ArticleMicroorganisms2024
Dark Anaerobic Conditions Induce a Fast Induction of the Xanthophyll Cycle in
Article in Microorganisms, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Metabolic changes and biochemical degradation during dark anoxic incubation of Nannochloropsis: implications for low-energy microalgal cell rupture.Bioprocess and biosystems engineering · 2025Article
- Editorial for Special Issue Photosynthetic Microorganisms: Culturing and Biotechnological Applications.Microorganisms · 2025Article
- Optimizing algal hydrogen photoproduction: a simplified and efficient protocol for anoxic induction in a semi-autotrophic approach.Physiologia plantarumArticle
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3 authors.
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Abstract
backgroundDark anaerobiosis promotes the acidification of the thylakoid lumen and a reduction in the plastoquinone (PQ) pool. The relationship between the reduction in the PQ pool in the dark and the induction of the xanthophyll cycle under high light stress was investigated in
methodsTo achieve a comprehensive oxidative/reductive (aerobic/anaerobic conditions) state of the PQ pool, cultures were bubbled with air or nitrogen for 4 h. To induce the xanthophyll cycle, the cultures were then irradiated with 1200 µmol
resultsThe anaerobic cultures exhibited a stronger induction of the xanthophyll cycle with a 3.4-fold higher de-epoxidation state than the aerobic cultures. Chlorophyll fluorescence measurements showed that this response was influenced by the previous redox state of the PQ pool, and that dark anaerobiosis triggers physiological responses, such as exposure to high light. Thus, the photosynthetic apparatus in anaerobic cultures was already alerted, at the moment of high light exposure, to give an appropriate response to the stress with a stronger induction of the xanthophyll cycle than in aerobic cultures.
conclusionsOur results provide new information on the importance of the redox signaling pathway and highlight the importance of the reductive conditions of the PQ pool in regulating the physiological responses of photosynthetic organisms to stress.
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