ipbaopaMunriternio.foef4TnrpChe.aehnWtllhtDaiwhat1telavelnyyrs Materials and Methods PSII membrane preparation. Spinach (Spinacia oleracia) was grown hydroponically as described previ- ously at 20 °C under cool white fluorescent light (Osram Powerstar HQI-400W/DV dysprosium lamp, ...