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Anastomosis within and between networks of Rhizophagus irregularis is differentially influenced by fungicides

Arbuscular mycorrhizal (AM) fungi play key roles in soil fertility of agroecosystems. They develop dense extraradical mycelial (ERM) networks via mechanisms such as hyphal anastomosis. These connections between hyphae can be affected by agricultural practices such as the use of fungicides, but how t...

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Autores principales: Rodriguez-Morelos, Victor Hugo, Calonne-Salmon, Maryline, Declerck, Stéphane
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9938072/
https://www.ncbi.nlm.nih.gov/pubmed/36680651
http://dx.doi.org/10.1007/s00572-023-01103-x
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author Rodriguez-Morelos, Victor Hugo
Calonne-Salmon, Maryline
Declerck, Stéphane
author_facet Rodriguez-Morelos, Victor Hugo
Calonne-Salmon, Maryline
Declerck, Stéphane
author_sort Rodriguez-Morelos, Victor Hugo
collection PubMed
description Arbuscular mycorrhizal (AM) fungi play key roles in soil fertility of agroecosystems. They develop dense extraradical mycelial (ERM) networks via mechanisms such as hyphal anastomosis. These connections between hyphae can be affected by agricultural practices such as the use of fungicides, but how these compounds affect anastomosis formation within and more importantly between networks of the same AM fungal strain remains poorly unexplored. Here, the impact of azoxystrobin, pencycuron, flutolanil, and fenpropimorph at 0.02 and 2 mg L(−1) were tested in vitro on the anastomosis formation within and between networks of Rhizophagus irregularis MUCL 41833. Azoxystrobin and fenpropimorph had a particularly detrimental impact, at the highest concentration (2 mg L(−1)), on the number of anastomoses within and between networks, and for fenpropimorph in particular at both concentrations (0.02 and 2 mg L(−1)) on the number of anastomoses per length of hyphae. Curiously fenpropimorph at 0.02 mg L(−1) significantly stimulated spore production, while with azoxystrobin, the reverse was observed at 2 mg L(−1). The two other fungicides, pencycuron and flutolanil, had no detrimental effects on spore production or anastomosis formation within and between networks. These results suggest that fungicides with different modes of action and concentrations differentially affect anastomosis possibly by altering the hyphal tips of AM fungi and may thus affect the capacity of AM fungi to develop large hyphal networks exploring and exploiting the soil at the service of plants.
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spelling pubmed-99380722023-02-19 Anastomosis within and between networks of Rhizophagus irregularis is differentially influenced by fungicides Rodriguez-Morelos, Victor Hugo Calonne-Salmon, Maryline Declerck, Stéphane Mycorrhiza Brief Report Arbuscular mycorrhizal (AM) fungi play key roles in soil fertility of agroecosystems. They develop dense extraradical mycelial (ERM) networks via mechanisms such as hyphal anastomosis. These connections between hyphae can be affected by agricultural practices such as the use of fungicides, but how these compounds affect anastomosis formation within and more importantly between networks of the same AM fungal strain remains poorly unexplored. Here, the impact of azoxystrobin, pencycuron, flutolanil, and fenpropimorph at 0.02 and 2 mg L(−1) were tested in vitro on the anastomosis formation within and between networks of Rhizophagus irregularis MUCL 41833. Azoxystrobin and fenpropimorph had a particularly detrimental impact, at the highest concentration (2 mg L(−1)), on the number of anastomoses within and between networks, and for fenpropimorph in particular at both concentrations (0.02 and 2 mg L(−1)) on the number of anastomoses per length of hyphae. Curiously fenpropimorph at 0.02 mg L(−1) significantly stimulated spore production, while with azoxystrobin, the reverse was observed at 2 mg L(−1). The two other fungicides, pencycuron and flutolanil, had no detrimental effects on spore production or anastomosis formation within and between networks. These results suggest that fungicides with different modes of action and concentrations differentially affect anastomosis possibly by altering the hyphal tips of AM fungi and may thus affect the capacity of AM fungi to develop large hyphal networks exploring and exploiting the soil at the service of plants. Springer Berlin Heidelberg 2023-01-21 2023 /pmc/articles/PMC9938072/ /pubmed/36680651 http://dx.doi.org/10.1007/s00572-023-01103-x Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Brief Report
Rodriguez-Morelos, Victor Hugo
Calonne-Salmon, Maryline
Declerck, Stéphane
Anastomosis within and between networks of Rhizophagus irregularis is differentially influenced by fungicides
title Anastomosis within and between networks of Rhizophagus irregularis is differentially influenced by fungicides
title_full Anastomosis within and between networks of Rhizophagus irregularis is differentially influenced by fungicides
title_fullStr Anastomosis within and between networks of Rhizophagus irregularis is differentially influenced by fungicides
title_full_unstemmed Anastomosis within and between networks of Rhizophagus irregularis is differentially influenced by fungicides
title_short Anastomosis within and between networks of Rhizophagus irregularis is differentially influenced by fungicides
title_sort anastomosis within and between networks of rhizophagus irregularis is differentially influenced by fungicides
topic Brief Report
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9938072/
https://www.ncbi.nlm.nih.gov/pubmed/36680651
http://dx.doi.org/10.1007/s00572-023-01103-x
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