Mechanisms to avoid photoinhibition in a desiccation-tolerant cyanobacterium, Nostoc commune.

A desiccation-tolerant cyanobacterium, Nostoc commune, shows unique responses to dehydration. These responses are: (i) loss of PSII activity in parallel with the loss of photosynthesis; (ii) loss of PSI activity; and (iii) dissipation of light energy absorbed by pigment-protein complexes. In this study, the deactivation of PSII is shown to be important in avoiding photoinhibition when the Calvin-Benson cycle is repressed by dehydration. Furthermore, our evidence suggests that dissipation of light energy absorbed by PSII blocks photoinhibition under strong light in dehydrated states. Published in Plant & Cell Physiology, volume 49, issue 3, on pages 488 - 92, in 2008.

Categories: Publication; Types: Citation, Journal Citation; Tags: Nostoc commune, Plant & Cell Physiology, cyanobacteria, dessication tolerance, dessication-induced non-photochemical quenching, All tags... hypertonic treatment, photoinhibition, Fewer tags