Du är här

Carbon allocation in mycelia of arbuscular mycorrhizal fungi during colonisation of plant seedlings

Författare:
Publiceringsår: 2007
Språk: Engelska
Sidor: 1450-1458
Publikation/Tidskrift/Serie: Soil Biology & Biochemistry
Volym: 39
Nummer: 7
Dokumenttyp: Artikel
Förlag: Elsevier Science Ltd

Sammanfattning

The direction of carbon (C) allocation in mycorrhizal mycelia is of fundamental importance to coexistence of individual plants. We therefore investigated the transfer of C from established plants to plant seedlings through fungal mycelia. C allocation by the arbuscular mycorrhizal (AM) fungus Glomus intraradices, from 'donor' plants to mycelia in soil and two different species of introduced 'receiver' seedlings, was investigated in a pot experiment using C-13 labelling and fatty acid analysis. After (CO2)-C-13 application to the shoots of Trifolium subterraneum or Plantago lanceolata, used as donor plants, T subterraneum and P. lanceolata receiver seedlings were introduced. Samples were collected 4-20 days after (CO2)-C-13 application and analysed regarding C-13 and the fatty acid 16:1 omega 5, the signature of AM fungi. C-13 transfer from T subterraneum donor plants was demonstrated by C-13 enrichment of the roots of the receiver seedlings, but not from the P. lanceolata donor plants. C-13 allocation to the neutral lipid fatty acid 16:1 omega 5 was only 1 ng in each receiver seedling, but 2 mu g of the fatty acid in whole soil. The results indicate that C allocation through mycelial networks is influenced by the donor plant species, but is not directed towards receiver seedlings to any higher degree than towards other directions. The importanice of the extraradical AM fungal mycelium as a C sink was demonstrated. (c) 2007 Elsevier Ltd. All rights reserved.

Disputation

Nyckelord

  • Biology and Life Sciences
  • C allocation
  • arbuscular mycorrhizal (AM) fungi
  • C-13
  • fatty acid
  • lipid
  • mycelial network

Övriga

Published
Yes
  • Microbial Ecology
  • ISSN: 0038-0717

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

 

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen