ISSN:
1573-5036
Keywords:
arbuscular mycorrhiza
;
ecotoxicological test
;
fungal community
;
heavy metals
;
nested-PCR
;
organic pollutants
;
sewage sludge
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Nested PCR is a highly sensitive procedure for monitoring species of arbuscular mycorrhizal (AM) fungi and for determining their abundance in planta and in soil. DNA sequence variability in the D1 and D2 domains of the large ribosomal subunit is sufficient to design primers which discriminate between AM fungi at the species level. The usefulness of this molecular approach is illustrated in the present study on the differential impact of sewage sludges on a community of three AM fungi (Glomus mosseae, Glomus intraradices, Gigaspora rosea). Nested PCR was applied to trypan blue-stained mycorrhizal root fragments and soil mycelium from pot cultures of Medicago truncatula inoculated with the three fungi separately or together, and grown in sand containing sewage sludge that had been enriched or not with metallic or organic pollutants. G. intraradices and Gig. rosea varied in behaviour depending on whether they were inoculated alone or as a mixed community. G. mosseae showed a similar sensitivity towards each sewage sludge whether in community or alone, making it a potential candidate for ecotoxicological tests using M. truncatula to evaluate the quality or potential toxicity of sewage sludges which are widely used as fertilizers in agricultural lands.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1026475925703
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