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Master Thesis

The role of arbuscular mycorrhizal fungi in N20 and N2 emissions

Abstract : N20 is a potent greenhouse gas with a great global warming potential and which is released by agricultural soils. The ecological processes that regulate its emission from soil are still poorly understood. In the present study, we hypothesized that the presence of arbuscular mycorrhizal fungi (AMF), which belong to the fungal phylum of the Glomeromycota and which form a symbiosis with the majority of land plants species, can reduce N20 emissions and enhance N2 emissions by influencing denitrification in the soil. The denitrification process and it`s interactions with AMF could also be governed by the carbon supply and the nitrogen supply in the soil. To test the effect of AMF on N20 emissions and the mechanisms associated, we conducted a greenhouse experiment in using two different microcosms planted with either non-mycorrhizal tomato mutants or its mycorrhizal progenitor wild-type. To manipulate the carbon and nitrogen availability in the soil, we used a shading treatment with a high and a low light supply, and a fertilization treatment with a high and a low nutrient supply. We did not find clear significant effect of AMF on N20 and N2 gas emissions and could not propose new mechanistic pathways of the factors that could influence this process. Our results suggest further investigations and ameliorations of the methods.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-01082238
Contributor : Agrocampus Ouest <>
Submitted on : Thursday, November 13, 2014 - 9:28:23 AM
Last modification on : Monday, July 6, 2020 - 3:38:21 PM
Long-term archiving on: : Friday, April 14, 2017 - 11:45:07 AM

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  • HAL Id : dumas-01082238, version 1

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Anne-Laure Corbel. The role of arbuscular mycorrhizal fungi in N20 and N2 emissions. Agricultural sciences. 2014. ⟨dumas-01082238⟩

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