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Commercial arbuscular mycorrhizal fungal inoculant failed to establish in a vineyard despite priority advantage

BACKGROUND: Arbuscular mycorrhizal (AM) fungi associate with most plants and can increase nutrient uptake. As a result, commercial inoculants called “biofertilizers” containing AM fungi have been developed and marketed to increase plant performance. However, successful establishment of these inocula...

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Autores principales: Thomsen, Corrina, Loverock, Laura, Kokkoris, Vasilis, Holland, Taylor, Bowen, Patricia A., Hart, Miranda
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8071076/
https://www.ncbi.nlm.nih.gov/pubmed/33981489
http://dx.doi.org/10.7717/peerj.11119
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author Thomsen, Corrina
Loverock, Laura
Kokkoris, Vasilis
Holland, Taylor
Bowen, Patricia A.
Hart, Miranda
author_facet Thomsen, Corrina
Loverock, Laura
Kokkoris, Vasilis
Holland, Taylor
Bowen, Patricia A.
Hart, Miranda
author_sort Thomsen, Corrina
collection PubMed
description BACKGROUND: Arbuscular mycorrhizal (AM) fungi associate with most plants and can increase nutrient uptake. As a result, commercial inoculants called “biofertilizers” containing AM fungi have been developed and marketed to increase plant performance. However, successful establishment of these inoculants remains a challenge, and may be negatively impacted by competition with fungi already present (priority effects). Perennial agriculture may be more amenable if inoculants can be successfully established on crops prior to field planting. METHODS: Here, we inoculate grapevine (Vitis vinifera) with a commercial inoculant in three treatments designed to manipulate the strength and direction of priority effects and quantified the abundance of the fungal strain before and after introduction using droplet digital PCR (ddPCR). RESULTS: We found that the introduced strain did not establish in any treatment, even with priority advantage, and inoculated vines did not differ in performance from non-inoculated vines. Fungal abundance was not greater than in pre-inoculation soil samples during any of the five years sampled and may have been impaired by high available phosphorus levels in the soil. This study highlights the need to understand and evaluate how the management of the agricultural system will affect establishment before introduction of “biofertilizers”, which is often unpredictable.
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spelling pubmed-80710762021-05-11 Commercial arbuscular mycorrhizal fungal inoculant failed to establish in a vineyard despite priority advantage Thomsen, Corrina Loverock, Laura Kokkoris, Vasilis Holland, Taylor Bowen, Patricia A. Hart, Miranda PeerJ Agricultural Science BACKGROUND: Arbuscular mycorrhizal (AM) fungi associate with most plants and can increase nutrient uptake. As a result, commercial inoculants called “biofertilizers” containing AM fungi have been developed and marketed to increase plant performance. However, successful establishment of these inoculants remains a challenge, and may be negatively impacted by competition with fungi already present (priority effects). Perennial agriculture may be more amenable if inoculants can be successfully established on crops prior to field planting. METHODS: Here, we inoculate grapevine (Vitis vinifera) with a commercial inoculant in three treatments designed to manipulate the strength and direction of priority effects and quantified the abundance of the fungal strain before and after introduction using droplet digital PCR (ddPCR). RESULTS: We found that the introduced strain did not establish in any treatment, even with priority advantage, and inoculated vines did not differ in performance from non-inoculated vines. Fungal abundance was not greater than in pre-inoculation soil samples during any of the five years sampled and may have been impaired by high available phosphorus levels in the soil. This study highlights the need to understand and evaluate how the management of the agricultural system will affect establishment before introduction of “biofertilizers”, which is often unpredictable. PeerJ Inc. 2021-04-22 /pmc/articles/PMC8071076/ /pubmed/33981489 http://dx.doi.org/10.7717/peerj.11119 Text en ©2021 Thomsen et al. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Agricultural Science
Thomsen, Corrina
Loverock, Laura
Kokkoris, Vasilis
Holland, Taylor
Bowen, Patricia A.
Hart, Miranda
Commercial arbuscular mycorrhizal fungal inoculant failed to establish in a vineyard despite priority advantage
title Commercial arbuscular mycorrhizal fungal inoculant failed to establish in a vineyard despite priority advantage
title_full Commercial arbuscular mycorrhizal fungal inoculant failed to establish in a vineyard despite priority advantage
title_fullStr Commercial arbuscular mycorrhizal fungal inoculant failed to establish in a vineyard despite priority advantage
title_full_unstemmed Commercial arbuscular mycorrhizal fungal inoculant failed to establish in a vineyard despite priority advantage
title_short Commercial arbuscular mycorrhizal fungal inoculant failed to establish in a vineyard despite priority advantage
title_sort commercial arbuscular mycorrhizal fungal inoculant failed to establish in a vineyard despite priority advantage
topic Agricultural Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8071076/
https://www.ncbi.nlm.nih.gov/pubmed/33981489
http://dx.doi.org/10.7717/peerj.11119
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