Effects of environmental parameters on chytrid infection prevalence of four marine diatoms : a laboratory case study
The influence of environmental factors on the infection susceptibility of four different marine diatom host species to chytrid infection was tested under laboratory conditions, using host and parasite isolates obtained from diverse coastal areas in north-west Iceland in 2015. Specifically, a total o...
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ftunivgent:oai:archive.ugent.be:8544340 2023-06-11T04:13:16+02:00 Effects of environmental parameters on chytrid infection prevalence of four marine diatoms : a laboratory case study Scholz, Bettina Vyverman, Wim Küpper, Frithjof C Ólafsson, Halldór G Karsten, Ulf 2017 application/pdf https://biblio.ugent.be/publication/8544340 http://hdl.handle.net/1854/LU-8544340 https://doi.org/10.1515/bot-2016-0105 https://biblio.ugent.be/publication/8544340/file/8556940 eng eng https://biblio.ugent.be/publication/8544340 http://hdl.handle.net/1854/LU-8544340 http://dx.doi.org/10.1515/bot-2016-0105 https://biblio.ugent.be/publication/8544340/file/8556940 No license (in copyright) info:eu-repo/semantics/restrictedAccess BOTANICA MARINA ISSN: 0006-8055 ISSN: 1437-4323 Biology and Life Sciences chytrids marine diatoms parasite-host dual cultures proline concentrations stress physiology EUKARYOTIC PATHOGENS CHYTRIDIOMYCOTA SOUTHERN NORTH-SEA PLANKTONICUM CANTER NITZSCHIA-PUNGENS FUNGAL PARASITISM ACID-COMPOSITION AMINO-ACID ASTERIONELLA HOST BACILLARIOPHYCEAE journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2017 ftunivgent https://doi.org/10.1515/bot-2016-0105 2023-05-10T22:29:06Z The influence of environmental factors on the infection susceptibility of four different marine diatom host species to chytrid infection was tested under laboratory conditions, using host and parasite isolates obtained from diverse coastal areas in north-west Iceland in 2015. Specifically, a total of 120 monoclonal marine diatom host cultures of Navicula, Nitzschia, Rhizosolenia and Chaetoceros were exposed to their chytrid parasites Chytridium type I and Rhizophydium type I and II in Hellendahl glass staining jars which were subdivided in two compartments by nylon filters (mesh size 5 mu m). Infection densities were assessed at different temperatures (5, 15, 20 degrees C), salinities (0, 5, 10, 20, 40), photon fluence rates (PFR; 10, 50, 100, 200 mu mol photons m(-2) s(-1)) and photoperiods (24 h dark, 8: 16 h, 16: 8 h light: dark and 24 h light) after 168 h exposure, using the one-factor-at-a-time method. In addition, growth rates and proline concentrations of the noninfected monoclonal host cultures were determined. In most cases, decreasing growth rates during the acclimatisation process to abiotic stressors were directly related to increases of proline in the host cells. Significant positive associations of infection densities to cell based proline concentrations were predominantly observed in the high-PFR assays and 24-h daylight treatments. At least for half of the tested host-parasite pairs, positive correlations of proline and parasite prevalence were found. In addition, chytrid abundance was also positively correlated with host densities of Navicula sp., Rhizosolenia sp. and Chaetoceros sp. Only in Nitzschia sp., was parasite density negatively associated with proline and showed no significant relationship to host densities, suggesting that other physiological/biochemical factors related to stress might have an impact on the susceptibility of this peculiar host diatom species. Article in Journal/Newspaper Iceland Ghent University Academic Bibliography Botanica Marina 60 4 |
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Open Polar |
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Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences chytrids marine diatoms parasite-host dual cultures proline concentrations stress physiology EUKARYOTIC PATHOGENS CHYTRIDIOMYCOTA SOUTHERN NORTH-SEA PLANKTONICUM CANTER NITZSCHIA-PUNGENS FUNGAL PARASITISM ACID-COMPOSITION AMINO-ACID ASTERIONELLA HOST BACILLARIOPHYCEAE |
spellingShingle |
Biology and Life Sciences chytrids marine diatoms parasite-host dual cultures proline concentrations stress physiology EUKARYOTIC PATHOGENS CHYTRIDIOMYCOTA SOUTHERN NORTH-SEA PLANKTONICUM CANTER NITZSCHIA-PUNGENS FUNGAL PARASITISM ACID-COMPOSITION AMINO-ACID ASTERIONELLA HOST BACILLARIOPHYCEAE Scholz, Bettina Vyverman, Wim Küpper, Frithjof C Ólafsson, Halldór G Karsten, Ulf Effects of environmental parameters on chytrid infection prevalence of four marine diatoms : a laboratory case study |
topic_facet |
Biology and Life Sciences chytrids marine diatoms parasite-host dual cultures proline concentrations stress physiology EUKARYOTIC PATHOGENS CHYTRIDIOMYCOTA SOUTHERN NORTH-SEA PLANKTONICUM CANTER NITZSCHIA-PUNGENS FUNGAL PARASITISM ACID-COMPOSITION AMINO-ACID ASTERIONELLA HOST BACILLARIOPHYCEAE |
description |
The influence of environmental factors on the infection susceptibility of four different marine diatom host species to chytrid infection was tested under laboratory conditions, using host and parasite isolates obtained from diverse coastal areas in north-west Iceland in 2015. Specifically, a total of 120 monoclonal marine diatom host cultures of Navicula, Nitzschia, Rhizosolenia and Chaetoceros were exposed to their chytrid parasites Chytridium type I and Rhizophydium type I and II in Hellendahl glass staining jars which were subdivided in two compartments by nylon filters (mesh size 5 mu m). Infection densities were assessed at different temperatures (5, 15, 20 degrees C), salinities (0, 5, 10, 20, 40), photon fluence rates (PFR; 10, 50, 100, 200 mu mol photons m(-2) s(-1)) and photoperiods (24 h dark, 8: 16 h, 16: 8 h light: dark and 24 h light) after 168 h exposure, using the one-factor-at-a-time method. In addition, growth rates and proline concentrations of the noninfected monoclonal host cultures were determined. In most cases, decreasing growth rates during the acclimatisation process to abiotic stressors were directly related to increases of proline in the host cells. Significant positive associations of infection densities to cell based proline concentrations were predominantly observed in the high-PFR assays and 24-h daylight treatments. At least for half of the tested host-parasite pairs, positive correlations of proline and parasite prevalence were found. In addition, chytrid abundance was also positively correlated with host densities of Navicula sp., Rhizosolenia sp. and Chaetoceros sp. Only in Nitzschia sp., was parasite density negatively associated with proline and showed no significant relationship to host densities, suggesting that other physiological/biochemical factors related to stress might have an impact on the susceptibility of this peculiar host diatom species. |
format |
Article in Journal/Newspaper |
author |
Scholz, Bettina Vyverman, Wim Küpper, Frithjof C Ólafsson, Halldór G Karsten, Ulf |
author_facet |
Scholz, Bettina Vyverman, Wim Küpper, Frithjof C Ólafsson, Halldór G Karsten, Ulf |
author_sort |
Scholz, Bettina |
title |
Effects of environmental parameters on chytrid infection prevalence of four marine diatoms : a laboratory case study |
title_short |
Effects of environmental parameters on chytrid infection prevalence of four marine diatoms : a laboratory case study |
title_full |
Effects of environmental parameters on chytrid infection prevalence of four marine diatoms : a laboratory case study |
title_fullStr |
Effects of environmental parameters on chytrid infection prevalence of four marine diatoms : a laboratory case study |
title_full_unstemmed |
Effects of environmental parameters on chytrid infection prevalence of four marine diatoms : a laboratory case study |
title_sort |
effects of environmental parameters on chytrid infection prevalence of four marine diatoms : a laboratory case study |
publishDate |
2017 |
url |
https://biblio.ugent.be/publication/8544340 http://hdl.handle.net/1854/LU-8544340 https://doi.org/10.1515/bot-2016-0105 https://biblio.ugent.be/publication/8544340/file/8556940 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
BOTANICA MARINA ISSN: 0006-8055 ISSN: 1437-4323 |
op_relation |
https://biblio.ugent.be/publication/8544340 http://hdl.handle.net/1854/LU-8544340 http://dx.doi.org/10.1515/bot-2016-0105 https://biblio.ugent.be/publication/8544340/file/8556940 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1515/bot-2016-0105 |
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Botanica Marina |
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60 |
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4 |
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1768390063384690688 |