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  • Blackwell Publishing Ltd  (1)
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    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 12 (1989), S. 0 
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Dark-grown cell suspension cultures of Chenopodium rubrum lacking chlorophyll greened strongly upon transfer to illumination and fresh medium. This greening took place both in the presence of sucrose as a carbon source and in a mineral salt medium under an atmosphere enriched in CO2. The synthesis of chlorophyll was in each case closely accompanied by the development of high levels of enzymes typical of photosynthesis. Greening in sugar-containing medium resulted in a rapid acquisition of characteristic features of photomixotrophic cultures, which have the ability to survive for a prolonged period in a minimal photoautotrophic environment in the light long after the initially present sucrose has been depleted from the medium. Greening under autotrophic conditions represented a direct transition from starvation conditions resulting from prolonged heterotrophic batch growth to successful photoautotrophy. Thus, light triggered the build-up of a competent photosynthetic apparatus irrespective of the nutritional necessity for autotrophy. Illumination and greening did not influence catabolic enzyme activities beyond that increase of metabolic activity which is required for the production of photosynthetic machinery.
    Type of Medium: Electronic Resource
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