ArticlePlant physiology2013
High light acclimation in the secondary plastids containing diatom Phaeodactylum tricornutum is triggered by the redox state of the plastoquinone pool.
Article in Plant physiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers.
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57 citing papers in PubMed, 150 citations in OpenAlex.
- Predictive Algal Systems Biology: Integrating Omics, Genome-Scale Metabolic Models, and Machine Learning.Bioengineering (Basel, Switzerland) · 2026Review
- Estimating the redox state of the plastoquinone pool in algae and cyanobacteria via OJIP fluorescence: perspectives and limitations.Photosynthesis research · 2026Article
- Creating an Improved Diatoxanthin Production Line by Knocking OutMarine drugs · 2025Article
- Both major xanthophyll cycles present in nature promote nonphotochemical quenching in a model diatom.Plant physiology · 2025Article
- Pennate diatoms make non-photochemical quenching as simple as possible but not simpler.Nature communications · 2025Article
- What Does It Mean to Be(Come) Arctic? Functional and Genetic Traits of Arctic- and Temperate-Adapted Diatoms.Global change biology · 2025Article
- Shotgun metagenomics reveals the flexibility and diversity of Arctic marine microbiomes.ISME communications · 2025Article
- Article
- A rapid aureochrome opto-switch enables diatom acclimation to dynamic light.Nature communications · 2024Article
- A Knockout of the Photoreceptor PtAureo1a Results in Altered Diel Expression of Diatom Clock Components.Plants (Basel, Switzerland) · 2024Article
- Genome-wide assessment of genetic diversity and transcript variations in 17 accessions of the model diatomISME communications · 2024Article
- Light-dependent signal transduction in the marine diatomProceedings of the National Academy of Sciences of the United States of America · 2023Article
- Biochemical and molecular properties of LHCX1, the essential regulator of dynamic photoprotection in diatoms.Plant physiology · 2022Article
- The Fucoxanthin ChlorophyllFrontiers in plant science · 2022Article
- Impact of Lhcx2 on Acclimation to Low Iron Conditions in the DiatomFrontiers in plant science · 2022Article
- The fine-tuning of NPQ in diatoms relies on the regulation of both xanthophyll cycle enzymes.Scientific reports · 2021Article
- Regulation of Phaeodactylum plastid gene transcription by redox, light, and circadian signals.Photosynthesis research · 2021Article
- The Aureochrome Photoreceptor PtAUREO1a Is a Highly Effective Blue Light Switch in Diatoms.iScience · 2020Article
- An algal enzyme required for biosynthesis of the most abundant marine carotenoids.Science advances · 2020Article
- Diatom Molecular Research Comes of Age: Model Species for Studying Phytoplankton Biology and Diversity.The Plant cell · 2020Review
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Authors and funding
8 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In diatoms, the process of energy-dependent chlorophyll fluorescence quenching (qE) has an important role in photoprotection. Three components are essential for qE: (1) the light-dependent generation of a transthylakoidal proton gradient; (2) the deepoxidation of the xanthophyll diadinoxanthin (Dd) into diatoxanthin (Dt); and (3) specific nucleus-encoded antenna proteins, called Light Harvesting Complex Protein X (LHCX). We used the model diatom Phaeodactylum tricornutum to investigate the concerted light acclimation response of the qE key components LHCX, proton gradient, and xanthophyll cycle pigments (Dd+Dt) and to identify the intracellular light-responsive trigger. At high-light exposure, the up-regulation of three of the LHCX genes and the de novo synthesis of Dd+Dt led to a pronounced rise of qE. By inhibiting either the conversion of Dd to Dt or the translation of LHCX genes, qE amplification was abolished and the diatom cells suffered from stronger photoinhibition. Artificial modification of the redox state of the plastoquinone (PQ) pool via 3-(3,4-dichlorophenyl)-1,1-dimethylurea and 5-dibromo-6-isopropyl-3-methyl-1,4-benzoquinone resulted in a disturbance of Dd+Dt synthesis in an opposite way. Moreover, we could increase the transcription of two of the four LHCX genes under low-light conditions by reducing the PQ pool using 5-dibromo-6-isopropyl-3-methyl-1,4-benzoquinone. Altogether, our results underline the central role of the redox state of the PQ pool in the light acclimation of diatoms. Additionally, they emphasize strong evidence for the existence of a plastid-to-nucleus retrograde signaling mechanism in an organism with plastids that derived from secondary endosymbiosis.
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