6533b838fe1ef96bd12a45c9
RESEARCH PRODUCT
Zeaxanthin Dependent and Zeaxanthin Independent Changes in Nonphotochemical Energy Dissipation
Aloysius WildMichael RichterBirgit BöthinReimund Gosssubject
Quenching (fluorescence)biologyPhysiologyChemistryOxygen evolutionfood and beveragesQuantum yieldPlant Sciencebiology.organism_classificationPhotochemistryZeaxanthinchemistry.chemical_compoundChlorophyllThylakoidSpinachAgronomy and Crop ScienceChlorophyll fluorescencedescription
Summary The influence of zeaxanthin on high-energy-state quenching (qE) of room temperature chlorophyll fluorescence and on the quantum yield of oxygen evolution(ФO2) has been studied with isolated spinach thylakoids. A set of three different pretreatments was tested which all led to thylakoids with high contents of zeaxanthin. Depending on the presence of light the pretreatments differed strongly with respect to their effect on nonphotochemical fluorescence quenching. Independently from the extent of changes in nonphotochemical energy dissipation in the membrane energized state as reflected by nonphotochemical quenching the light pretreatments caused also changes in nonphotochemical energy dissipation in the nonenergized state as measured by the quantum yield of oxygen evolution (ФO2) in uncoupled thylakoids. Zeaxanthin was not involved in the decrease of ФO2.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-04-01 | Journal of Plant Physiology |