Influence of Chemically Disrupted Photosynthesis on Cyanobacterial Thylakoid Dynamics
Herbicide treatment effects on the dynamical behavior of cyanobacterial photosynthetic membranes (thylakoids) were measured. Changes in membrane mechanical properties were correlated with their structural organization. This provides an important step in understanding the flexibility of the thylakoids and their active function during energy conversion.
Significance and Impact
This study supports the hypothesis that the proton pressure buildup within the lumenal space during photosynthesis drives dynamical changes in the cyanobacterial thylakoids, that are directly and quantitatively correlated with the mechanical properties of photosynthetic membranes.
− Living Synechocystis sp. PCC 6803 cells were studied during light and dark alternating cycles
− Neutron spin echo spectroscopy measured the dynamical properties of the membranes
− Small-angle neutron scattering measured membrane thickness and spacing Influence of Chemically