The photosystem-II repair cycle: updates and open questions

Su, Jinling; Jiao, Qingsong; Jia, Ting; Hu, Xueyun

doi:10.1007/s00425-023-04295-w

Cited by 8 publications

(1 citation statement)

References 118 publications

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“…Biophysical chemists and biophysicists use PSII to study visible-to-chemical energy conversion and exciton and electron transfer reactions (see [12]). Molecular biologists have used differentially expressed PSII subunits to learn about bacterial and plastidal gene regulation (see [13]) and have Plants 2024, 13, 811 2 of 14 used PSII to study protein turnover mechanisms (see [14]). Evolutionary biologists analyze the changes (or lack of changes) in PSII subunits from cyanobacteria to plants (see [15]).…”

Section: Introductionmentioning

confidence: 99%

Assembly and Repair of Photosystem II in Chlamydomonas reinhardtii

Mehra,

Wang,

Russell

et al. 2024

Plants

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Oxygenic photosynthetic organisms use Photosystem II (PSII) to oxidize water and reduce plastoquinone. Here, we review the mechanisms by which PSII is assembled and turned over in the model green alga Chlamydomonas reinhardtii. This species has been used to make key discoveries in PSII research due to its metabolic flexibility and amenability to genetic approaches. PSII subunits originate from both nuclear and chloroplastic gene products in Chlamydomonas. Nuclear-encoded PSII subunits are transported into the chloroplast and chloroplast-encoded PSII subunits are translated by a coordinated mechanism. Active PSII dimers are built from discrete reaction center complexes in a process facilitated by assembly factors. The phosphorylation of core subunits affects supercomplex formation and localization within the thylakoid network. Proteolysis primarily targets the D1 subunit, which when replaced, allows PSII to be reactivated and completes a repair cycle. While PSII has been extensively studied using Chlamydomonas as a model species, important questions remain about its assembly and repair which are presented here.

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Section: Introductionmentioning

confidence: 99%

Assembly and Repair of Photosystem II in Chlamydomonas reinhardtii

Mehra,

Wang,

Russell

et al. 2024

Plants

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Strategies for adaptation to high light in plants

Zhang,

Ming,

Wang

et al. 2024

aBIOTECH

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Plants absorb light energy for photosynthesis via photosystem complexes in their chloroplasts. However, excess light can damage the photosystems and decrease photosynthetic output, thereby inhibiting plant growth and development. Plants have developed a series of light acclimation strategies that allow them to withstand high light. In the first line of defense against excess light, leaves and chloroplasts move away from the light and the plant accumulates compounds that filter and reflect the light. In the second line of defense, known as photoprotection, plants dissipate excess light energy through non-photochemical quenching, cyclic electron transport, photorespiration, and scavenging of excess reactive oxygen species. In the third line of defense, which occurs after photodamage, plants initiate a cycle of photosystem (mainly photosystem II) repair. In addition to being the site of photosynthesis, chloroplasts sense stress, especially light stress, and transduce the stress signal to the nucleus, where it modulates the expression of genes involved in the stress response. In this review, we discuss current progress in our understanding of the strategies and mechanisms employed by plants to withstand high light at the whole-plant, cellular, physiological, and molecular levels across the three lines of defense.

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Physiological and molecular mechanisms of the inhibitory effects of artemisinin on Microcystis aeruginosa and Chlorella pyrenoidosa

Sang,

Du,

et al. 2024

Journal of Hazardous Materials

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The photosystem-II repair cycle: updates and open questions

Cited by 8 publications

References 118 publications

Assembly and Repair of Photosystem II in Chlamydomonas reinhardtii

Assembly and Repair of Photosystem II in Chlamydomonas reinhardtii

Strategies for adaptation to high light in plants

Physiological and molecular mechanisms of the inhibitory effects of artemisinin on Microcystis aeruginosa and Chlorella pyrenoidosa

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