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Showing 1–5 of 5 results
Advanced filters: Author: Leonas Valkunas Clear advanced filters

  • Charge separation in oxygenic photosynthesis occurs with high quantum efficiency and is yet to be fully understood. Using two-dimensional electronic spectroscopy, coherent dynamics have now been observed in the photosystem II reaction centre, where charge separation occurs. Supporting simulations suggest that the coherences have mixed electronic–vibrational (vibronic) nature, and may enhance the rate of charge separation. Leaf image: © Michael Wesemann/Alamy.

    • Franklin D. Fuller
    • Jie Pan
    • Jennifer P. Ogilvie
    Research
    Nature Chemistry
    Volume: 6, P: 706-711

  • Non-photochemical quenching protects the photosynthetic apparatus of plants from damage in high light conditions. High-resolution time-resolved fluorescence measurements now show that the level of this photoprotection is regulated by subtle changes in the number of LHCIIs in a quenched state.

    • Jevgenij Chmeliov
    • Andrius Gelzinis
    • Leonas Valkunas
    Research
    Nature Plants
    Volume: 2, P: 1-7

  • Photosystem II is protected against light damage by thermal dissipation of excess energy. Picosecond fluorescence spectroscopy uncovers a mechanism that is only functional when the reaction centre is closed, that is, when the risk of photodamage is high.

    • Shazia Farooq
    • Jevgenij Chmeliov
    • Herbert van Amerongen
    Research
    Nature Plants
    Volume: 4, P: 225-231

  • Photosystem II possesses a protection mechanism to prevent damage when exposed to high-intensity light. Here, the authors analyze the functional consequences of structural changes associated with this process, and show that protection does not undermine energy capture by open reaction centres.

    • Erica Belgio
    • Ekaterina Kapitonova
    • Alexander V. Ruban
    Research
    Nature Communications
    Volume: 5, P: 1-8