Saprolegnia diclina IIIA and S. parasitica employ different infection strategies when colonizing eggs of Atlantic salmon, Salmo salar L.
Abstract Here, we address the morphological changes of eyed eggs of Atlantic salmon, Salmo salar L. infected with Saprolegnia from a commercial hatchery and after experimental infection. Eyed eggs infected with Saprolegnia spp. from 10 Atlantic salmon females were obtained. Egg pathology was investi...
Published in: | Journal of Fish Diseases |
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crwiley:10.1111/jfd.12368 2024-09-15T17:55:59+00:00 Saprolegnia diclina IIIA and S. parasitica employ different infection strategies when colonizing eggs of Atlantic salmon, Salmo salar L. Songe, M M Willems, A Wiik‐Nielsen, J Thoen, E Evensen, Ø van West, P Skaar, I European Commission Biotechnology and Biological Sciences Research Council University of Aberdeen 2015 http://dx.doi.org/10.1111/jfd.12368 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfd.12368 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfd.12368 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jfd.12368 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Journal of Fish Diseases volume 39, issue 3, page 343-352 ISSN 0140-7775 1365-2761 journal-article 2015 crwiley https://doi.org/10.1111/jfd.12368 2024-09-05T05:08:00Z Abstract Here, we address the morphological changes of eyed eggs of Atlantic salmon, Salmo salar L. infected with Saprolegnia from a commercial hatchery and after experimental infection. Eyed eggs infected with Saprolegnia spp. from 10 Atlantic salmon females were obtained. Egg pathology was investigated by light and scanning electron microscopy. Eggs from six of ten females were infected with S. parasitica , and two females had infections with S. diclina clade IIIA two Saprolegnia isolates remained unidentified. Light microscopy showed S. diclina infection resulted in the chorion in some areas being completely destroyed, whereas eggs infected with S. parasitica had an apparently intact chorion with hyphae growing within or beneath the chorion. The same contrasting pathology was found in experimentally infected eggs. Scanning electron microscopy revealed that S . parasitica grew on the egg surface and hyphae were found penetrating the chorion of the egg, and re‐emerging on the surface away from the infection site. The two Saprolegnia species employ different infection strategies when colonizing salmon eggs. Saprolegnia diclina infection results in chorion destruction, while S. parasitica penetrates intact chorion. We discuss the possibility these infection mechanisms representing a necrotrophic ( S. diclina ) vs. a facultative biotrophic strategy ( S. parasitica ). Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Fish Diseases 39 3 343 352 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Here, we address the morphological changes of eyed eggs of Atlantic salmon, Salmo salar L. infected with Saprolegnia from a commercial hatchery and after experimental infection. Eyed eggs infected with Saprolegnia spp. from 10 Atlantic salmon females were obtained. Egg pathology was investigated by light and scanning electron microscopy. Eggs from six of ten females were infected with S. parasitica , and two females had infections with S. diclina clade IIIA two Saprolegnia isolates remained unidentified. Light microscopy showed S. diclina infection resulted in the chorion in some areas being completely destroyed, whereas eggs infected with S. parasitica had an apparently intact chorion with hyphae growing within or beneath the chorion. The same contrasting pathology was found in experimentally infected eggs. Scanning electron microscopy revealed that S . parasitica grew on the egg surface and hyphae were found penetrating the chorion of the egg, and re‐emerging on the surface away from the infection site. The two Saprolegnia species employ different infection strategies when colonizing salmon eggs. Saprolegnia diclina infection results in chorion destruction, while S. parasitica penetrates intact chorion. We discuss the possibility these infection mechanisms representing a necrotrophic ( S. diclina ) vs. a facultative biotrophic strategy ( S. parasitica ). |
author2 |
European Commission Biotechnology and Biological Sciences Research Council University of Aberdeen |
format |
Article in Journal/Newspaper |
author |
Songe, M M Willems, A Wiik‐Nielsen, J Thoen, E Evensen, Ø van West, P Skaar, I |
spellingShingle |
Songe, M M Willems, A Wiik‐Nielsen, J Thoen, E Evensen, Ø van West, P Skaar, I Saprolegnia diclina IIIA and S. parasitica employ different infection strategies when colonizing eggs of Atlantic salmon, Salmo salar L. |
author_facet |
Songe, M M Willems, A Wiik‐Nielsen, J Thoen, E Evensen, Ø van West, P Skaar, I |
author_sort |
Songe, M M |
title |
Saprolegnia diclina IIIA and S. parasitica employ different infection strategies when colonizing eggs of Atlantic salmon, Salmo salar L. |
title_short |
Saprolegnia diclina IIIA and S. parasitica employ different infection strategies when colonizing eggs of Atlantic salmon, Salmo salar L. |
title_full |
Saprolegnia diclina IIIA and S. parasitica employ different infection strategies when colonizing eggs of Atlantic salmon, Salmo salar L. |
title_fullStr |
Saprolegnia diclina IIIA and S. parasitica employ different infection strategies when colonizing eggs of Atlantic salmon, Salmo salar L. |
title_full_unstemmed |
Saprolegnia diclina IIIA and S. parasitica employ different infection strategies when colonizing eggs of Atlantic salmon, Salmo salar L. |
title_sort |
saprolegnia diclina iiia and s. parasitica employ different infection strategies when colonizing eggs of atlantic salmon, salmo salar l. |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1111/jfd.12368 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfd.12368 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfd.12368 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jfd.12368 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Diseases volume 39, issue 3, page 343-352 ISSN 0140-7775 1365-2761 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/jfd.12368 |
container_title |
Journal of Fish Diseases |
container_volume |
39 |
container_issue |
3 |
container_start_page |
343 |
op_container_end_page |
352 |
_version_ |
1810432195552083968 |