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- Title
Tracking carbon from the atmosphere to the rhizosphere.
- Authors
Olsson, Pål A.; Johnson, Nancy C.; Klironomos, John
- Abstract
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 13C incorporation into signature fatty acids to study C dynamics in a mycorrhizal symbiosis involving Glomus intraradices and Plantago lanceolata. 13C 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 13C 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.
- Subjects
MYCORRHIZAS; FUNGI; CARBON in soils; HYPHAE of fungi; CULTURE
- Publication
Ecology Letters, 2005, Vol 8, Issue 12, p1264
- ISSN
1461-023X
- Publication type
Letter
- DOI
10.1111/j.1461-0248.2005.00831.x