Abstract
The photosynthetic energy storage yield of uncoupled thylakoid membranes was monitored by photoacoustic spectroscopy at various measuring beam intensities. The energy storage rate as evaluated by the half-saturation measuring beam intensity (i50) was inhibited by 3-(3,4-dichlorophenyl)-1,1 dimethylurea, by heat inactivation or by artificial electron acceptors specific for photosystem I or photosystem II; and was activated by electron donors to photosystem I. The reactions involving both photosystems were all characterized by a similar maximal energy storage yield of 16±2 percent. The data could be interpreted if we assumed that the energy storage elicited by the photosystems at 35 Hz is detected at the level of the plastoquinone pool.
Original language | English (US) |
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Pages (from-to) | 313-318 |
Number of pages | 6 |
Journal | Photosynthesis Research |
Volume | 23 |
Issue number | 3 |
DOIs | |
State | Published - Mar 1 1990 |
Externally published | Yes |
Keywords
- electron transfer
- energy storage
- photoacoustic spectroscopy
- photosynthesis
- plastoquinone
- thylakoid membranes
ASJC Scopus subject areas
- Plant Science