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Correlation of electronic carotenoid–chlorophyll interactions and fluorescence quenching with the aggregation of native LHC II and chlorophyll deficient mutants
- Source :
- Journal of Chemical Physics
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- The aggregation dependent correlation between fluorescence quenching and the electronic carotenoid–chlorophyll interactions, ϕ Coupling Car S 1 - Chl , as measured by comparing chlorophyll fluorescence observed after two- and one-photon excitation, has been investigated using native LHC II samples as well as mutants lacking Chl 2 and Chl 13. For native LHC II the same linear correlation between ϕ Coupling Car S 1 - Chl and the fluorescence quenching was observed as previously reported for the pH and Zea-dependent quenching of LHC II [1] . In order to elucidate which carotenoid–chlorophyll pair might dominate this correlation we also investigated the mutants lacking Chl 2 and Chl 13. However, also with these mutants the same linear correlation as for native LHC II was observed. This provides indication that these two chlorophylls play only a minor role for the observed effects. Nevertheless, we also conclude that this does not exclude that their neighboured carotenoids, lutein 1 and neoxanthin, might interact electronically with other chlorophylls close by.
Details
- ISSN :
- 03010104
- Volume :
- 373
- Database :
- OpenAIRE
- Journal :
- Chemical Physics
- Accession number :
- edsair.doi.dedup.....c9d714059bada463d12544c1f979b85a