Article: Comparison of D1´â and D1âcontaining PS II reaction centre complexes under different environmental conditions in Synechocystis sp. PCC 6803
Plant, cell and environment. 2016 Aug., v. 39, no. 8
2016
Abstract: In oxygenic photosynthesis, the D1 protein of Photosystem II is the primary target of photodamage and environmental stress can accelerate this process. The cyanobacterial response to stress includes transcriptional regulation of genes encoding D1, ... ...
| Abstract | In oxygenic photosynthesis, the D1 protein of Photosystem II is the primary target of photodamage and environmental stress can accelerate this process. The cyanobacterial response to stress includes transcriptional regulation of genes encoding D1, including lowâoxygenâinduction of psbA1 encoding the D1´ protein in Synechocystis sp. PCC 6803. The psbA1 gene is also transiently upâregulated in high light, and its deletion has been reported to increase ammoniumâinduced photoinhibition. Therefore we investigated the role of D1´âcontaining PS II centres under different environmental conditions. A strain containing only D1´âPS II centres under aerobic conditions exhibited increased sensitivity to ammonium chloride and high light compared to a D1âcontaining strain. Additionally a D1´âPS II strain was outperformed by a D1âPS II strain under normal conditions; however, a strain containing lowâoxygenâinduced D1´âPS II centres was more resilient under high light than an equivalent D1 strain. These D1´âcontaining centres had chlorophyll a fluorescence characteristics indicative of altered forward electron transport and back charge recombination with the donor side of PS II. Our results indicate D1´âPS II centres are important in the reconfiguration of thylakoid electron transport in response to high light and low oxygen. |
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| Keywords | aerobic conditions ; ammonium chloride ; chlorophyll ; D1 protein ; electron transfer ; fluorescence ; gene expression regulation ; genes ; oxygen ; photoinhibition ; photosystem II ; stress response ; Synechocystis ; thylakoids ; transcription (genetics) | |||||
| Language | English | |||||
| Dates of publication | 2016-08 | |||||
| Size | p. 1715-1726. | |||||
| Publishing place | John Wiley & Sons, Ltd | |||||
| Document type | Article | |||||
| Note | JOURNAL ARTICLE | |||||
| ZDB-ID | 391893-2 | |||||
| ISSN | 1365-3040 ; 0140-7791 | |||||
| ISSN (online) | 1365-3040 | |||||
| ISSN | 0140-7791 | |||||
| DOI | 10.1111/pce.12738 | |||||
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| Database | NAL-Catalogue (AGRICOLA) |
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