On the nature of the photosynthetic energy storage monitored by photoacoustic spectroscopy

✍ Scribed by Robert Carpentier; Roger M. Leblanc; Murielle Mimeault

• Book ID: 104616427
• Publisher: Springer
• Year: 1990
• Tongue: English
• Weight: 456 KB
• Volume: 23
• Category: Article
• ISSN: 0166-8595
• DOI: 10.1007/bf00034861

✦ Synopsis

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 05o) 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 35Hz is detected at the level of the plastoquinone pool.