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Jennings RC, Garlaschi FM, Finzi L, et al. Slow exciton trapping in Photosystem II: A possible physiological role. Photosynth Res. 1996;47(2):167-73doi: 10.1007/BF00016179.
Jennings, R. C., Garlaschi, F. M., Finzi, L., & Zucchelli, G. (1996). Slow exciton trapping in Photosystem II: A possible physiological role. Photosynthesis research, 47(2), 167-73. https://doi.org/10.1007/BF00016179
Jennings, R C, et al. "Slow exciton trapping in Photosystem II: A possible physiological role." Photosynthesis research vol. 47,2 (1996): 167-73. doi: https://doi.org/10.1007/BF00016179
Jennings RC, Garlaschi FM, Finzi L, Zucchelli G. Slow exciton trapping in Photosystem II: A possible physiological role. Photosynth Res. 1996 Feb;47(2):167-73. doi: 10.1007/BF00016179. PMID: 24301824.
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Photosynth Res. 1996 Feb;47(2):167-73. doi: 10.1007/BF00016179.

Slow exciton trapping in Photosystem II: A possible physiological role.

Photosynthesis research

R C Jennings, F M Garlaschi, L Finzi, G Zucchelli

Affiliations

  1. Centro CNR sulla Biologia Cellulare e Molecolare delle Piante, Dipartimento di Biologia, Università di Milano, via Celoria 26, 20133, Milano, Italy.

PMID: 24301824 DOI: 10.1007/BF00016179

Abstract

Photosystem II, which has a primary photochemical charge separation time of about 300 ps, is the slowest trapping of all photosystems. On the basis of an analysis of data from the literature this is shown to be due to a number of partly independent factors: a shallow energy funnel in the antenna, an energetically shallow trap, exciton dynamics which are partly 'trap limited' and a large antenna. It is argued that the first three of these properties of Photosystem II can be understood in terms of protective mechanisms against photoinhibition. These protective mechanisms, based on the generation of non photochemical quenching states mostly in the peripheral antenna, are able to decrease pheophytin reduction under conditions in which the primary quinone, QA, is already reduced, due to the slow trapping properties. The shallow antenna funnel is important in allowing quenching state-protective mechanisms in the peripheral antenna.

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