A Comprehensive Study of Light Quality Acclimation in Synechocystis Sp. PCC 6803.

Autor:	Zavřel T; Department of Adaptive Biotechnologies, Global Change Research Institute of the Czech Academy of Sciences, Bělidla 986/4a, Brno 60300, Czechia., Segečová A; Department of Adaptive Biotechnologies, Global Change Research Institute of the Czech Academy of Sciences, Bělidla 986/4a, Brno 60300, Czechia., Kovács L; Institute of Plant Biology, HUN-REN Biological Research Centre, Temesvári krt. 62, Szeged 6726, Hungary., Lukeš M; Centre Algatech, Institute of Microbiology of the Czech Academy of Sciences, Novohradská 237, Třeboň 379 01, Czechia., Novák Z; HUN-REN Balaton Limnological Research Institute, Klebelsberg Kuno utca 3., Tihany 8237, Hungary., Pohland AC; HUN-REN Balaton Limnological Research Institute, Klebelsberg Kuno utca 3., Tihany 8237, Hungary., Szabó M; Institute of Plant Biology, HUN-REN Biological Research Centre, Temesvári krt. 62, Szeged 6726, Hungary., Somogyi B; HUN-REN Balaton Limnological Research Institute, Klebelsberg Kuno utca 3., Tihany 8237, Hungary., Prášil O; Centre Algatech, Institute of Microbiology of the Czech Academy of Sciences, Novohradská 237, Třeboň 379 01, Czechia., Červený J; Department of Adaptive Biotechnologies, Global Change Research Institute of the Czech Academy of Sciences, Bělidla 986/4a, Brno 60300, Czechia., Bernát G; HUN-REN Balaton Limnological Research Institute, Klebelsberg Kuno utca 3., Tihany 8237, Hungary.
Jazyk:	angličtina
Zdroj:	Plant & cell physiology [Plant Cell Physiol] 2024 Sep 03; Vol. 65 (8), pp. 1285-1297.
DOI:	10.1093/pcp/pcae062
Abstrakt:	Cyanobacteria play a key role in primary production in both oceans and fresh waters and hold great potential for sustainable production of a large number of commodities. During their life, cyanobacteria cells need to acclimate to a multitude of challenges, including shifts in intensity and quality of incident light. Despite our increasing understanding of metabolic regulation under various light regimes, detailed insight into fitness advantages and limitations under shifting light quality remains underexplored. Here, we study photo-physiological acclimation in the cyanobacterium Synechocystis sp. PCC 6803 throughout the photosynthetically active radiation (PAR) range. Using light emitting diodes (LEDs) with qualitatively different narrow spectra, we describe wavelength dependence of light capture, electron transport and energy transduction to main cellular pools. In addition, we describe processes that fine-tune light capture, such as state transitions, or the efficiency of energy transfer from phycobilisomes to photosystems (PS). We show that growth was the most limited under blue light due to inefficient light harvesting, and that many cellular processes are tightly linked to the redox state of the plastoquinone (PQ) pool, which was the most reduced under red light. The PSI-to-PSII ratio was low under blue photons, however, it was not the main growth-limiting factor, since it was even more reduced under violet and near far-red lights, where Synechocystis grew faster compared to blue light. Our results provide insight into the spectral dependence of phototrophic growth and can provide the foundation for future studies of molecular mechanisms underlying light acclimation in cyanobacteria, leading to light optimization in controlled cultivations. (© The Author(s) 2024. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists.)
Databáze:	MEDLINE
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