We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Exploring the transfer of recent plant photosynthates to soil microbes: mycorrhizal pathway vs direct root exudation.
- Authors
Kaiser, Christina; Kilburn, Matt R.; Clode, Peta L.; Fuchslueger, Lucia; Koranda, Marianne; Cliff, John B.; Solaiman, Zakaria M.; Murphy, Daniel V.
- Abstract
Plants rapidly release photoassimilated carbon (C) to the soil via direct root exudation and associated mycorrhizal fungi, with both pathways promoting plant nutrient availability. This study aimed to explore these pathways from the root's vascular bundle to soil microbial communities., Using nanoscale secondary ion mass spectrometry (Nano SIMS) imaging and 13C-phospho- and neutral lipid fatty acids, we traced in-situ flows of recently photoassimilated C of 13 CO2-exposed wheat ( Triticum aestivum) through arbuscular mycorrhiza ( AM) into root- and hyphae-associated soil microbial communities., Intraradical hyphae of AM fungi were significantly 13C-enriched compared to other root-cortex areas after 8 h of labelling. Immature fine root areas close to the root tip, where AM features were absent, showed signs of passive C loss and co-location of photoassimilates with nitrogen taken up from the soil solution. A significant and exclusively fresh proportion of 13C-photosynthates was delivered through the AM pathway and was utilised by different microbial groups compared to C directly released by roots., Our results indicate that a major release of recent photosynthates into soil leave plant roots via AM intraradical hyphae already upstream of passive root exudations. AM fungi may act as a rapid hub for translocating fresh plant C to soil microbes.
- Subjects
PHOTOSYNTHATES; SOIL microbiology; MYCORRHIZAL plants; EXUDATION (Botany); MASS spectrometry; WHEAT; VESICULAR-arbuscular mycorrhizas
- Publication
New Phytologist, 2015, Vol 205, Issue 4, p1537
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/nph.13138