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Micro-Structural Analysis of Cyanobacterial Macro-Morphogenesis

Published online by Cambridge University Press:  02 July 2020

Norman Lazaroff  and
Henry H. Eichelberger
Norman Lazaroff
Affiliation:
Dept of Biological Sciences, State University of New Yorkat , Binghamton, NY13902-6000
Henry H. Eichelberger
Affiliation:
Dept of Biological Sciences, State University of New Yorkat , Binghamton, NY13902-6000
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Extract

A seldom studied and poorly understood feature of cyanobacterial growth and development is the formation of ordered macroscopic structures from microscopic cells, trichomes, and filaments. The forms range from nostoc balls and layered mats of comparatively simple structure to more complex erect tree-like (dendroid) macro-structures. Using macrophotography, time lapse micro-cinematography, light and scanning electron microscopy of Nostoc species in pure culture, it has been possible to show how motility, adhesion and aggregation of photo-induced motile trichomes (hormogonia) result in the macro-morphogenesis of dendroid forms.

Nostocacean development proceeds by the differentiation of cells in a cyclic sequence of stages including: long chains of cells in heterocystous filaments, motile hormogonia, and large rounded cells termed the aseriate phase. When grown from localized inocula on solid media, sequential development recycles across the agar surface of the culture. Different strains and species vary in the form and duration of each stage and the photo-response of hormogonia.

Type
Microorganisms: The Good, The Bad, The Unusual
Information
Microscopy and Microanalysis , Volume 6 , Issue S2: Proceedings: Microscopy & Microanalysis 2000, Microscopy Society of America 58th Annual Meeting, Microbeam Analysis Society 34th Annual Meeting, Microscopical Society of Canada/Societe de Microscopie de Canada 27th Annual Meeting, Philadelphia, Pennsylvania August 13-17, 2000 , August 2000 , pp. 656 - 657
Copyright
Copyright © Microscopy Society of America

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References

References:

1.Lazaroff, N., Screening for Anti-Adhesin Antibiotics with Photoinduced Cyanobacteria. U.S. Patent #5,112,742 (1992)Google Scholar
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3.Lazaroff, N., Photomorphogenesis and Nostocacean Development, in Biol of Blue-Green Algae, Blackwell Sci. (1973)Google Scholar