Figure 5

Photosynthetic long-term capacities of Acetabularia acetabulum and A. peniculus chloroplasts in Elysia timida during starvation. A) Long-term retention of chloroplasts from A. acetabulum and A. peniculus in E. timida during the second starvation phase. E. timida individuals had gone through a first starvation phase until depletion of former chloroplasts, than fed again for a month with either A. acetabulum or A. peniculus and consecutively measured for long-term retention during a second starvation phase with PAM fluorometry. Measurement days have been grouped. B) Long-term retention of chloroplasts from A. acetabulum and A. peniculus in an E. timida individual, which completed three starvation phases. First starvation reflects yields of chloroplasts from A. acetabulum, the second starvation phase those from A. peniculus and the third starvation phase again those from plastids of A. acetabulum. The curves of the second and third phase include the respective re-feeding phase of a month and the consecutive starvation phase. Means and standard deviations are calculated for three consecutive measurements per measurement day.