Glycogen, a substance related to starch and sugar, is found in the Fungi and Cyanophyceae as a food reserve.
Vol ut-in occurs in the cytoplasm of various Fungi, Bacteria, Cyanophyceae, diatoms, &c., in the form of minute granules which have a characteristic reaction towards methylene blue (Meyer).
The Nucleus.The nucleus has been demonstrated in all plants with the exception of the Cyanophyceae and Bacteria, and even.
The only groups of plants in which typical nuclei have not been found are the Cyanophyceae, Bacteria and Yeast Fungi.
In the Cyanophyceae the contents of the cell are differentiated into a central colorless region, and a peripheral layer containing the chlorophyll and other coloring matters together with granules of a reserve substance called cyanophycin.