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1986 (1)
1Author    G. Wanner, G. Henkelmann, A. Schmidt, H.-P KöstRequires cookie*
 Title    Nitrogen and Sulfur Starvation of the Cyanobacterium Synechococcus 6301 An Ultrastructural, Morphometrical, and Biochemical Comparison  
 Abstract    The effects of nitrogen and sulfur limitation on various cellular parameters of the cyanobac­ terium Synechococcus 6301 were studied by electron microscopy, morphometry and biochemical methods. Nitrate and sulfate starvation for 70 h results in a massive glycogen accumulation in parallel to a loss of soluble protein and chlorophyll. Phycobilisomes disappear prior to the degra­ dation of photosynthetic membranes. For sulfate-starved cells, a formation of "storage granules" (poly-ß-hydroxy-butyric acid) is typical which amount up to 10% of the cell volume. The composi­ tion of polar lipids is simple: equal parts of C 16:0 and C 16:1 are present under all nutritional conditions; their amount is directly correlated with the total cellular membrane area as deter­ mined by morphometry. Nitrate starved cells regenerate almost completely in structure and composition within 9 h after nitrate supplementation. Regeneration of sulfate starved cells is retarded; in spite of significant synthesis of phycocyanin within 9 h the cells still exhibit marked signs of starvation. In tro d u ctio n 
  Reference    Z. Naturforsch. 41c, 741 (1986); received February 2/May 15 1986 
  Published    1986 
  Keywords    Cyanobacteria, Synechococcus Phycobiliproteins, Nitrogen Starvation, Sulfur Starvation 
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 TEI-XML for    default:Reihe_C/41/ZNC-1986-41c-0741.pdf 
 Identifier    ZNC-1986-41c-0741 
 Volume    41