Lipid degradation and photosynthetic traits after prolonged darkness in four Antarctic benthic diatoms, including the newly described species Planothidium wetzelii sp. nov. Article Swipe
Desirée Juchem
,
Katherina Schimani
,
Andreas Holzinger
,
Charlotte Permann
,
Nélida Abarca
,
Oliver Skibbe
,
Jonas Zimmermann
,
Martin Graeve
,
Ulf Karsten
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.3389/fmicb.2023.1241826
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.3389/fmicb.2023.1241826
In polar regions, the microphytobenthos has important ecological functions in shallow-water habitats, such as on top of coastal sediments. This community is dominated by benthic diatoms, which contribute significantly to primary production and biogeochemical cycling while also being an important component of polar food webs. Polar diatoms are able to cope with markedly changing light conditions and prolonged periods of darkness during the polar night in Antarctica. However, the underlying mechanisms are poorly understood. In this study, five strains of Antarctic benthic diatoms were isolated in the field, and the resulting unialgal cultures were identified as four distinct species, of which one is described as a new species, Planothidium wetzelii sp. nov. All four species were thoroughly examined using physiological, cell biological, and biochemical methods over a fully controlled dark period of 3 months. The results showed that the utilization of storage lipids is one of the key mechanisms in Antarctic benthic diatoms to survive the polar night, although different fatty acids were involved in the investigated taxa. In all tested species, the storage lipid content declined significantly, along with an ultrastructurally observable degradation of the chloroplasts. Surprisingly, photosynthetic performance did not change significantly despite chloroplasts decreasing in thylakoid membranes and an increased number of plastoglobules. Thus, a combination of biochemical and cell biological mechanisms allows Antarctic benthic diatoms to survive the polar night.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3389/fmicb.2023.1241826
- OA Status
- gold
- Cited By
- 5
- References
- 77
- Related Works
- 10
- OpenAlex ID
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All OpenAlex metadata
Raw OpenAlex JSON
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https://openalex.org/W4386326459Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3389/fmicb.2023.1241826Digital Object Identifier
- Title
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Lipid degradation and photosynthetic traits after prolonged darkness in four Antarctic benthic diatoms, including the newly described species Planothidium wetzelii sp. nov.Work title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2023Year of publication
- Publication date
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2023-08-31Full publication date if available
- Authors
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Desirée Juchem, Katherina Schimani, Andreas Holzinger, Charlotte Permann, Nélida Abarca, Oliver Skibbe, Jonas Zimmermann, Martin Graeve, Ulf KarstenList of authors in order
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https://doi.org/10.3389/fmicb.2023.1241826Publisher landing page
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YesWhether a free full text is available
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goldOpen access status per OpenAlex
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https://doi.org/10.3389/fmicb.2023.1241826Direct OA link when available
- Concepts
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Benthic zone, Biology, Biogeochemical cycle, Photosynthesis, Ecology, Algae, Thylakoid, Botany, Darkness, Chloroplast, Gene, BiochemistryTop concepts (fields/topics) attached by OpenAlex
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5Total citation count in OpenAlex
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2025: 1, 2024: 3, 2023: 1Per-year citation counts (last 5 years)
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10Other works algorithmically related by OpenAlex
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