The chromatinic material of the blue-green alga Anabaena cylindrica has complex configurations in the central regions of the cells. The distribution of the chromatin within the cells varies in different filaments, probably in response to variations in the disposition of other cellular components. In electron micrographs of thin sections of organisms fixed by the method of Kellenberger, Ryter, and Séchaud (1958) the centroplasm contains fibrillar and possibly granular components which can be identified as the nuclear material by comparison with stained preparations viewed in the light microscope. The fibrils in the nuclear regions have diameters in the range of 5 to 7 mµ and are embedded in a matrix of lower density. The nuclear regions are not greatly different from the cytoplasm in their electron density. Reducing the calcium content of the fixative results in coagulation of the fibrils to form coarser structures. The significance of the observations is discussed in relation to observations on the fine structure of other classes of algae and of bacteria.
Article|
December 01 1960
THE FINE STRUCTURE OF THE NUCLEAR MATERIAL OF A BLUE-GREEN ALGA, ANABAENA CYLINDRICA LEMM
David A. Hopwood,
David A. Hopwood
From the University Botany School and the Strangeways Research Laboratory, Cambridge, England
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Audrey M. Glauert
Audrey M. Glauert
From the University Botany School and the Strangeways Research Laboratory, Cambridge, England
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David A. Hopwood
From the University Botany School and the Strangeways Research Laboratory, Cambridge, England
Audrey M. Glauert
From the University Botany School and the Strangeways Research Laboratory, Cambridge, England
Received:
May 10 1960
Copyright 1961 by The Rockefeller Institute Press
1960
J Biophys and Biochem Cytol (1960) 8 (3): 813–823.
Article history
Received:
May 10 1960
Citation
David A. Hopwood, Audrey M. Glauert; THE FINE STRUCTURE OF THE NUCLEAR MATERIAL OF A BLUE-GREEN ALGA, ANABAENA CYLINDRICA LEMM . J Biophys and Biochem Cytol 1 December 1960; 8 (3): 813–823. doi: https://doi.org/10.1083/jcb.8.3.813
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