Energy distribution in the photochemical apparatus ofPorphyridiumcruentum: Picosecond fluorescence spectroscopy of cells in state 1 and state 2 at 77 K
✍ Scribed by Doug Bruce; Cheryl A. Hanzlik; Lucia E. Hancock; John Biggins; Robert S. Knox
- Publisher
- Springer
- Year
- 1986
- Tongue
- English
- Weight
- 442 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0166-8595
No coin nor oath required. For personal study only.
✦ Synopsis
Excitation energy distribution in Porphyridium cruentum in state 1 and state 2 was investigated by time resolved 77 K fluorescence emission spectroscopy. The fluorescence rise times of phycoerythrin, phycocyanin and allophycocyanin (in cells in state 1 and state 2) were very similar in contrast to the emission from chlorophyll a (Chl a) associated with the two photosystems.
In state 2 photosystem II (PSII) Chl a fluorescence emission rose faster than the PSI Chl a emission and decayed more rapidly, and the converse was observed in state i. These kinetic data support the concept of increased energy transfer from PSII Chl a to PSI Chl a in state 2 in P. cruentum.