Accumulation of As, Pb, Zn, Cd and Cu and arbuscular mycorrhizal status in populations of Cynodon dactylon grown on metal-contaminated soils

F. Y. Wu, Y. L. Bi, H. M. Leung, Z. H. Ye, X. G. Lin, Ming Hung WONG*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

Metal(loid) accumulation and arbuscular mycorrhizal (AM) status of the dominant plant species, Cynodon dactylon, growing at four multi-metal(loid)s-contaminated sites and an uncontaminated site of China were investigated. Up to 94.7 As mg kg-1, 417 Pb mg kg-1, 498 Zn mg kg-1, 5.8 Cd mg kg-1 and 27.7 Cu mg kg-1 in shoots of C. dactylon were recorded. The plant was colonized consistently by AM fungi (33.0-65.5%) at both uncontaminated site and metal-contaminated sites. Based on morphological characteristics, fourteen species of AM fungi were identified in the rhizosphere of C. dactylon, with one belonging to the genus of Acaulospora and the other thirteen belonging to the genus of Glomus. Glomus etunicatum was the most common species associated with C. dactylon growing at metal-contaminated sites. Spore abundance in the rhizosphere of C. dactylon growing at the metal-contaminated soils (22-82 spores per 25 g soil) was significantly lower than that of the uncontaminated soils (371 spores per 25 g soil). However, AM fungal species diversity in the metal-contaminated soils was significantly higher than that in the uncontaminated soils. This is the first report of AM status in the rhizosphere of C. dactylon, the dominant plant survival in metal-contaminated soils. The investigation also suggests that phytorestoration of metal-contaminated sites might be facilitated using the appropriate plant with the aid of tolerant AM fungi.

Original languageEnglish
Pages (from-to)213-218
Number of pages6
JournalApplied Soil Ecology
Volume44
Issue number3
DOIs
Publication statusPublished - Mar 2010

Scopus Subject Areas

  • Ecology
  • Agricultural and Biological Sciences (miscellaneous)
  • Soil Science

User-Defined Keywords

  • AM fungal diversity
  • Heavy metals
  • Phytoremediation
  • Spore abundance

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