Symbiotic efficiency of autochthonous arbuscular mycorrhizal fungus (G. mosseae) and Brevibacillus sp. isolated from cadmium polluted soil under increasing cadmium levels

A. Vivas, I. Vörös, B. Bíró, E. Campos, J. M. Barea, R. Azcón

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

The effect of inoculation with indigenous naturally occurring microorganisms [an arbuscular mycorrhizal (AM) fungus and rhizosphere bacteria] isolated from a Cd polluted soil was assayed on Trifolium repens growing in soil contaminated with a range of Cd. One of the bacterial isolate showed a marked PGPR effect and was identified as a Brevibacillus sp. Mycorrhizal colonization also enhanced Trifolium growth and N, P, Zn and Ni content and the dually inoculated (AM fungus plus Brevibacillus sp.) plants achieved further growth and nutrition and less Cd concentration, particularly at the highest Cd level. Increasing Cd level in the soil decreased Zn and Pb shoot accumulation. Coinoculation of Brevibacillus sp. and AM fungus increased shoot biomass over single mycorrhizal plants by 18% (at 13.6 mg Cd kg-1), 26% (at 33.0 mg Cd kg-1) and 35% (at 85.1 mg Cd kg-1). In contract, Cd transfer from soil to plants was substantially reduced and at the highest Cd level Brevibacillus sp. lowered this value by 37.5% in AM plants. Increasing Cd level highly reduced plant mycorrhization and nodulation. Strong positive effect of the bacterium on nodule formation was observed in all treatments. Results show that selected ubiquitous microorganisms, applied as enriched inocula, are important in plant Cd tolerance and development in Cd polluted soils.

Original languageEnglish
Pages (from-to)179-189
Number of pages11
JournalEnvironmental Pollution
Volume126
Issue number2
DOIs
Publication statusPublished - Nov 1 2003

Fingerprint

Brevibacillus
Fungi
Cadmium
cadmium
Soil
fungus
Soils
Trifolium
soil
Microorganisms
Bacteria
shoot
microorganism
Nutrition
Rhizosphere
bacterium
nodulation
Growth
Contracts
Biomass

Keywords

  • Arbuscular mycorrhizal fungus
  • Brevibacillus sp
  • Cadmium levels
  • Rhizobium sp

ASJC Scopus subject areas

  • Environmental Chemistry
  • Environmental Science(all)
  • Pollution

Cite this

Symbiotic efficiency of autochthonous arbuscular mycorrhizal fungus (G. mosseae) and Brevibacillus sp. isolated from cadmium polluted soil under increasing cadmium levels. / Vivas, A.; Vörös, I.; Bíró, B.; Campos, E.; Barea, J. M.; Azcón, R.

In: Environmental Pollution, Vol. 126, No. 2, 01.11.2003, p. 179-189.

Research output: Contribution to journalArticle

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