Polyphosphate granules in encysted zoospores of Rozella allomycis

Methods of ultracytochemistry and of X-ray energy dispersive analysis have been used to demonstrate that the "gamma-like" granules in encysted zoospores of the chytrid Rozella allomycis contain polyphosphate. The possibility that cysts contain two classes of polyphosphate granules which differ in structure, in function, and in origin is discussed.