ArticleThe Journal of biological chemistry2009
Plastid alternative oxidase (PTOX) promotes oxidative stress when overexpressed in tobacco.
Article in The Journal of biological chemistry, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.
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Who cites it
31 citing papers in PubMed, 81 citations in OpenAlex.
- Flavodiiron proteins in Physcomitrium patens: navigating the edge between photoprotection and efficiency.The Plant journal : for cell and molecular biology · 2025Article
- Proximity to Photosystem II is necessary for activation of Plastid Terminal Oxidase (PTOX) for photoprotection.Nature communications · 2024Article
- Singlet Oxygen and Superoxide Anion Radical Detection by EPR Spin Trapping in Thylakoid Preparations.Methods in molecular biology (Clifton, N.J.) · 2024Article
- ROS production and signalling in chloroplasts: cornerstones and evolving concepts.The Plant journal : for cell and molecular biology · 2022Review
- True oxygen reduction capacity during photosynthetic electron transfer in thylakoids and intact leaves.Plant physiology · 2022Article
- PTOX-dependent safety valve does not oxidize P700 during photosynthetic induction in the Arabidopsis pgr5 mutant.Plant physiology · 2022Article
- Here comes the sun: How optimization of photosynthetic light reactions can boost crop yields.Journal of integrative plant biology · 2022Review
- The evolutionary conserved iron-sulfur protein TCR controls P700 oxidation in photosystem I.iScience · 2021Article
- A Commonly Used Photosynthetic Inhibitor Fails to Block Electron Flow to Photosystem I in Intact Systems.Frontiers in plant science · 2020Article
- Contrasting Responses of Plastid Terminal Oxidase Activity Under Salt Stress in Two CFrontiers in plant science · 2020Article
- Contrasting Responses to Stress Displayed by Tobacco Overexpressing an Algal Plastid Terminal Oxidase in the Chloroplast.Frontiers in plant science · 2020Article
- Plastid terminal oxidase requires translocation to the grana stacks to act as a sink for electron transport.Proceedings of the National Academy of Sciences of the United States of America · 2018Article
- The activity of superoxide dismutases (SODs) at the early stages of wheat deetiolation.PloS one · 2018Article
- Overexpression of plastid terminal oxidase inPhilosophical transactions of the Royal Society of London. Series B, Biological sciences · 2017Article
- The role of O2 as an electron acceptor alternative to CO2 in photosynthesis of the common marine angiosperm Zostera marina L.Photosynthesis research · 2016Article
- Distinguishing the Roles of Thylakoid Respiratory Terminal Oxidases in the Cyanobacterium Synechocystis sp. PCC 6803.Plant physiology · 2016Article
- Tuning of Redox Regulatory Mechanisms, Reactive Oxygen Species and Redox Homeostasis under Salinity Stress.Frontiers in plant science · 2016Review
- Thiol-Based Peroxidases and Ascorbate Peroxidases: Why Plants Rely on Multiple Peroxidase Systems in the Photosynthesizing Chloroplast?Molecules and cells · 2016Review
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Authors and funding
6 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Photoinhibition and production of reactive oxygen species were studied in tobacco plants overexpressing the plastid terminal oxidase (PTOX). In high light, these plants was more susceptible to photoinhibition than wild-type plants. Also oxygen-evolving activity of isolated thylakoid membranes from the PTOX-overexpressing plants was more strongly inhibited in high light than in thylakoids from wild-type plants. In contrast in low light, in the PTOX overexpressor, the thylakoids were protected against photoinhibition while in wild type they were significantly damaged. The production of superoxide and hydroxyl radicals was shown by EPR spin-trapping techniques in the different samples. Superoxide and hydroxyl radical production was stimulated in the overexpressor. Two-thirds of the superoxide production was maintained in the presence of DNP-INT, an inhibitor of the cytochrome b(6)f complex. No increase of the SOD content was observed in the overexpressor compared with the wild type. We propose that superoxide is produced by PTOX in a side reaction and that PTOX can only act as a safety valve under stress conditions when the generated superoxide is detoxified by an efficient antioxidant system.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.