Acclimation to high and low diurnal light is flexible in <i>Chlamydomonas reinhardtii</i>.

ABSTRACT: Chlamydomonas acclimates to repeated low (LL) or high light (HL) days by changing the abundance of photosynthetic complexes and the ultrastructure of its thylakoid membranes. These phenotypes persist through the night phases, suggesting a readiness for the daylight environment that is routinely experienced despite the intervening dark periods [S. Dupuis et al., Plant Cell 37, koaf086 (2025), 10.1093/plcell/koaf086]. Here, we investigate how prior acclimation impacts algal fitness upon a change in daylight intensity and how quickly Chlamydomonas can reprogram its photoprotective strategy in a diurnal context. We performed a systems analysis of synchronized populations acclimated to diurnal LL when subjected to HL days and of populations acclimated to diurnal HL when sub

SUBMITTER: Dupuis S 

PROVIDER: S-EPMC12773772 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature