FLUORESCENCE INDUCTION FROM PHOTOSYSTEM-II - ANALYTICAL EQUATIONS FOR THE YIELDS OF PHOTOCHEMISTRY AND FLUORESCENCE DERIVED FROM ANALYSIS OF A MODEL INCLUDING EXCITON-RADICAL PAIR EQUILIBRIUM AND RESTRICTED ENERGY-TRANSFER BETWEEN PHOTOSYNTHETIC UNITS

DC FieldValueLanguage
dc.contributor.authorTRISSL, HW
dc.contributor.authorLAVERGNE, J
dc.date.accessioned2021-12-23T16:06:38Z-
dc.date.available2021-12-23T16:06:38Z-
dc.date.issued1995
dc.identifier.issn03107841
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/7489-
dc.descriptionRobertson Symposium on Chlorophyll Fluorescence - Origins, Measurements, Interpretations and Applications, CANBERRA, AUSTRALIA, MAY 27-29, 1994
dc.description.abstractThe theoretical relationships between the fluorescence and photochemical yields of photosystem II (PSII) and the fraction of open reaction centres are examined in a model based on the following assumptions: (a) a homogeneous, infinite PSII domain; (b) exciton-radical pair equilibrium; and (c) different rates of exciton transfer between `core' and `peripheral' antenna beds. Simple analytical relations are examined for the yields and their time-courses in induction experiments. Variation of the inter-unit transfer rate allows continuous transition from the case of `separated units' to the pure `lake' model. Widely used relations for estimating the fraction of closed reaction centres from the complementary area of the fluorescence, or the photochemical yield from fluorescence levels are derived. An experimental induction curve is analysed, considering its composition of `alpha' and `beta' centres. The sigmoidicity of the induction kinetics is characterised by a single parameter J (corresponding to Joliots' `p'), that is shown to depend on both the connectivity of the photosynthetic units and on reaction centre parameters. On the other hand, the relation between J and the extreme fluorescence levels (or the deviation from the linear Stern-Volmer dependence of 1/Phi(f) on the fraction of open traps) is only controlled by antenna connectivity. Experimental data are more consistent with a model of `connected units' for PSIIalpha than with the pure `lake' model.
dc.language.isoen
dc.publisherCSIRO PUBLISHING
dc.relation.ispartofAUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY
dc.subjectANNIHILATION
dc.subjectANTENNA
dc.subjectBACTERIA
dc.subjectCHLOROPHYLL FLUORESCENCE
dc.subjectEXCITATIONS
dc.subjectHETEROGENEITY
dc.subjectKINETICS
dc.subjectMEMBRANES
dc.subjectMIGRATION
dc.subjectPEA-CHLOROPLASTS
dc.subjectPlant Sciences
dc.titleFLUORESCENCE INDUCTION FROM PHOTOSYSTEM-II - ANALYTICAL EQUATIONS FOR THE YIELDS OF PHOTOCHEMISTRY AND FLUORESCENCE DERIVED FROM ANALYSIS OF A MODEL INCLUDING EXCITON-RADICAL PAIR EQUILIBRIUM AND RESTRICTED ENERGY-TRANSFER BETWEEN PHOTOSYNTHETIC UNITS
dc.typeconference paper
dc.identifier.doi10.1071/PP9950183
dc.identifier.isiISI:A1995QX86400006
dc.description.volume22
dc.description.issue2
dc.description.startpage183
dc.description.endpage193
dc.publisher.placeUNIPARK, BLDG 1, LEVEL 1, 195 WELLINGTON RD, LOCKED BAG 10, CLAYTON, VIC 3168, AUSTRALIA
dcterms.isPartOf.abbreviationAust. J. Plant Physiol.
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