The fish egg microbiome : diversity and activity against the oomycete pathogen Saprolegnia
Y. Liu Prof. dr. F. Govers (promotor); Prof. dr. J.M. Raaijmakers (promotor); Dr. I. de Bruijn (co-promotor); Wageningen University, 13 June 2016, 170 pp. The fish egg microbiome: diversity and activity against the oomycete pathogen Saprolegnia Emerging oomycete pathogens increasingly threaten biodi...
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ftunivwagenin:oai:library.wur.nl:wurpubs/504156 2024-02-11T10:02:12+01:00 The fish egg microbiome : diversity and activity against the oomycete pathogen Saprolegnia Liu, Y. 2016 application/pdf https://research.wur.nl/en/publications/the-fish-egg-microbiome-diversity-and-activity-against-the-oomyce https://doi.org/10.18174/377064 en eng Wageningen University https://edepot.wur.nl/377064 https://research.wur.nl/en/publications/the-fish-egg-microbiome-diversity-and-activity-against-the-oomyce doi:10.18174/377064 info:eu-repo/semantics/openAccess Wageningen University & Research bioinformatics fish diseases fish eggs fungal antagonists genomics marine microorganisms microbial diversity oomycota salmon saprolegnia suppression bio-informatica genomica mariene micro-organismen microbiële diversiteit onderdrukking oömycota schimmelantagonisten visseneieren visziekten zalm info:eu-repo/semantics/doctoralThesis Doctoral thesis info:eu-repo/semantics/publishedVersion 2016 ftunivwagenin https://doi.org/10.18174/377064 2024-01-17T23:47:12Z Y. Liu Prof. dr. F. Govers (promotor); Prof. dr. J.M. Raaijmakers (promotor); Dr. I. de Bruijn (co-promotor); Wageningen University, 13 June 2016, 170 pp. The fish egg microbiome: diversity and activity against the oomycete pathogen Saprolegnia Emerging oomycete pathogens increasingly threaten biodiversity and food security. This thesis describes the study of the microbiome of Atlantic salmon (Salmo salar L.) eggs and analyses of the effects of infections by the oomycete pathogen Saprolegnia on the microbial architecture. A low incidence of Saprolegniosis was correlated with a relatively high abundance and richness of specific commensal Actinobacteria. Among the bacterial community, the isolates Frondihabitans sp. 762G35 (Microbacteriaceae) and Pseudomonas sp. H6 significantly inhibited hyphal attachment of Saprolegnia diclina to live salmon eggs. Chemical profiling showed that these two isolates produce furancarboxylic acid-derived metabolites and a lipopeptide viscosin-like biosurfactant, respectively, which inhibited hyphal growth of S. diclina in vitro. Among the fungal community, the fungal isolates obtained from salmon eggs were closely related to Microdochium lycopodinum/Microdochium phragmitis and Trichoderma viride. Both a quantitative and qualitative difference in the Trichoderma population between Saprolegnia-infected and healthy salmon eggs was observed, which suggested that mycoparasitic Trichoderma species could play a role in Saprolegnia suppression in aquaculture. This research provides a scientific framework for studying the diversity and dynamics of microbial communities to mitigate emerging diseases. The Frondihabitans, Pseudomonas and Trichoderma isolates, and/or their bioactive metabolites, are proposed as effective candidates to control Saprolegniosis. Doctoral or Postdoctoral Thesis Atlantic salmon Salmo salar Wageningen UR (University & Research Centre): Digital Library |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
bioinformatics fish diseases fish eggs fungal antagonists genomics marine microorganisms microbial diversity oomycota salmon saprolegnia suppression bio-informatica genomica mariene micro-organismen microbiële diversiteit onderdrukking oömycota schimmelantagonisten visseneieren visziekten zalm |
spellingShingle |
bioinformatics fish diseases fish eggs fungal antagonists genomics marine microorganisms microbial diversity oomycota salmon saprolegnia suppression bio-informatica genomica mariene micro-organismen microbiële diversiteit onderdrukking oömycota schimmelantagonisten visseneieren visziekten zalm Liu, Y. The fish egg microbiome : diversity and activity against the oomycete pathogen Saprolegnia |
topic_facet |
bioinformatics fish diseases fish eggs fungal antagonists genomics marine microorganisms microbial diversity oomycota salmon saprolegnia suppression bio-informatica genomica mariene micro-organismen microbiële diversiteit onderdrukking oömycota schimmelantagonisten visseneieren visziekten zalm |
description |
Y. Liu Prof. dr. F. Govers (promotor); Prof. dr. J.M. Raaijmakers (promotor); Dr. I. de Bruijn (co-promotor); Wageningen University, 13 June 2016, 170 pp. The fish egg microbiome: diversity and activity against the oomycete pathogen Saprolegnia Emerging oomycete pathogens increasingly threaten biodiversity and food security. This thesis describes the study of the microbiome of Atlantic salmon (Salmo salar L.) eggs and analyses of the effects of infections by the oomycete pathogen Saprolegnia on the microbial architecture. A low incidence of Saprolegniosis was correlated with a relatively high abundance and richness of specific commensal Actinobacteria. Among the bacterial community, the isolates Frondihabitans sp. 762G35 (Microbacteriaceae) and Pseudomonas sp. H6 significantly inhibited hyphal attachment of Saprolegnia diclina to live salmon eggs. Chemical profiling showed that these two isolates produce furancarboxylic acid-derived metabolites and a lipopeptide viscosin-like biosurfactant, respectively, which inhibited hyphal growth of S. diclina in vitro. Among the fungal community, the fungal isolates obtained from salmon eggs were closely related to Microdochium lycopodinum/Microdochium phragmitis and Trichoderma viride. Both a quantitative and qualitative difference in the Trichoderma population between Saprolegnia-infected and healthy salmon eggs was observed, which suggested that mycoparasitic Trichoderma species could play a role in Saprolegnia suppression in aquaculture. This research provides a scientific framework for studying the diversity and dynamics of microbial communities to mitigate emerging diseases. The Frondihabitans, Pseudomonas and Trichoderma isolates, and/or their bioactive metabolites, are proposed as effective candidates to control Saprolegniosis. |
format |
Doctoral or Postdoctoral Thesis |
author |
Liu, Y. |
author_facet |
Liu, Y. |
author_sort |
Liu, Y. |
title |
The fish egg microbiome : diversity and activity against the oomycete pathogen Saprolegnia |
title_short |
The fish egg microbiome : diversity and activity against the oomycete pathogen Saprolegnia |
title_full |
The fish egg microbiome : diversity and activity against the oomycete pathogen Saprolegnia |
title_fullStr |
The fish egg microbiome : diversity and activity against the oomycete pathogen Saprolegnia |
title_full_unstemmed |
The fish egg microbiome : diversity and activity against the oomycete pathogen Saprolegnia |
title_sort |
fish egg microbiome : diversity and activity against the oomycete pathogen saprolegnia |
publisher |
Wageningen University |
publishDate |
2016 |
url |
https://research.wur.nl/en/publications/the-fish-egg-microbiome-diversity-and-activity-against-the-oomyce https://doi.org/10.18174/377064 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
https://edepot.wur.nl/377064 https://research.wur.nl/en/publications/the-fish-egg-microbiome-diversity-and-activity-against-the-oomyce doi:10.18174/377064 |
op_rights |
info:eu-repo/semantics/openAccess Wageningen University & Research |
op_doi |
https://doi.org/10.18174/377064 |
_version_ |
1790598117242961920 |