Table 1.

Fluorochromes used to dye algal cells.

Dye reagent	Excitation wavelength (nm)	Color of fluorescence	Visualized structures
Congo red	543	Red	Cell wall polysaccharides
Acridine orange	470	Green (cytoplasm), orange (acidic compartments)	Cell compartments with acidic pH
Calcofluor white	456	Blue	Cell wall cellulose