Tracking carbon from the atmosphere to the rhizosphere
Author
Summary, in English
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.
Publishing year
2005
Language
English
Pages
1264-1270
Publication/Series
Ecology Letters
Volume
8
Issue
12
Links
Document type
Journal article
Publisher
Wiley-Blackwell
Topic
- Ecology
Keywords
- Plantago lanceolata
- intraradices
- Glomus
- carbon cycling
- C-13
- arbuscular mycorrhiza
- bacteria
- signature fatty acids
- stable isotope
Status
Published
Research group
- Microbial Ecology
- Plant Biology
ISBN/ISSN/Other
- ISSN: 1461-023X