Häder DP. Signal perception and amplification in photoresponses of cyanobacteria.
Biophys Chem 1988;
29:155-9. [PMID:
17010912 DOI:
10.1016/0301-4622(88)87035-2]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/15/1987] [Indexed: 10/17/2022]
Abstract
In addition to a number of other external stimuli, the gliding cyanobacterium, Phormidium uncinatum, uses light as a clue to control movement in order to find and stay in a microhabitat with optimal conditions for growth and survival of the population. Of the three photoresponses developed in cyanobacteria, phototaxis, photokinesis and photophobic responses, the latter are the most prominent for this task. Step-down phobic responses are mediated by the photosynthetic pigments and are linked to the linear electron-transport chain. A change in the fluence rate is reflected by a change in the proton-motive force which is amplifi.
Collapse