Photorespiration: The Futile Cycle?
Photorespiration, or C<sub>2</sub> photosynthesis, is generally considered a futile cycle that potentially decreases photosynthetic carbon fixation by more than 25%. Nonetheless, many essential processes, such as nitrogen assimilation, C<sub>1</sub> metabolism, and sulfur ass...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Plants |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2223-7747/10/5/908 |
| _version_ | 1797535508443693056 |
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| author | Xiaoxiao Shi Arnold Bloom |
| author_facet | Xiaoxiao Shi Arnold Bloom |
| author_sort | Xiaoxiao Shi |
| collection | DOAJ |
| description | Photorespiration, or C<sub>2</sub> photosynthesis, is generally considered a futile cycle that potentially decreases photosynthetic carbon fixation by more than 25%. Nonetheless, many essential processes, such as nitrogen assimilation, C<sub>1</sub> metabolism, and sulfur assimilation, depend on photorespiration. Most studies of photosynthetic and photorespiratory reactions are conducted with magnesium as the sole metal cofactor despite many of the enzymes involved in these reactions readily associating with manganese. Indeed, when manganese is present, the energy efficiency of these reactions may improve. This review summarizes some commonly used methods to quantify photorespiration, outlines the influence of metal cofactors on photorespiratory enzymes, and discusses why photorespiration may not be as wasteful as previously believed. |
| first_indexed | 2024-03-10T11:45:42Z |
| format | Article |
| id | doaj.art-d8b2463373eb4b79bf595560b14fbcad |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-10T11:45:42Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-d8b2463373eb4b79bf595560b14fbcad2023-11-21T18:06:14ZengMDPI AGPlants2223-77472021-05-0110590810.3390/plants10050908Photorespiration: The Futile Cycle?Xiaoxiao Shi0Arnold Bloom1Department of Plant Sciences, University of California Davis, Davis, CA 95616, USADepartment of Plant Sciences, University of California Davis, Davis, CA 95616, USAPhotorespiration, or C<sub>2</sub> photosynthesis, is generally considered a futile cycle that potentially decreases photosynthetic carbon fixation by more than 25%. Nonetheless, many essential processes, such as nitrogen assimilation, C<sub>1</sub> metabolism, and sulfur assimilation, depend on photorespiration. Most studies of photosynthetic and photorespiratory reactions are conducted with magnesium as the sole metal cofactor despite many of the enzymes involved in these reactions readily associating with manganese. Indeed, when manganese is present, the energy efficiency of these reactions may improve. This review summarizes some commonly used methods to quantify photorespiration, outlines the influence of metal cofactors on photorespiratory enzymes, and discusses why photorespiration may not be as wasteful as previously believed.https://www.mdpi.com/2223-7747/10/5/908photorespirationoxygenationphotosynthesismetal cofactoratmospheric CO<sub>2</sub>climate change |
| spellingShingle | Xiaoxiao Shi Arnold Bloom Photorespiration: The Futile Cycle? Plants photorespiration oxygenation photosynthesis metal cofactor atmospheric CO<sub>2</sub> climate change |
| title | Photorespiration: The Futile Cycle? |
| title_full | Photorespiration: The Futile Cycle? |
| title_fullStr | Photorespiration: The Futile Cycle? |
| title_full_unstemmed | Photorespiration: The Futile Cycle? |
| title_short | Photorespiration: The Futile Cycle? |
| title_sort | photorespiration the futile cycle |
| topic | photorespiration oxygenation photosynthesis metal cofactor atmospheric CO<sub>2</sub> climate change |
| url | https://www.mdpi.com/2223-7747/10/5/908 |
| work_keys_str_mv | AT xiaoxiaoshi photorespirationthefutilecycle AT arnoldbloom photorespirationthefutilecycle |