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Tracking carbon from the atmosphere to the rhizosphere

Författare:
Publiceringsår: 2005
Språk: Engelska
Sidor: 1264-1270
Publikation/Tidskrift/Serie: Ecology Letters
Volym: 8
Nummer: 12
Dokumenttyp: Artikel
Förlag: Blackwell Publishing

Sammanfattning

Turnover rates of arbuscular mycorrhizal (AM) fungi may influence storage of soil organic carbon (SOC). We examined the longevity of AM hyphae in monoxenic cultures; and we also used C-13 incorporation into signature fatty acids to study C dynamics in a mycorrhizal symbiosis involving Glomus intraradices and Plantago lanceolata. C-13 enrichment of signature fatty acids showed rapid transfer of plant assimilates to AM fungi and a gradual release of C from roots to rhizosphere bacteria, but at a much slower rate. Furthermore, most C assimilated by AM fungi remained 32 days after labelling. These findings indicate that C-13 labelled fatty acids can be used to track C flux from the atmosphere to the rhizosphere and that retention of C in AM fungal mycelium may contribute significantly to SOC.

Disputation

Nyckelord

  • Biology and Life Sciences
  • Plantago lanceolata
  • intraradices
  • Glomus
  • carbon cycling
  • C-13
  • arbuscular mycorrhiza
  • bacteria
  • signature fatty acids
  • stable isotope

Övriga

Published
Yes
  • Microbial Ecology
  • ISSN: 1461-023X

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