Abstract
1. Triton concentrations of about 0.01% uncouple photosynthetic processes and speed the light-induced reduction of cytochrome b 6 and oxidation of cytochrome b-559. Above 0.05% Triton, electron flow rates rise to a maximum and a slow, almost complete, oxidation of cytochrome b-559 can be observed. 2. Chloroplasts treated with 0.1% Triton are thereafter dependent on Triton for photochemical activity. 3. Kinetic evidence supports the following sequence of electron carriers in relation to Photosystem I: cytochrome b-559-?-cytochrome f-plastocyanin-P700-Photosystem I-?-cytochrome b 6.
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