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Abstract Detail


Law, Shelby [1], Maherali, Hafiz [2].

The effect of phosphorus on arbuscular mycorrhizal mediated soil carbon storage.

Arbuscular mycorrhizal (AM) fungi contribute to carbon storage by transporting carbon fixed by plant hosts into soil through the production of hyphae and, potentially, glomalin-related soil protein. However, the transport of carbon to AM fungi is dependent on the maintenance of the mutualism between plants and AM fungi. Arbuscular mycorrhizal fungi may be less mutualistic in high phosphorous environments, which could result in a reduction in AM fungal-mediated carbon storage. To test this prediction, we grew Trifolium pratense in a common background soil inoculated with soil from 10 sites with varying histories of phosphorus deposition. We expected that plants inoculated with soil biota from higher phosphorous sites will have lower biomass and root colonization by AM fungi, resulting in lower glomalin-related soil protein production. Contrary to expectations, plants inoculated with AM fungi from higher phosphorus sites had a greater biomass than plants inoculated with AM fungi from lower phosphorus sites. Analysis of AM fungal growth and glomalin-related soil protein is underway, but this preliminary result suggests that AM fungal inoculum derived from soil with a high legacy of soil phosphorus remains beneficial to plant growth and, subsequently, soil carbon storage.

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1 - 90 Neeve St, Guelph, ON, N1e5s1, Canada
2 - University Of Guelph, Department Of Integrative Biology, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada

arbuscular mycorrhizal fungi
Carbon sequestration

Presentation Type: Oral Paper
Session: MY7, Mycology: Fungus-Plant Interactions: Arbuscular Mycorrhizae, Climate Change, and Microbiome
Location: /
Date: Friday, July 23rd, 2021
Time: 11:00 AM(EDT)
Number: MY7005
Abstract ID:352
Candidate for Awards:None

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