ArticlePhotosynthesis research2024
Macroscale structural changes of thylakoid architecture during high light acclimation in Chlamydomonas reinhardtii.
Article in Photosynthesis research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 11 citations in OpenAlex.
- The yellow-in-the-dark chIL Chlamydomonas mutant as a model for time-resolved chloroplast biogenesis and retrograde signaling.Plant physiology · 2026Article
- Acclimation to high and low diurnal light is flexible inProceedings of the National Academy of Sciences of the United States of America · 2026Article
- Too dim, too bright, and just right: Systems analysis of the Chlamydomonas diurnal program under limiting and excess light.The Plant cell · 2025Article
- Fe starvation induces a second LHCI tetramer to photosystem I in green algae.bioRxiv : the preprint server for biology · 2024Article
- State transition is quiet around pyrenoid and LHCII phosphorylation is not essential for thylakoid deformation inProceedings of the National Academy of Sciences of the United States of America · 2022Article
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
Abstract
Photoprotection mechanisms are ubiquitous among photosynthetic organisms. The photoprotection capacity of the green alga Chlamydomonas reinhardtii is correlated with protein levels of stress-related light-harvesting complex (LHCSR) proteins, which are strongly induced by high light (HL). However, the dynamic response of overall thylakoid structure during acclimation to growth in HL has not been fully understood. Here, we combined live-cell super-resolution microscopy and analytical membrane subfractionation to investigate macroscale structural changes of thylakoid membranes during HL acclimation in Chlamydomonas. Subdiffraction-resolution live-cell imaging revealed that the overall thylakoid structures became thinned and shrunken during HL acclimation. The stromal space around the pyrenoid also became enlarged. Analytical density-dependent membrane fractionation indicated that the structural changes were partly a consequence of membrane unstacking. The analysis of both an LHCSR loss-of-function mutant, npq4 lhcsr1, and a regulatory mutant that over-expresses LHCSR, spa1-1, showed that structural changes occurred independently of LHCSR protein levels, demonstrating that LHCSR was neither necessary nor sufficient to induce the thylakoid structural changes associated with HL acclimation. In contrast, stt7-9, a mutant lacking a kinase of major light-harvesting antenna proteins, had a slower thylakoid structural response to HL relative to all other lines tested but still showed membrane unstacking. These results indicate that neither LHCSR- nor antenna-phosphorylation-dependent HL acclimation are required for the observed macroscale structural changes of thylakoid membranes in HL conditions.
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