Symbiotic role of Glomus mosseae in phytoextraction of lead in vetiver grass [Chrysopogon zizanioides (L.)]

Pravin Punamiya, Rupali Datta, Dibyendu Sarkar, Summer Barber, Mandakini Patel, Padmini Das

Research output: Contribution to journalArticlepeer-review

159 Scopus citations

Abstract

Lead (Pb) has limited solubility in the soil environment owing to complexation with various soil components. Although total soil Pb concentrations may be high at a given site, the fraction of soluble Pb that plants can extract is very small, which is the major limiting factor for Pb phytoremediation. The symbiotic effect of arbuscular mycorrhizal (AM) fungus, Glomus mosseae was examined on growth and phytoextraction of lead (Pb) by vetiver grass [Chrysopogon zizanioides (L.)]. A hydroponic study, Phase I (0, 1, 2, and 4mM Pb) was conducted followed by an incubation pot study, Phase II (0, 400, 800, and 1200mgkg-1 Pb) where vetiver plants were colonized with G. mosseae. The results obtained indicate that plants colonized by the AM fungi not only exhibit better growth (increase in plant biomass), but also significantly increase Pb uptake in root and higher translocation to the shoot at all given treatments. Moreover, plants colonized with AM fungi had higher chlorophyll content and reduced levels of low molecular weight thiols, indicating the ability to better tolerate metal-induced stress. Results from this study indicate that vetiver plants in association with AM fungi can be used for improved phytoextraction of Pb from contaminated soil.

Original languageEnglish
Pages (from-to)465-474
Number of pages10
JournalJournal of Hazardous Materials
Volume177
Issue number1-3
DOIs
StatePublished - May 2010

Keywords

  • Arbuscular mycorrhizal fungus
  • Glomus mosseae
  • Lead
  • Phytoextraction
  • Vetiver grass

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