Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1)
Plants acclimate to Photosystem I photoinhibition by readjusting the photosynthetic machinery
Julkaisun tekijät: Lempiäinen Tapio, Rintamäki Eevi, Aro Eva-Mari, Tikkanen Mikko
Kustantaja: Wiley
Julkaisuvuosi: 2022
Journal: Plant, Cell and Environment
Tietokannassa oleva lehden nimi: PLANT CELL AND ENVIRONMENT
Lehden akronyymi: PLANT CELL ENVIRON
Volyymi: 45
Julkaisunumero: 10
Aloitussivu: 2954
Lopetussivun numero: 2971
Sivujen määrä: 18
ISSN: 0140-7791
eISSN: 1365-3040
DOI: http://dx.doi.org/10.1111/pce.14400
Verkko-osoite: https://doi.org/10.1111/pce.14400
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/176354176
Photosynthetic light reactions require strict regulation under dynamic environmental conditions. Still, depending on environmental constraints, photoinhibition of Photosystem (PSII) or PSI occurs frequently. Repair of photodamaged PSI, in sharp contrast to that of PSII, is extremely slow and leads to a functional imbalance between the photosystems. Slow PSI recovery prompted us to take advantage of the PSI-specific photoinhibition treatment and investigate whether the imbalance between functional PSII and PSI leads to acclimation of photosynthesis to PSI-limited conditions, either by short-term or long-term acclimation mechanisms as tested immediately after the photoinhibition treatment or after 24 h recovery in growth conditions, respectively. Short-term acclimation mechanisms were induced directly upon inhibition, including thylakoid protein phosphorylation that redirects excitation energy to PSI as well as changes in the feedback regulation of photosynthesis, which relaxed photosynthetic control and excitation energy quenching. Longer-term acclimation comprised reprogramming of the stromal redox system and an increase in ATP synthase and Cytochrome b6f abundance. Acclimation to PSI-limited conditions restored the CO2 assimilation capacity of plants without major PSI repair. Response to PSI inhibition demonstrates that plants efficiently acclimate to changes occurring in the photosynthetic apparatus, which is likely a crucial component in plant acclimation to adverse environmental conditions.
Ladattava julkaisu This is an electronic reprint of the original article. |