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Evolutionary significance of osmoregulatory mechanisms in cyanobacteriaPhysiological processes of all life forms on this planet are intrinsically related to their intracellular water potential. The overall goal was the elucidation of the mechanism(s) whereby the first oxygenic phtoautotrophs (the cyanobacteria) adjust their water potential to that of a changing external water potential (that is, osmoregulate). Osmoregulation is achieved by intracellular adjustment of inorganic and/or organic solutes (osmolytes) involving specific biochemical mechanisms. Structural and biochemical evolution within the cyanobacteria is believed completed (and fixed in present day forms) by the end of the Precambrain eon. Therefore, research using cyanobacteria of all three structural types (unicellular, filamentous, and branched), each grown in the photoautotrophic (PA), photoheterotrophic (PG), and chemotrophic (CH) modes of nutrition, should provide insight into the origin and evolution of the photosynthetically related osmoregulatory mechanisms of eukaryotic organisms. The chloroplasts of these organisms are phylogenetically related to the cyanobacteria.
Document ID
19860017426
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Yopp, J. H.
(University of Southern Illinois Carbondale, IL, United States)
Pavlicek, J. H.
(University of Southern Illinois Carbondale, IL, United States)
Sibley, M. H.
(University of Southern Illinois Carbondale, IL, United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1986
Publication Information
Publication: NASA, Washington Second Symposium on Chemical Evolution and the Origin and Evolution of Life
Subject Category
Space Biology
Accession Number
86N26898
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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