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MORPHOLOGY AND FINE STRUCTURE OF FISCHERELLA AMBIGUA 1
Author(s) -
Thurston E. Laurence,
Ingram Lonnie O.
Publication year - 1971
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1971.tb01502.x
Subject(s) - protein filament , biology , cell wall , cell division , biophysics , ultrastructure , morphology (biology) , electron microscope , division (mathematics) , layer (electronics) , anatomy , membrane , botany , cell , materials science , optics , zoology , physics , nanotechnology , biochemistry , arithmetic , mathematics
SUMMARY Fischerella ambigua is a branching blue‐green alga, the filamentous nature of which is maintained almost entirely by sheath material. Cell division in this organism most closely resembles the septal division found in most unicellular organisms. In all filamentous blue‐green algae previously examined with the electron microscope, cell division has resulted from the imagination of the plasma membrane and inner wall layer only; both the middle wall and the outer wall layers remain continuous throughout the length of the filament. In Fischerella , by contrast, the plasma membrane and the inner wall layer invaginate to produce initially 2 cells. However, the middle wall layer, outer wall layer, and sheath also invaginate to separate the daughter cells. The sheath alone remains continuous throughout the length of the filament.