COMPARISON OF STATE-1 STATE-2 TRANSITIONS IN THE GREEN-ALGA CHLAMYDOMONAS-REINHARDTII AND IN THE RED ALGA RHODELLA-VIOLACEA - EFFECT OF KINASE AND PHOSPHATASE INHIBITORS

In the green alga Chlamydomonas reinhardtii, state transitions occur u pon phosphorylation of the light-harvesting complex. The protein kinas e inhibitor staurosporine, and the phosphoprotein phosphatase inhibito r NaF, suppress state 2 and state 1 transitions, respectively. By cont rast, in the red alga Rhodella violacea none of these inhibitors has a ny effect, suggesting that, in red algae, the mechanisms of redistribu tion of excitation energy are independent of protein phosphorylation.