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| Format: | Artículo científico |
| Language: | en |
| Published: |
Journal of photochemistry and photobiology. B, Biology
2026
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/42096980/ |
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| _version_ | 1868266051114893312 |
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| author | Lintner, Michael Golen, Jan Schagerl, Michael Wildner, Manfred Wanek, Wolfgang Cyran, Norbert Tyszka, Jaroslaw |
| author_facet | Lintner, Michael Golen, Jan Schagerl, Michael Wildner, Manfred Wanek, Wolfgang Cyran, Norbert Tyszka, Jaroslaw Lintner, Michael Golen, Jan Schagerl, Michael Wildner, Manfred Wanek, Wolfgang Cyran, Norbert Tyszka, Jaroslaw |
| collection | PubMed - marine biology |
| contents | Reversible bleaching of photobionts in marine protists to a chemical stress - A case study of Amphistegina lobifera. Lintner, Michael Golen, Jan Schagerl, Michael Wildner, Manfred Wanek, Wolfgang Cyran, Norbert Tyszka, Jaroslaw Symbiosis Foraminifera Menthol Stress, Physiological Bleaching in symbiont-bearing organisms has been a topic of frequent discussion for years. The most prominent example in the marine environment is coral bleaching, which is associated with the loss of symbionts due to various environmental stressors. Other symbiont-bearing organisms that can be affected by bleaching include Foraminifera (protists). We investigated controlled bleaching in the foraminifera Amphistegina lobifera under laboratory conditions using the menthol/DCMU method to inactivate their obligate photobionts. Specimens were incubated for 35 days and regularly monitored by fluorescence, isotopic uptake, transmission electron microscopy, Pulse-Amplitude-Modulation Fluorometry, and visible and near-infrared spectroscopy. Symbiont metabolic activity decreased steadily with increasing incubation time. Although symbionts were inactive towards the end of the bleaching period, they were neither expelled nor degraded at the subcellular level. Reinoculation of bleached foraminifera with other algae was not possible. Instead, the bleached foraminifera and their original photobionts fully recovered after menthol/DCMU was no longer provided to the culture medium. These results suggest that bleaching cannot be equated to loss of photobionts in A. lobifera. Under the laboratory conditions provided, it is a reversible process, providing positive feedback that bleaching is also reversible under natural conditions if the organisms are only briefly in contact with the disruptive factor. |
| format | Artículo científico |
| id | pubmed_42096980 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Journal of photochemistry and photobiology. B, Biology |
| record_format | pubmed |
| spellingShingle | Reversible bleaching of photobionts in marine protists to a chemical stress - A case study of Amphistegina lobifera. Lintner, Michael Golen, Jan Schagerl, Michael Wildner, Manfred Wanek, Wolfgang Cyran, Norbert Tyszka, Jaroslaw Symbiosis Foraminifera Menthol Stress, Physiological Reversible bleaching of photobionts in marine protists to a chemical stress - A case study of Amphistegina lobifera. Lintner, Michael Golen, Jan Schagerl, Michael Wildner, Manfred Wanek, Wolfgang Cyran, Norbert Tyszka, Jaroslaw Symbiosis Foraminifera Menthol Stress, Physiological Bleaching in symbiont-bearing organisms has been a topic of frequent discussion for years. The most prominent example in the marine environment is coral bleaching, which is associated with the loss of symbionts due to various environmental stressors. Other symbiont-bearing organisms that can be affected by bleaching include Foraminifera (protists). We investigated controlled bleaching in the foraminifera Amphistegina lobifera under laboratory conditions using the menthol/DCMU method to inactivate their obligate photobionts. Specimens were incubated for 35 days and regularly monitored by fluorescence, isotopic uptake, transmission electron microscopy, Pulse-Amplitude-Modulation Fluorometry, and visible and near-infrared spectroscopy. Symbiont metabolic activity decreased steadily with increasing incubation time. Although symbionts were inactive towards the end of the bleaching period, they were neither expelled nor degraded at the subcellular level. Reinoculation of bleached foraminifera with other algae was not possible. Instead, the bleached foraminifera and their original photobionts fully recovered after menthol/DCMU was no longer provided to the culture medium. These results suggest that bleaching cannot be equated to loss of photobionts in A. lobifera. Under the laboratory conditions provided, it is a reversible process, providing positive feedback that bleaching is also reversible under natural conditions if the organisms are only briefly in contact with the disruptive factor. |
| title | Reversible bleaching of photobionts in marine protists to a chemical stress - A case study of Amphistegina lobifera. |
| topic | Symbiosis Foraminifera Menthol Stress, Physiological |
| url | https://pubmed.ncbi.nlm.nih.gov/42096980/ |