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FINE STRUCTURE OF MELANIN‐PRODUCING AEROMONADS
Author(s) -
Aurstad Kjell,
Dahle Hans Kolbein
Publication year - 1973
Publication title -
acta pathologica microbiologica scandinavica section b microbiology and immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.909
H-Index - 88
eISSN - 1600-0463
pISSN - 0365-5563
DOI - 10.1111/j.0365-5563.1973.tb00015.x
Subject(s) - periplasmic space , electron microscope , cytoplasm , cell envelope , membrane , chemistry , melanin , aeromonas salmonicida , cell wall , cell , cell membrane , biophysics , biology , bacteria , biochemistry , physics , optics , escherichia coli , genetics , gene
The fine structure of Aeromonas liquefaciens and Aeromonas salmonicida grown in enriched and minimal media was examined by electron microscopy. When the organisms were grown aerobically, a larger amount of particles of high electron density was found than compared with cultivation under anaerobic condition. These particles were assumed to consist of melanin type of pigments. The cell wall, which was shown to consist of a distinct triple layered membrane is separated from a more indistinct triple layered cytoplasmic membrane by a relatively electron‐transparent periplasmic space of variable thickness. Channels may occur through the cell envelope, and the possible role of these channels in secretory functions of the cell is discussed. Some large inclusions of low electron density which appeared in the cytoplasma are associated with storage products of the cell.