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A model of photosynthesis and photo-protection based on reaction center damage and repair

Ross, Oliver N and Moore, C Mark and Suggett, Dave J and MacIntyre, Hugh L and Geider, Richard J (2008) 'A model of photosynthesis and photo-protection based on reaction center damage and repair.' Limnology and Oceanography, 53 (5). pp. 1835-1852. ISSN 0024-3590

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Phytoplankton photosynthesis under the rapidly fluctuating irradiance which results from turbulent mixing through the vertical light gradient is poorly understood. Ship-based measurements often apply the fast repetition rate fluorescence (FRRF) technique in situ or in vivo to gauge the physiological state of the phytoplankton community and infer some of the physical properties of the water column (such as mixing time scales). We describe the development and validation of a model of photosynthetic electron turnover at photosystem II with consideration of downstream limitation, based on the redox state of photosystem II. We also include empirical formulations for slower processes such as photo-protection (from nonphotochemical quenching) and photo-inhibition. By confronting the simple model with laboratory data for Dunaliella tertiolecta, we were able to refine the model so that it faithfully produced rates of photosynthetic electron transfer determined by FRR fluorescence. Further, we were able to validate the model estimates of linear photosynthetic electron transfer rates against completely independent measurements obtained using 14C-bicarbonate assimilation in photosynthesis-light curves. © 2008, by the American Society of Limnology and Oceanography, Inc.

Item Type: Article
Subjects: G Geography. Anthropology. Recreation > GC Oceanography
Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Science and Health
Faculty of Science and Health > Life Sciences, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 04 Aug 2011 10:18
Last Modified: 18 Aug 2022 10:58

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