In vivo Reconstitution of Anabaena sp.PCC7120 Core-membrane Linker Protein ApcE with Phycocyanobilin Energy Transfer from Phycobilisomes to Photosystems of Nostoc flagelliforme Born. Et Flah. During the Rewetting Course and Its Physiological Significance Studies on the Energy Transfer from Phycobilisome to Thylakoid Membrane of Cyanobacteria STUDIES ON PHOTOSYNTHETIC OXYGEN-EVOLUTION AND ULTRASTRUCTURE IN SPIRULINA MAXIMA