681:Amylases
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