Changes of Photosystem II Electron Transport in the Chlorophyll-deficient Oilseed Rape Mutant Studied by Chlorophyll Fluorescence and Thermoluminescence
| العنوان: | Changes of Photosystem II Electron Transport in the Chlorophyll-deficient Oilseed Rape Mutant Studied by Chlorophyll Fluorescence and Thermoluminescence |
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| المؤلفون: | Yun Zhao, Jinkui Guo, Jun-Wei Guo, Lin-Fang Du |
| المصدر: | Journal of Integrative Plant Biology. 49:698-705 |
| بيانات النشر: | Wiley, 2007. |
| سنة النشر: | 2007 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Photosystem II, Chemistry, Light-harvesting complexes of green plants, Plant Science, Electron acceptor, Photochemistry, Photosynthesis, Biochemistry, Electron transport chain, Acceptor, General Biochemistry, Genetics and Molecular Biology, chemistry.chemical_compound, Chlorophyll, Botany, Chlorophyll fluorescence |
| الوصف: | The photosystem II (PSII) complex of photosynthetic membranes comprises a number of chlorophyll-binding proteins that are important to the electron flow. Here we report that the chlorophyll b-deficient mutant has decreased the amount of light-harvesting complexes with an increased amount of some core polypeptides of PSII, including CP43 and CP47. By means of chlorophyll fluorescence and thermoluminescence, we found that the ratio of Fv/Fm, qP and electron transport rate in the chlorophyll b-deficient mutant was higher compared to the wild type. In the chlorophyll b-deficient mutant, the decay of the primary electron acceptor quinones (QA−) reoxidation was decreased, measured by the fluorescence. Furthermore, the thermoluminescence studies in the chlorophyll b-deficient mutant showed that the B band (S2/S3QB−) decreased slightly and shifted up towards higher temperatures. In the presence of dichlorophenyl-dimethylurea, which is inhibited in the electron flow to the second electron acceptor quinines (QB) at the PSII acceptor side, the maximum of the Q band (S2QA−) was decreased slightly and shifted down to lower temperatures, compared to the wild type. Thus, the electron flow within PSII of the chlorophyll b-deficient mutant was down-regulated and characterized by faster oxidation of the primary electron acceptor quinine QA− via forward electron flow and slower reduction of the oxidation S states. (Handling editor: Li-Xin Zhang) |
| تدمد: | 1744-7909 1672-9072 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::cf682b92a07d737076dbf015f7462c22 https://doi.org/10.1111/j.1744-7909.2007.00441.x |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........cf682b92a07d737076dbf015f7462c22 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 17447909 16729072 |
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