ArticleScientific reports2021
The fine-tuning of NPQ in diatoms relies on the regulation of both xanthophyll cycle enzymes.
Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
25 citing papers in PubMed, 53 citations in OpenAlex.
- Metabolomic profiling of diatoms reveals distinct impacts of silver nanoparticles and ions.Environmental science. Nano · 2026Article
- NPF2 is involved in intracellular pH regulation and ion balance in the diatom Phaeodactylum tricornutum.The New phytologist · 2026Article
- Structure and regulation of violaxanthin de-epoxidase, a key enzyme in the photoprotection of photosynthesis.Plant physiology · 2026Review
- 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
- Light induced transthylakoidal proton gradient is a key signal driving the downward migration of motile diatoms in sediments.Scientific reports · 2025Article
- Circadian regulation of key physiological processes by the RITMO1 clock protein in the marine diatom Phaeodactylum tricornutum.The New phytologist · 2025Article
- UVR regulation of photoprotection in Phaeodactylum tricornutum (Bacillariophyceae): roles of light energy doses.Photosynthesis research · 2025Article
- Pennate diatoms make non-photochemical quenching as simple as possible but not simpler.Nature communications · 2025Article
- Diatoms exhibit dynamic chloroplast calcium signals in response to high light and oxidative stress.Plant physiology · 2024Article
- Identifying the gene responsible for non-photochemical quenching reversal in Phaeodactylum tricornutum.The Plant journal : for cell and molecular biology · 2024Article
- Regulation of Microalgal Photosynthetic Electron Transfer.Plants (Basel, Switzerland) · 2024Review
- Light Influences the Growth, Pigment Synthesis, Photosynthesis Capacity, and Antioxidant Activities inScientifica · 2024Article
- Sustained xanthophyll pigments-related photoprotective NPQ is involved in photoinhibition in the haptophyte Tisochrysis lutea.Scientific reports · 2023Article
- Adaptation versus plastic responses to temperature, light, and nitrate availability in cultured snow algal strains.FEMS microbiology ecology · 2023Article
- Fluorescence-based primary productivity estimates are influenced by non-photochemical quenching dynamics in Arctic phytoplankton.Frontiers in microbiology · 2023Article
- Cold stress combined with salt or abscisic acid supplementation enhances lipogenesis and carotenogenesis in Phaeodactylum tricornutum (Bacillariophyceae).Bioprocess and biosystems engineering · 2022Article
- Evidence for reversible light-dependent transitions in the photosynthetic pigments of diatoms.RSC advances · 2022Article
- Impaired photoprotection in Phaeodactylum tricornutum KEA3 mutants reveals the proton regulatory circuit of diatoms light acclimation.The New phytologist · 2022Article
- Photosynthesis, Respiration, and Growth of Five Benthic Diatom Strains as a Function of Intermixing Processes of Coastal Peatlands with the Baltic Sea.Microorganisms · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 1 institution in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Diatoms possess an efficient mechanism to dissipate photons as heat in conditions of excess light, which is visualized as the Non-Photochemical Quenching of chlorophyll a fluorescence (NPQ). In most diatom species, NPQ is proportional to the concentration of the xanthophyll cycle pigment diatoxanthin formed from diadinoxanthin by the diadinoxanthin de-epoxidase enzyme. The reverse reaction is performed by the diatoxanthin epoxidase. Despite the xanthophyll cycle's central role in photoprotection, its regulation is not yet well understood. The proportionality between diatoxanthin and NPQ allowed us to calculate the activity of both xanthophyll cycle enzymes in the model diatom Phaeodactylum tricornutum from NPQ kinetics. From there, we explored the light-dependency of the activity of both enzymes. Our results demonstrate that a tight regulation of both enzymes is key to fine-tune NPQ: (i) the rate constant of diadinoxanthin de-epoxidation is low under a light-limiting regime but increases as photosynthesis saturates, probably due to the thylakoidal proton gradient ΔpH (ii) the rate constant of diatoxanthin epoxidation exhibits an optimum under low light and decreases in the dark due to an insufficiency of the co-factor NADPH as well as in higher light through an as yet unresolved inhibition mechanism, that is unlikely to be related to the ΔpH. We observed that the suppression of NPQ by an uncoupler was due to an accelerated diatoxanthin epoxidation enzyme rather than to the usually hypothesized inhibition of the diadinoxanthin de-epoxidation enzyme.
Indexed as
Identifiers
What OpenQuestion holds
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.