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Ectomycorrhizal mycelia reduce bacterial activity in a sandy soil

Författare:
Publiceringsår: 1996
Språk: Engelska
Sidor: 77-86
Publikation/Tidskrift/Serie: FEMS Microbiology Ecology
Volym: 21
Nummer: 2
Dokumenttyp: Artikel
Förlag: Wiley-Blackwell Publishing Ltd.

Sammanfattning

Bacterial activity was studied in a growth system containing Pinus contorta seedlings inoculated with different mycorrhizal fungi. Nylon nets enabled separation of soil compartments with extramatrical mycorrhizal hyphae from soil compartments with roots and mycelium. In three separate experiments bacterial activity, estimated as thymidine incorporation, was reduced in soils with Paxillus involutus hyphae compared to controls without mycorrhizal hyphae. This effect was found irrespective of compartments with and without roots were compared. Laccaria bicolor only reduced the activity in one of these three experiments. Thelephora terrestris (tested in two experiments), Laccaria proxima, Suillus variegatus and Hebeloma crustuliniforme (one experiment), also reduced the thymidine and leucine incorporation rates of bacteria. The reduction for these fungi varied between 20% and 50% in all experiments. Numbers of viable bacteria appeared to be reduced by T. terrestris, L. proxima, S. variegatus and H. crustuliniforme in one experiment, while no effect was seen in the other experiments.

Disputation

Nyckelord

  • Biology and Life Sciences
  • Thymidine incorporation
  • Leucine incorporation
  • Paxillus involutus
  • Laccaria bicolor
  • Ectomycorrhiza
  • Bacterial activity

Övriga

Published
Yes
  • Microbial Ecology
  • ISSN: 0168-6496 (Print)
  • ISSN: 1574-6941 (Online)

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