Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and light
Abstract Light affects the cellular iron (Fe) requirement of phytoplankton because of its presence in major photosynthetic proteins. Thus, interactions between variable Fe concentrations and light intensities could restrict photosynthetic carbon fixation in the ocean. Here we show a narrowing of the...
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Limnology and Oceanography Letters |
| Online Access: | https://doi.org/10.1002/lol2.10441 |
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| _version_ | 1832592125672292352 |
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| author | Xin Zhang William G. Sunda Haizheng Hong Dalin Shi |
| author_facet | Xin Zhang William G. Sunda Haizheng Hong Dalin Shi |
| author_sort | Xin Zhang |
| collection | DOAJ |
| description | Abstract Light affects the cellular iron (Fe) requirement of phytoplankton because of its presence in major photosynthetic proteins. Thus, interactions between variable Fe concentrations and light intensities could restrict photosynthetic carbon fixation in the ocean. Here we show a narrowing of the optimal light range for growth of a marine cyanobacterium, Prochlorococcus strain NATL1A, a member of LLI ecotype, under Fe limitation. The response of the cells to variations in Fe and light involved differential changes in the cellular content of low‐Fe photosystem II (PSII) and Fe‐rich photosystem I (PSI), and associated up to 23‐fold changes in PSII : PSI ratios, showing an unprecedented extreme plasticity of the photosynthetic apparatus. Our study demonstrated the physiological effects of Fe and light interactions on this low‐light‐adapted Prochlorococcus strain, and increases our understanding of the reasons for the wide distribution of this and possibly other Prochlorococcus strains in the ocean. |
| format | Article |
| id | doaj-art-1995cc154e5449f2830affbd82d14b9f |
| institution | Kabale University |
| issn | 2378-2242 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Limnology and Oceanography Letters |
| spelling | doaj-art-1995cc154e5449f2830affbd82d14b9f2025-01-21T13:51:57ZengWileyLimnology and Oceanography Letters2378-22422025-02-01101829010.1002/lol2.10441Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and lightXin Zhang0William G. Sunda1Haizheng Hong2Dalin Shi3State Key Laboratory of Marine Environmental Science Xiamen University Xiamen ChinaDepartment of Marine Sciences University of North Carolina at Chapel Hill Chapel Hill North Carolina USAState Key Laboratory of Marine Environmental Science Xiamen University Xiamen ChinaState Key Laboratory of Marine Environmental Science Xiamen University Xiamen ChinaAbstract Light affects the cellular iron (Fe) requirement of phytoplankton because of its presence in major photosynthetic proteins. Thus, interactions between variable Fe concentrations and light intensities could restrict photosynthetic carbon fixation in the ocean. Here we show a narrowing of the optimal light range for growth of a marine cyanobacterium, Prochlorococcus strain NATL1A, a member of LLI ecotype, under Fe limitation. The response of the cells to variations in Fe and light involved differential changes in the cellular content of low‐Fe photosystem II (PSII) and Fe‐rich photosystem I (PSI), and associated up to 23‐fold changes in PSII : PSI ratios, showing an unprecedented extreme plasticity of the photosynthetic apparatus. Our study demonstrated the physiological effects of Fe and light interactions on this low‐light‐adapted Prochlorococcus strain, and increases our understanding of the reasons for the wide distribution of this and possibly other Prochlorococcus strains in the ocean.https://doi.org/10.1002/lol2.10441 |
| spellingShingle | Xin Zhang William G. Sunda Haizheng Hong Dalin Shi Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and light Limnology and Oceanography Letters |
| title | Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and light |
| title_full | Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and light |
| title_fullStr | Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and light |
| title_full_unstemmed | Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and light |
| title_short | Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and light |
| title_sort | extreme plasticity in the photosystem composition of a low light prochlorococcus ecotype in response to iron and light |
| url | https://doi.org/10.1002/lol2.10441 |
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