{"title":"光合控制及其在保护光系统I免受光抑制中的作用。","authors":"Daria V. Vilyanen, Marina A. Kozuleva","doi":"10.1134/S0006297925601121","DOIUrl":null,"url":null,"abstract":"<p>This review addresses photosynthetic control as a protective mechanism that prevents photoinhibition of photosystem I under conditions of imbalance between CO<sub>2</sub> assimilation during the Calvin–Benson–Bassham cycle and light reactions in the thylakoid photosynthetic apparatus. We discuss the pathways of photosystem I photoinhibition and describe protective mechanisms that prevent photodamage of photosystem I. We propose a hypothesis regarding the influence of photosynthetic control on formation of reactive oxygen species in photosystem I. pH-sensitivity of plastoquinol oxidation at the quinol-oxidizing (Qo) site of the cytochrome <i>b</i><sub>6</sub><i>f</i> complex is analyzed, and function of two proton-conducting channels that release protons into the thylakoid lumen from the cytochrome <i>b</i><sub>6</sub><i>f</i> complex is described. We examine impact of photosynthetic control on the functioning of the cytochrome <i>b</i><sub>6</sub><i>f</i> complex itself, and propose a hypothesis regarding the preferential activation of photosynthetic control in the thylakoid grana, which ensures operation of the cyclic electron transport around photosystem I as a main protective mechanism.</p>","PeriodicalId":483,"journal":{"name":"Biochemistry (Moscow)","volume":"90 )\nGuest","pages":"840 - 859"},"PeriodicalIF":2.2000,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Photosynthetic Control and Its Role in Protection of Photosystem I against Photoinhibition\",\"authors\":\"Daria V. Vilyanen, Marina A. Kozuleva\",\"doi\":\"10.1134/S0006297925601121\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>This review addresses photosynthetic control as a protective mechanism that prevents photoinhibition of photosystem I under conditions of imbalance between CO<sub>2</sub> assimilation during the Calvin–Benson–Bassham cycle and light reactions in the thylakoid photosynthetic apparatus. We discuss the pathways of photosystem I photoinhibition and describe protective mechanisms that prevent photodamage of photosystem I. We propose a hypothesis regarding the influence of photosynthetic control on formation of reactive oxygen species in photosystem I. pH-sensitivity of plastoquinol oxidation at the quinol-oxidizing (Qo) site of the cytochrome <i>b</i><sub>6</sub><i>f</i> complex is analyzed, and function of two proton-conducting channels that release protons into the thylakoid lumen from the cytochrome <i>b</i><sub>6</sub><i>f</i> complex is described. We examine impact of photosynthetic control on the functioning of the cytochrome <i>b</i><sub>6</sub><i>f</i> complex itself, and propose a hypothesis regarding the preferential activation of photosynthetic control in the thylakoid grana, which ensures operation of the cyclic electron transport around photosystem I as a main protective mechanism.</p>\",\"PeriodicalId\":483,\"journal\":{\"name\":\"Biochemistry (Moscow)\",\"volume\":\"90 )\\nGuest\",\"pages\":\"840 - 859\"},\"PeriodicalIF\":2.2000,\"publicationDate\":\"2025-07-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biochemistry (Moscow)\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0006297925601121\",\"RegionNum\":4,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"BIOCHEMISTRY & MOLECULAR BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biochemistry (Moscow)","FirstCategoryId":"99","ListUrlMain":"https://link.springer.com/article/10.1134/S0006297925601121","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
Photosynthetic Control and Its Role in Protection of Photosystem I against Photoinhibition
This review addresses photosynthetic control as a protective mechanism that prevents photoinhibition of photosystem I under conditions of imbalance between CO2 assimilation during the Calvin–Benson–Bassham cycle and light reactions in the thylakoid photosynthetic apparatus. We discuss the pathways of photosystem I photoinhibition and describe protective mechanisms that prevent photodamage of photosystem I. We propose a hypothesis regarding the influence of photosynthetic control on formation of reactive oxygen species in photosystem I. pH-sensitivity of plastoquinol oxidation at the quinol-oxidizing (Qo) site of the cytochrome b6f complex is analyzed, and function of two proton-conducting channels that release protons into the thylakoid lumen from the cytochrome b6f complex is described. We examine impact of photosynthetic control on the functioning of the cytochrome b6f complex itself, and propose a hypothesis regarding the preferential activation of photosynthetic control in the thylakoid grana, which ensures operation of the cyclic electron transport around photosystem I as a main protective mechanism.
期刊介绍：
Biochemistry (Moscow) is the journal that includes research papers in all fields of biochemistry as well as biochemical aspects of molecular biology, bioorganic chemistry, microbiology, immunology, physiology, and biomedical sciences. Coverage also extends to new experimental methods in biochemistry, theoretical contributions of biochemical importance, reviews of contemporary biochemical topics, and mini-reviews (News in Biochemistry).
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