Blue Light Effects in Halobacteria

  • G. Wagner
Part of the Proceedings in Life Sciences book series (LIFE SCIENCES)


Halophiles, methanogenes and thermoacidophiles to the present knowledge comprise the phylogenetic kingdom of archaebacteria, equally distant from eubacteria and eukaryotes [16]. Compared to the relatively small number of archaebacteria discovered so far, a wide range of physiological capabilities seems realized in this ancient branch of evolution, including heterotrophism, chemoautotrophism and use of captured light [8]. Within the family Halobacteriaceae the species Halobacterium halobium is particularly well adapted to use sunlight in its brightly irradiated salty environment, i.e., the Dead Sea, other salt lakes and alterns close to the coast line. While bacteriocarotenoids function as screening pigments, photoactive retinal-proteins (rhodopsin-like photoreceptors) capture light and channel the photons into photoenergetic and/or photosen- sory processes. Two photoactive retinal proteins from the halobacterial membrane have been well characterized so far (Fig. 1): bacteriorhodpsin (BR)2 as a light-driven electrogenic proton pump [11], and halorhodopsin (HR)2 apparently to mediate electrogenic chloride influx [8a, 13].


Mutant Strain Action Spectrum Orange Light Holland Biomedical Halobacterium Halobium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Abbreviations and halobacterial photoreceptor-mutants used






slow rhodopsin-like photoreceptor


Faraday constant Mutant strain Rl Ml [22] : BR+ HR+ SR+ Mutant strain L-33 [23]: BR HR+ SR+


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Copyright information

© Springer-Verlag Berlin Heidelberg 1984

Authors and Affiliations

  • G. Wagner
    • 1
  1. 1.Botanisches Institut Ider Justus-Liebig-UniversitätGiessenGermany

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