The nuclei and cytoplasm of growing epidermal and parenchyma cells of Siberian pea are characterized by the presence of spherical bodies. These structures are Feulgen-negative but stain positively with Methyl green — Pyronin and Azure B for the presence of RNA and with Fast green and Bromo phenol blue for basic proteins. At the ultrastructural level, the bodies consist of closely packed fibrils and are distinguished as morphologically changing structures. These inclusions are non-viral in nature and present in0 normal, healthy cells.